Entries |
Document | Title | Date |
20080278137 | CIRCUITS AND METHODS TO PRODUCE A VPTAT AND/OR A BANDGAP VOLTAGE - Provided herein are circuits and methods to generate a voltage proportional to absolute temperature (VPTAT) and/or a bandgap voltage output (VGO). A circuit includes a group of X transistors. A first subgroup of the X transistors are used to produce a first base-emitter voltage (VBE | 11-13-2008 |
20080309307 | High Voltage Power Switches Using Low Voltage Transistors - A switching regulator having first and second power switches. The first power switch has at least two transistors connected in series, the transistors having a first maximum voltage across their terminals which is less than the input voltage of the regulator. The transistors have at least a first node at the point where they are connected, and a first control circuit controls the voltage at the first node so that the voltages across the terminals of the transistors of the first power switch do not exceed the first maximum voltage. The second power switch also has at least two transistors connected in series, the transistors having a maximum voltage across their terminals that is less than the input voltage. The transistors have at least a second node at the point where they are connected, and a second control circuit controls the voltage at the second node so that the voltages across the terminals of the transistors of the second power switch do not exceed the second maximum voltage. | 12-18-2008 |
20080315854 | Input/Output Regulating Circuitry with Self-Electrostatic-Discharge Protection - An I/O regulating circuitry is provided. The I/O regulating circuitry omits the ESD device in a CMOS process with a minimized critical dimension to reduce chip size while still maintaining electrostatic discharge immunity. The I/O regulating circuitry is applied in MLC flash memory applications and the flash controller thereof. | 12-25-2008 |
20090001957 | Electronic Voltage Supply Method and Apparatus - A method and apparatus for supplying a voltage in an information handling system. A modulated voltage signal output circuit linked to an amplitude control element. The amplitude control element linked to a voltage output circuit, the output circuit including one or more electrical energy-storage elements to receive an electrical current. The voltage output circuit having one or more electronic switches to alter the current passing to the energy-storage element(s) to provide a modulated voltage output. | 01-01-2009 |
20090066311 | PRE-CONDITIONER WITH LOW VOLTAGE COMPONENTS - A pre-conditioner circuit comprising first and second pre-conditioner modules ( | 03-12-2009 |
20090066312 | Reference voltage generation circuit, drive circuit, light emitting diode head, and image forming apparatus - A reference voltage generation circuit for outputting a reference voltage from an input voltage includes a specific voltage output unit for outputting a specific voltage from the input voltage; a first circuit section for outputting the reference voltage with a positive temperature property from the specific voltage output from the specific voltage output unit; and a second circuit section for setting a level of the reference voltage output from the first circuit section. The specific voltage output unit is formed of a regulator circuit having a first terminal connected to a power source. The first circuit section is formed of a bi-polar transistor element connected to a second terminal of the regulator circuit. The second circuit section is formed of a resistor connected to the second terminal of the regulator circuit, a collector terminal of the bi-polar transistor element, and an emitter terminal of the bi-polar transistor element. | 03-12-2009 |
20090096438 | VOLTAGE CONTROL CIRCUIT - A voltage control circuit accepts an input voltage and produces a regulated output voltage. Embodiments provide improved responsiveness to variations in input voltage, load current, and ambient temperature. Exemplary embodiments include an NPN transistor connected between the input and output terminals, which is controlled by a feedback circuit. In an embodiment, the feedback circuit includes a PMOS transistor and in another embodiment the feedback circuit includes a PNP transistor. | 04-16-2009 |
20090102449 | POWER SUPPLY DEVICE WITH VOLTAGE CONVERTER CIRCUIT - A power supply device with voltage converter circuit comprises a power supply device, a boost loop, a buck loop, and a control unit. The power supply device supplies power by any means. The boost loop is used to step up the voltage of power output by the power supply device. The buck loop is used to step down the voltage of power output by the power supply device. The boost loop and the buck loop are electrically connected in parallel. The control unit selects the use of boost loop or buck loop for the voltage conversion of the power supply device. The control unit monitors the power output of the power supply device and controls the action of the boost loop or the buck loop such that the power supply device would output voltage desired by the system via voltage conversion. | 04-23-2009 |
20090146636 | SWITCHING ELEMENT, VARIABLE INDUCTOR, AND ELECTRONIC CIRCUIT DEVICE HAVING CIRCUIT CONFIGURATION INCORPORATING THE SWITCHING ELEMENT AND THE VARIABLE INDUCTOR - An inexpensive variable inductor has inductance value continuously changeable without reducing a Q value. When a control voltage is applied to a control terminal of a MOS transistor from a power supply, a continuity region is formed in a channel, and a region between main terminals becomes conductive. When the control voltage is changed, length of the continuity region in the channel is changed. This changes length of a path area of an induced current, flowing in an induced current film. Thus, the amount of induced current is increased or decreased. Therefore, when the control voltage of the MOS transistor is changed, the inductance value of the coil is continuously changed. | 06-11-2009 |
20090160418 | DC-DC CONVERTER - A DC-DC converter includes a reference voltage generation circuit. The reference voltage generation circuit generates a reference voltage for determination of the pulse width of a drive signal to be supplied to a switching circuit. The reference voltage generation circuit includes a current sensing circuit. The current sensing circuit has a first MOS transistor, a second MOS transistor, a resistive element and an amplifier circuit. | 06-25-2009 |
20090174387 | Semiconductor Device - A disclosed semiconductor device includes a first power terminal to which a high voltage is applied; a clamping circuit electrically connected to the first power terminal; and an internal circuit electrically connected to the clamping circuit and driven by a voltage lower than the high voltage. The clamping circuit includes a bipolar transistor. The emitter of the bipolar transistor is electrically connected to the first power terminal. The collector of the bipolar transistor is grounded. The base of the bipolar transistor is electrically connected to the collector of the bipolar transistor. | 07-09-2009 |
20090174388 | Dual power switch and voltage regulator using same - The present invention discloses a dual power switch and a voltage regulator using the dual power switch. The dual power switch comprises a PMOS power switch and an NMOS power switch connected in parallel and operating according to corresponding predetermined conditions, respectively. | 07-09-2009 |
20090195235 | DRIVE CIRCUIT AND METHOD OF USING THE SAME - A drive circuit may include a SUPPLY that outputs a first voltage potential, an energy storage device that outputs a second voltage potential, and a LOAD. Switches control the flow of current through the LOAD in a flow direction or in a direction opposite to the flow direction. The first or second voltage potentials can produce current. | 08-06-2009 |
20090201005 | DC TO DC CONVERTER MODULE - Lower surface terminals are disposed at the lower surface of a magnetic substrate. An upper surface electrode is disposed at the upper surface of the magnetic substrate. A control circuit, an input capacitor, and an output capacitor are mounted on the upper surface electrode. The control circuit contains a switching element. A smoothing choke is disposed inside the magnetic substrate. The connection wiring of connecting the upper surface electrode and at least one of the input terminal, the output terminal, and the ground terminal is constructed using an inner conductor passing through the inside of the magnetic substrate, and the connection wiring forms an inductor. | 08-13-2009 |
20090206818 | AC VOLTAGE REGULATION SYSTEM AND METHOD - Control of the RMS AC voltage applied to the load (Motor) utilizes a switching device (SCR) such as a SCR in series between the load and a power source. A controller (lPController) including a processor and an analog to digital converter is connected to the line voltage and floats at line voltage and detects line voltage cross-over ad the voltage drop across the SCR. Abrupt voltage increases in the voltage across the SCR are used to replace the prior art zero current cross-over to permit the calculation of corrective timing to switch the SCR on at the succeeding voltage wave. | 08-20-2009 |
20090237062 | Single-chip common-drain JFET device and its applications - A single-chip common-drain JFET device comprises a drain, two gates and two source arranged such that two common-drain JFETs are formed therewith. Due to the two JFETs merged within a single chip, no wire bonding connection is needed therebetween, thereby without parasitic inductance and resistance caused by bonding wire, and therefore improving the performance and reducing the package cost. The single-chip common-drain JFET device may be applied in buck converter, boost converter, inverting converter, switch, and two-step DC-to-DC converter to improve their performance and efficiency. Alternative single-chip common-drain JFET devices are also provided for current sense or proportional current generation. | 09-24-2009 |
20090251122 | Method for DC/DC Conversion and DC/DC Converter Arrangement - A method for DC/DC conversion which comprises the steps of controlling a first switch ( | 10-08-2009 |
20090251123 | Self-Referencing Voltage Regulator - A voltage regulator includes an input terminal for receiving a power input having a first voltage level, and an output terminal for generating a power output. A reference signal having a second voltage level is derived from the first voltage level adjusted with a predetermined offset value for controlling the power output to be at a third voltage level proportional to the second voltage level. | 10-08-2009 |
20090261800 | Voltage Protection Circuit for Thin Oxide Transistors, and Memory Device and Processor-Based System Using Same - Devices, reference voltage generators, systems and methods are disclosed, including an embodiment of a voltage regulator output transistor using a thin gate insulator to provide a low output impedance despite having a semiconductor channel width that is relatively small. The output transistor is protected from damage by a clamping circuit provided to limit the gate-to-source voltage of the transistor such that damage to the output transistor should be reduced or prevented. One such clamping circuit includes a clamp transistor that receives a reference voltage at its gate. The magnitude of the reference voltage limits to voltage to which the gate of the transistor can be driven. A voltage reference circuit provides the reference voltage so that it compensates for process and temperature variations of the output transistor. | 10-22-2009 |
20090284241 | SWITCHING POWER CONVERTERS WITH DIODE REVERSE CURRENT SUPPRESSION - A switching power converter includes an input terminal for receiving an input voltage, an output terminal for supplying an output voltage, a coupled choke having a main winding and an auxiliary winding, an output capacitor coupled to the output terminal, a main diode coupled between the auxiliary winding and the output terminal, and a switch having first and second positions. The main and auxiliary windings are connected to be charged by an input voltage when the input voltage is coupled to the input terminal and the switch is in the first position. The auxiliary winding is connected to reverse bias the main diode when the switch is switched from the first position to the second position to thereby suppress reverse recovery current in the main diode. The power converter may further include an auxiliary diode coupled between a common node of the main and auxiliary windings and the output terminal, as well as an inductor in series with the auxiliary diode. | 11-19-2009 |
20090295358 | Driving Device - The present invention relates to a driving device. The driving device according to the present invention includes a main transistor that supplies a current to a load by using a power supply, an auxiliary transistor that drops a predetermined voltage of the voltage of the power supply and transmits the dropped voltage to the main transistor in a turn-on state, and a bypass switch that transmits the voltage of the power supply to the main transistor when the auxiliary transistor is turned off. | 12-03-2009 |
20090302821 | CIRCUIT AND METHOD FOR OPERATING A CIRCUIT - A circuit and method for operating a circuit is provided that includes a circuit section that has a number of memory elements, a first voltage regulator that can be connected or is connected to the circuit section in order to operate the circuit section, a second voltage regulator that can be connected or is connected to the circuit section in order to preserve an information item stored in the memory elements, a switching device that is connected to the circuit section and is designed to deactivate and activate inputs of the circuit section. The circuit being configured to control a deactivation and activation of the first voltage regulator and the deactivation and activation of the inputs of the circuit section. | 12-10-2009 |
20090309568 | Power supply circuit and control method of the same - A power supply circuit is provided which includes a first booster to boost a power supply voltage supplied from a battery and generate a first boosted voltage, a second booster to boost the power supply voltage at a higher multiplication factor than the first booster and generate a second boosted voltage, a power supply selection circuit to output the first boosted voltage or the second boosted voltage, a first smoothing capacitor placed at an output end of the power supply selection circuit, and a second smoothing capacitor placed at an output end of the second booster. | 12-17-2009 |
20100019753 | DC/DC POWER CONVERTING APPARATUS - Three or more circuits including a driving inverter circuit and rectifier circuits are connected in series, each of the circuits including a high-voltage side MOSFET and a low-voltage side MOSFET connected in series as well as a smoothing capacitor having positive and negative terminals between which the MOSFETs are connected. LC series circuits, each including a capacitor and an inductor, are disposed individually between one specific circuit and the other circuits with periods of resonance of the LC series circuits made equal to one another. In performing DC/DC power conversion through charging and discharging operation of the capacitors, a resonance phenomenon of the LC series circuits is used to improve conversion efficiency and achieve a reduction in size of the apparatus structure. | 01-28-2010 |
20100019754 | Power Converter for Solar Electrical Current Installations and Method for Controlling it - A power converter having a d.c. voltage input which varies over time and has a maximum voltage, a level converter and at least one inverter, which can be connected to an electrical network. The positive input of the d.c. voltage input is connected with a first switch and with the anode of a first diode. The negative input of the d.c. voltage input is connected with a second switch and with the cathode of a second diode. The cathode of the first diode is connected with a first capacitor, the anode of the second diode with a second capacitor. The two switches and the two capacitors are connected, and their center taps are likewise connected. This constitutes the level converter, which is connected with a downstream inverter. The two capacitors are thereby charged, independently of the input voltage, each at half the value of the set-point intermediate circuit voltage. | 01-28-2010 |
20100026271 | POWER CONVERTERS AND ASSOCIATED METHODS OF OPERATION - Power converters and associated methods of operation are disclosed herein. In one embodiment, a power converter includes a first switch and a second switch electrically coupled to the first switch in series. The first switch is electrically coupled to a first node and to a second node via the second switch. The power converter further includes a capacitor and a third switch electrically coupled to the first node and to the second node via the capacitor and the second switch. The third switch has a linear-active region of operation. | 02-04-2010 |
20100066341 | POWER CONVERTER - A power converter includes an input unit, an output unit, first and second capacitors connected in series, a first electric conduction control device, a second electric conduction control device, a third electric conduction control device, and a fourth electric conduction control device, and a control circuit for performing on/off control on those electric conduction control devices. The first electric conduction control device and the fourth electric conduction control device have a first path through which a current flowing between the input unit and the output unit is allowed to flow in one direction, and a second path which has a switch function of allowing the current flowing between the input unit and the output unit to flow through or shutting off such a current. | 03-18-2010 |
20100079128 | LOW NOISE EXTERNAL ENABLE SWITCHER CONTROL SIGNAL USING ON-CHIP SWITCHER - A method and system is disclosed for powering device sub-circuitry of an electronic device. The sub-circuitry may be used to provide control signals to a direct current switcher on a main system board, thus eliminating passive circuitry typically associated with the sub-circuitry. Furthermore, by actively generating the control signals for the direct current switcher, explicit timing control circuitry is not required to synchronize the transmitted power to the sub-circuitry. | 04-01-2010 |
20100097046 | POWER SUPPLY CIRCUIT - A power supply circuit for a motherboard includes a VRM, a first NMOS transistor, a second NMOS transistor, a first capacitor, a first induction coil, and a delay circuit. A gate of the first NMOS transistor is connected to a UGATE pin of the VRM. A source of the first NMOS transistor is connected to a BOOT pin of the VRM via the first capacitor and a PHASE pin of the VRM, and connected to an MCH on the motherboard via the first induction coil. A drain of the first NMOS transistor is connected to a system power. A gate of the second NMOS transistor is connected to an LGATE pin of the VRM. A source of the second NMOS transistor is grounded. A drain of the second NMOS transistor is connected to the source of the first NMOS transistor and the delay circuit. | 04-22-2010 |
20100127687 | Programmable Voltage Reference - A programmable voltage reference includes a temperature compensated current source and a voltage reference circuit. The temperature compensated current source includes an output configured to provide a reference current. The voltage reference circuit includes an input coupled to the output of the temperature compensated current source and a reference output. The voltage reference circuit includes a self-cascode metal-oxide semiconductor field-effect transistor structure that includes a first device that is diode-connected and operates in a weak inversion saturation region and a second device that operates in a weak inversion triode region. A length of the second device is selectable. The voltage reference circuit is configured to provide a reference voltage on the reference output based on the reference current. | 05-27-2010 |
20100156381 | Voltage Regulating Device for Load Starting - The present invention provides a voltage regulating device for load starting, wherein the voltage regulating device comprises a voltage regulating circuit, and a switch circuit configured to be operably coupled between an output terminal of voltage regulating circuit and a load; wherein the switch circuit is configured to disconnect the voltage regulating circuit from the load when the voltage regulating circuit connects to a DC power. | 06-24-2010 |
20100164464 | POWER DISTRIBUTOR AND SEMICONDUCTOR DEVICE HAVING THE SAME - A power distributor includes a large reservoir capacitor, a switch coupled between at least one power supply line and the large reservoir capacitor, and a controller configured to turn on or off the switch based on whether a circuit block connected to the power supply line is in operation or not. | 07-01-2010 |
20100176785 | Clamp unit, and power supply having the same cross-reference to related application - A clamp unit is adapted for controlling a clamp switch of a power supply such that the power supply outputs an output voltage in an ON mode when the clamp switch is in an ON-state and that the power supply does not output the output voltage in an OFF mode when the clamp switch is in an OFF-state. The clamp unit includes: a coupling circuit for outputting a coupling voltage in response to first and second reference voltages, and a control signal outputted by a control signal generating circuit in response to an input voltage; and a detecting circuit for outputting a clamp signal to the clamp switch in response to a first signal indicating whether the power is in the ON mode or the OFF mode, and a second signal indicating whether the power supply is to output the output voltage. | 07-15-2010 |
20100181985 | Regulator Circuit and RFID Tag Including the Same - One object of the present invention is to provide a regulator circuit with an improved noise margin. In a regulator circuit including a bias circuit generating a reference voltage on the basis of the potential difference between a first power supply terminal and a second power supply terminal, and a voltage regulator outputting a potential to an output terminal on the basis of a reference potential input from the bias circuit, a bypass capacitor is provided between a power supply terminal and a node to which a gate of a transistor included in the bias circuit is connected. | 07-22-2010 |
20100194372 | MODE CONTROL CIRCUIT FOR SWITCHING REGULATORS AND METHOD THEREOF - A mode control method and apparatus for a switching regulator is disclosed. The method receives an input signal and amplifying the input signal to get an amplified signal. The amplified signal is sent to a sample circuit to get a sample signal. The sample signal is delivered to an averaging circuit to get an averaged sensed output signal. The averaged sensed output signal is compared with a first pre-determined threshold or an second pre-determined threshold to get a PWM enable signal. The appropriate mode is determined based on the PWM enable signal. | 08-05-2010 |
20100201339 | TEMPERATURE VARIANCE NULLIFICATION IN AN INRUSH CURRENT SUPPRESSION CIRCUIT - The temperature dependence of an inrush current suppression circuit comprising a MOSFET having an input terminal coupled to a direct current input voltage can a transistor electrically coupled to the MOSFET can be reduced by matching the temperature coefficient of a transistor to a component electrically coupled to the transistor. | 08-12-2010 |
20100201340 | LOW-SWING DIFFERENTIAL SIGNAL OUTPUT DRIVER WITH WIDE-RANGE SUPPLY VOLTAGE OPERABILITY - According to one general aspect, an output driver configured to drive output signals from a core device may include a voltage convertor, an output stage, and a biasing unit. In various embodiments, the output driver is configured to operate in either a core device voltage mode or a high voltage mode. In some embodiments, the voltage convertor may be configured to receive a pair of differential input signals from a core device, wherein a maximum voltage of the input signals is equivalent to a core device voltage, and convert the input signals to a pair of intermediate input signals. In one embodiment, when in high voltage mode, the maximum voltage of the intermediate input signals may be equivalent to a high voltage that is higher than the core device voltage. In some embodiments, the output stage configured to receive the intermediate input signals, and produce a pair of differential output signals having a maximum voltage of, based upon the operating mode of the output driver, either the core device voltage or the high voltage. In various embodiments, the biasing unit configured to provide a biasing current to the output stage, wherein the biasing current is configured to produce a desired common mode voltage within the output stage. | 08-12-2010 |
20100225295 | Digital Regulator In Power Management - A method and system for controlling a plurality of output voltages. | 09-09-2010 |
20100225296 | HIGH VOLTAGE AND HIGH POWER BOOST CONVETER WITH CO-PACKAGED SCHOTTKY DIODE - A high voltage and high power boost converter is disclosed. The boost converter includes a boost converter IC and a discrete Schottky diode, both of which are co-packaged on a standard single common die pad. | 09-09-2010 |
20100231192 | DC POLARITY CONVERTER AND DC PARALLEL TOPOLOGY, AND METHODS - Embodiments of DC power related systems and methods are described generally herein. Other embodiments may be described and claimed. | 09-16-2010 |
20100237847 | POWER SUPPLY CIRCUIT - A power supply circuit has a first MOSFET having a body region between the source and drain. The body region is connected so as to be at the same potential as the source. Application of a suitable potential to the gate causes the MOSFET to switch to a conductive on state. The power supply circuit also has signal generation circuitry, which generates a signal indicative of a conductive state of the first MOSFET. The signal generation circuitry generates a reference voltage of a predetermined potential difference from the source potential. The power supply circuit further comprises a second MOSFET having a body region connected so as to be at the same potential as the drain of the first MOSFET, and the second gate is connected to receive the reference voltage. When the potential of the drain of the first MOSFET falls a predetermined voltage below the reference voltage the second MOSFET is switched to a conductive on state between the second source and the second drain, the signal being dependent upon the state of the second MOSFET. | 09-23-2010 |
20100244807 | DC-DC CONVERTER AND A METHOD FOR PRODUCING THE SAME - A DC-DC converter adopted in a mobile device, for converting a DC input voltage to a DC output voltage is provided. The converter comprises an input circuit, a control circuit, and a switch. The input circuit is connected in series with a line for supplying the DC input voltage and includes a parallel connection of a first capacitor and a snubber circuit. The control circuit is provided for producing a control signal. The switch, connected with the input circuit, is adapted to turn ON or OFF in accordance with the control signal, so as to produce the DC output voltage. | 09-30-2010 |
20100253310 | EFFICIENT POWER REGULATION FOR CLASS-E AMPLIFIERS - A power converter device and method are provided. The power converter device includes an input power source and an input inductor configured for coupling a power of the input power source to the device. A switch is configured to regulate a power of the input power source through the input inductor. A shunting diode is coupled between the switch and the input inductor. A resonant load is coupled with the input inductor. A switching element is coupled with the input inductor and the resonant load and configured to operate at a fixed frequency. The power converter device also includes a control circuit for modulating a frequency of the switch and a driving module for driving the switching element at the fixed frequency. In an exemplary embodiment, the power converter device is a Class-E amplifier. The fixed frequency is a frequency equal to a resonant frequency of the resonant load. In one embodiment, the power converter device is configured as an integrated circuit device. | 10-07-2010 |
20100253311 | CHARGE RECYCLING A 1 OF N NDL GATE WITH A TIME VARYING POWER SUPPLY - This disclosure describes an invention that is a basic charge recycling gate | 10-07-2010 |
20100259241 | Voltage step-down switching DC-to-DC converter - A number of non-isolated and isolated converter embodiments are disclosed all featuring the three switches and characteristic not present in prior-art converters such as: a) reduced voltage stresses on all three switches resulting in safe operation without a danger of voltage overstress of any of the three switches over the full operating range from duty ratio of 0 to 1.0 and thus resulting in wide input voltage operating. b) operating range with magnetics flux and magnetic size much reduced compared to prior-art converters c) stressless switching eliminates switching losses and reduces stresses which are present in prior-art converters. All three features result in simultaneous increase of efficiency, reduction of size and cost when compared with prior-art converters. | 10-14-2010 |
20100270996 | CIRCUIT AND METHOD TO STARTUP FROM VERY LOW VOLTAGES AND IMPROVE ENERGY HARVESTING EFFICIENCY IN THERMOELECTRIC HARVESTERS - An energy harvesting system is provided that includes a startup module for starting the energy harvesting system operation from a completely OFF state. The startup module uses mechanical vibrations due to motion to trigger a switch which permits the startup module to charge one or more first capacitive elements so to as reach a first defined voltage. A storage module buffers energy obtained from a thermoelectric harvester to be used by a load device. The storage module commences storing energy from the thermoelectric harvester when the first defined voltage has been reached allowing charging of one or more second capacitive elements to reach a second defined voltage. A DC-DC converter module provides regulated voltage to the load device after energy has been transferred from the thermoelectric harvester. The DC-DC converter module determines whether the second defined voltage has been reached and releases stored energy in the one or more first capacitive elements and the load device. | 10-28-2010 |
20100270997 | ARRANGEMENT AND APPROACH FOR PROVIDING A REFERENCE VOLTAGE - A reference voltage that is consistent over various operational conditions and uses low power is provided. According to an example, an internal temperature-compensated voltage (e.g., vdd_int in | 10-28-2010 |
20100301830 | SEMICONDUCTOR DEVICE INCLUDING VOLTAGE GENERATOR - A semiconductor device includes a voltage generator. The voltage generator includes a detection circuit having a number of voltage detection units, each detection unit including a different number of resistors compared to other detection units and each detection unit outputting a respective voltage, a voltage comparison circuit configured to compare a constant voltage to each respective divided voltage outputted from detection units of the detection circuit and to output a number of control signals in response to the comparison, and a reference voltage generator configured to generate a reference voltage in response to the control signals. | 12-02-2010 |
20100301831 | ZERO-VOLTAGE SWITCHING POWER CONVERTER - The zero-voltage converter is able to perform at extremely high power levels and bares significant benefits to all levels; system, inverter and circuitry level. Power losses are avoided by using a new developed resonant topology. EMI problems are reduced by power module integrated capacitors as well as smart selection of the terminal technology and under full utilization of the analog components and their potentials. The power module developed for this specific application is designed under a maxim of gaining highest power density as well as lowest stray inductances. High switching frequencies enable even special electro motors with extremely low leakage inductance to perform well. This is in particular beneficial for ultra high speed drives or motors with a high pole pair number. The mechanical concept of the inverter can specifically be adopted to the referring vehicle and to its available installation space. Thus, also (hybrid) electrical vehicles can be designed based on such highly innovative conception. | 12-02-2010 |
20100320992 | Buck-Boost Converter With Sample And Hold Circuit In Current Loop - In an average-current mode control type buck-boost PWM converter, a sample and hold circuit is inserted in the current loop to avoid problems associated with ripple of the average inductor current demand signal. The rippling average inductor current is generated by a differential transconductance amplifier having applied to its inputs an error signal and a signal corresponding to the instantaneous current through the inductor, where the output of the amplifier is filtered. The rippling average inductor current is sampled and held at the beginning of each switching cycle, prior to the average inductor current demand signal being compared to buck and boost sawtooth waveforms. By using the sample and hold circuit, the feedback loops are easier to stabilize, and the converter cannot switch modes during a switching cycle. | 12-23-2010 |
20100327838 | SWITCHING POWER CONVERTER WITH CURRENT SENSING TRANSFORMER AUXILIARY POWER SUPPLY - A switching power converter having a current sensing transformer providing input to an auxiliary power supply provides efficient current sensing, while reducing the cost of the magnetic coupling element. The auxiliary power supply and current sense circuit both receive input from a secondary winding of a current sensing transformer having a primary winding coupled in series with the converter's main magnetic coupling element. To provide accurate sensing, the magnetization the current sensing transformer is accounted for. The magnetization is compensated for in the current sensing result, current sensing is performed during a part of the cycle in which charging of the auxiliary power supply is disabled, or the core of the current sensing transformer is made large, raising its mutual inductance. In another alternative technique, a circuit node can be pre-charged to a value that cancels the offset due to the magnetization current. | 12-30-2010 |
20100327839 | DRIVING CONTROLLER AND INTERNAL VOLTAGE GENERATION CIRCUIT - A driving controller for use in stabilizing transient voltages from power supplies is presented. The driving controller includes a first pulse generator, a second pulse generator, and a control signal generator. The first pulse generator is configured to generate a power-up pulse signal including a pulse activating at a time of terminating a power-up period. The second pulse generator is configured to generate a detection pulse signal including a pulse that is being active from a time when an internal voltage reaches a predetermined level. The control signal generator is configured to generate an operation control signal, which controls a driving controller activating the internal voltage, in response to the power-up pulse signal and the detection pulse signal. | 12-30-2010 |
20100327840 | SUPPLY VOLTAGE INDEPENDENT QUICK RECOVERY REGULATOR CLAMP - Disclosed is an output stage, and associated apparatus, for a voltage regulator that includes a clamp circuit that is operable to ensure that the output voltage recovers quickly, i.e. that the perturbation of this voltage is limited and remains within a given specification, when entering a standby mode and which is controlled in a supply independent manner. | 12-30-2010 |
20110001463 | Transceiver for Controlling Swing Width of Output Voltage - A transceiver for controlling a swing width of an output voltage includes a transmitter and a receiver for receiving an output voltage of a transmitter. The transmitter includes a first signal converter that outputs changed data generated by changing a voltage level of data in response to a mode control signal for selecting a test mode or a normal mode, an output voltage control circuit for controlling a voltage level of an output node of the transmitter in response to the changed data, and a first termination circuit for supplying a changed power supply voltage generated by changing a voltage level of a power supply voltage of the output node of the transmitter, or is turned off, in response to a test mode enable signal or the changed data. The receiver includes a second termination circuit that operates as a resistor having a resistance value that varies in response to the test mode enable signal or a test mode disable signal. | 01-06-2011 |
20110018520 | REFERENCE VOLTAGE CIRCUIT AND ELECTRONIC DEVICE - In order to realize a reference voltage circuit that operates with lower current consumption while maintaining an operation at lower voltage without causing deterioration of a power supply rejection ratio, provided is a reference voltage circuit in which a depletion transistor of an ED type reference voltage circuit is constituted of a plurality of depletion transistors connected in series, and in which a gate terminal of a cascode depletion transistor is connected to a connection point between the depletion transistors of the ED type reference voltage circuit. | 01-27-2011 |
20110018521 | METHOD AND DEVICE FOR INCREASING CONTROL ACCURACY IN A PWM SYSTEM - A method and a device for operating a bridge power supply circuit comprising at least two switch members connected in series between two rails and operated alternatingly to provide a pulse width modulated output signal at a junction between the two transistors. A measurement circuit measures a voltage drop over the lower switch member during conduction of said switch member. The measurement is performed approximately in the middle of the ON-period and is used in the next cycle for calculating the timing signals. A control signal (Ucontrol) is received at an input for the pulse width modulated output signal. The measured voltage drop is added to the control signal before calculating the timing signals. The voltage drop is scaled by a scaling factor of for example 0.8 before being added to the control signal. | 01-27-2011 |
20110025290 | DC Power Converting Circuit and Method Thereof - A direct current (DC) converting circuit includes a DC input end, for receiving a DC input voltage; a DC output end, for providing a predetermined DC voltage; a switch, coupled between the DC input end and the DC output end, for providing a direct path; a DC-DC step-down unit, coupled between the DC input end and the DC output end, for providing a step-down voltage path; and a control unit, coupled to the switch and the DC-DC step-down unit, for detecting the DC input voltage and selecting either the direct path or the step-down voltage path to provide the predetermined DC voltage at the DC output end. The DC power converting circuit can be applied in power supply circuits of multi-media players or TV setup boxes to convert DC input voltage including 5V, 9V or 12V DC voltages to a predetermined DC voltage. | 02-03-2011 |
20110031952 | SEMICONDUCTOR APPARATUS AND POWER SOURCE CIRCUIT - According to one embodiment, a semiconductor apparatus includes a substrate, a semiconductor layer of a first conductivity type, a first semiconductor region of a second conductivity type, a first main electrode, a second semiconductor layer of the second conductivity type, a third semiconductor layer of the first conductivity type, a second main electrode, a gate insulating film, and a gate electrode. An electron injected from the first semiconductor region into the semiconductor layer is recombined with an electron hole injected from the third semiconductor region into the semiconductor layer in a state of a body diode is biased in a forward direction. The body diode includes the semiconductor layer, the first semiconductor region, and the third semiconductor region. | 02-10-2011 |
20110031953 | ENVELOPE TRACKING POWER SUPPLY CIRCUIT AND HIGH-FREQUENCY AMPLIFIER INCLUDING ENVELOPE TRACKING POWER SUPPLY CIRCUIT - The invention aims to maintain a high efficiency even for a high-frequency signal having a wideband envelope. The envelope tracking power supply circuit | 02-10-2011 |
20110031954 | Driving power-supply circuit - The object of the present invention is reducing power consumption of a driving power supply circuit. In the case where the driving voltage Vi is higher than the reference voltage ViH, The signal S | 02-10-2011 |
20110037449 | SEMICONDUCTOR DEVICE - A non-insulated DC-DC converter has a power MOS-FET for a highside switch and a power MOS-FET for a lowside switch. In the non-insulated DC-DC converter, the power MOS-FET for the highside switch and the power MOS-FET for the lowside switch, driver circuits that control operations of these elements, respectively, and a Schottky barrier diode connected in parallel with the power MOS-FET for the lowside switch are respectively formed in four different semiconductor chips. These four semiconductor chips are housed in one package. The semiconductor chips are mounted over the same die pad. The semiconductor chips are disposed so as to approach each other. | 02-17-2011 |
20110037450 | SEMICONDUCTOR DEVICE - In order to reduce parasitic inductance of a main circuit in a power supply circuit, a non-insulated DC-DC converter is provided including a circuit in which a power MOS•FET for a high-side switch and a power MOS•FET for a low-side switch are connected in series. In the non-insulated DC-DC converter, the power MOS•FET for the high-side switch is formed by a p-channel vertical MOS•FET, and the power MOS•FET for the low-side switch is formed by an n channel vertical MOS•FET. Thus, a semiconductor chip formed with the power MOSFET for the high-side switch and a semiconductor chip formed with the power MOS•FET for the low-side switch are mounted over the same die pad and electrically connected to each other through the die pad. | 02-17-2011 |
20110050195 | DC to DC Converter - The invention relates to a DC to DC converter comprising a DC to DC converter unit (DCW), a first field effect transistor (FET | 03-03-2011 |
20110057639 | PASSIVE LOSSLESS SNUBBER CELL FOR A POWER CONVERTER - A passive lossless snubber cell for a switched-mode power converter comprises an energy absorbing circuit and an energy resetting circuit coupled to said energy absorbing circuit. The energy absorbing circuit is arranged to release energy stored in a snubber capacitor of the energy absorbing circuit to a storage capacitor of the energy resetting circuit through a resonant pathway of the snubber cell in response to a first switching action of a power converter transistor switch. The energy resetting circuit is arranged to release the energy stored therein to a part of a circuit of the power converter in response to a second switching action of the power converter transistor switch, the second switching action being a successive action to the first switching action. The passive lossless snubber cell has several advantages over existing snubbering techniques. First, it provides zero-current-switching (ZCS) and zero-voltage-switching (ZVS) conditions for turning on and off, respectively, the switch over a wide load range. Second, it does not introduce extra voltage stress on the switch. Third, by taking the ripple current through the switch into account, the peak switch current during the snubber resonance period is designed to be less than the designed switch current without the snubber. Hence, the proposed snubber does not introduce extra current stress on the switch. | 03-10-2011 |
20110057640 | Storageless step-down switching DC-DC converter - A storageless DC-DC converter is provided having simultaneously ultra high efficiency of 99.5% in an ultra compact size leading to 1 kW/inch | 03-10-2011 |
20110062935 | ENERGY RECOVERY CIRCUIT - An energy recovery circuit receives and stores energy associated with switching transitions in a power converter having a first switch and a second switch configured to be operated to selectively apply a voltage source to an output load. The energy recovery circuit includes an inductive element, a diode, and a capacitive element. The inductive element receives at least a portion of electrical current flowing through one of the first switch and the second switch. The at least a portion of the electrical current flows through the diode to charge the capacitive element with a voltage. The energy recovery circuit includes a recovery power converter to transfer the voltage from the capacitor. | 03-17-2011 |
20110080153 | Circuit And Method For Generating A Reference Voltage - A circuit for generating a reference voltage includes a first transistor configured to receive a reference system voltage, the first transistor configured as a current source, the first transistor configured to provide a current independent of the system voltage, a plurality of diode devices configured to receive the current provided by the first transistor, and a second transistor associated with the plurality of diode devices, the second transistor configured to compensate for process variations in the first transistor, such that the plurality of diode devices provides a reference voltage that is at least partially compensated for the process variations. | 04-07-2011 |
20110089927 | VOLTAGE REGULATOR CIRCUIT - A transistor includes a gate, a source, and a drain, the gate is electrically connected to the source or the drain, a first signal is input to one of the source and the drain, and an oxide semiconductor layer whose carrier concentration is 5×10 | 04-21-2011 |
20110095744 | LINEAR REGULATOR WITH AUTOMATIC EXTERNAL PASS DEVICE DETECTION - A power regulator circuit automatically disables an internal pass transistor when a detection circuit detects the presence of an external pass device. The internal pass transistor is made in an integrated circuit along with a detection circuit and a switch for disabling the internal pass transistor. The detection circuit detects a presence of an external pass device external to the integrated circuit. The switch automatically disables the internal pass transistor when the detection circuit detects the presence of the external pass device. The detection circuit has a comparator for comparing a signal on an outside connection of the integrated circuit and a latch to operate the switch. The comparator compares a voltage on an outside connection of the integrated circuit against a reference after power up of the regulator and can delay operation of the comparison until a predetermined time after power up. An integrated circuit can contain the power regulator circuit and the internal pass transistor. The power regulator circuit can be used on a power supply with a DC power source. | 04-28-2011 |
20110101952 | VOLTAGE REGULATOR WITH GATE RESISTOR FOR IMPROVED EFFICIENCY - A voltage regulator includes an active control switch, an active sync switch, a driver circuit, and a gate resistor. The active control switch is coupled between an input voltage line and an input of an energy storage device. The active sync switch is coupled to the input of the energy storage device. The driver circuit is coupled to the control and sync switches to alternately drive each of the control and sync switches into a conducting state to produce a regulated voltage at an output of the energy storage device. The gate resistor is coupled in series within a control path of the sync switch. The gate resistor has a resistance value that is tuned to reduce an anticipated dead time between a turn-off time of the sync switch and a turn-on time of the control switch. | 05-05-2011 |
20110101953 | Control Device and Switching Power Supply - A control device for a switching power supply includes an frequency-hopping oscillator for generating an oscillating signal and an indication signal, an SR flip flop for outputting a driving signal according to the oscillating signal and the indication signal, to control a primary winding of a transformer of the switching power supply, a comparator for comparing a current sense signal of the primary winding and a subtraction result, to output the comparison result to the SR flip flop, a ramp generator for generating ramp signals with time-varying slopes, and a subtraction unit for performing a subtraction operation on a feedback signal and the ramp signals, to generate the subtraction result for the comparator. | 05-05-2011 |
20110109295 | SEMICONDUCTOR DEVICE AND DC-DC CONVERTER - According to one embodiment, a semiconductor device includes a first switching element and a second switching element. The first switching element has a first threshold voltage and a first gate electrode connected to a first gate wiring. The second switching element has a second threshold voltage and a second gate electrode connected to a second gate wiring. The second threshold voltage has a larger absolute value than the first threshold voltage. The second gate wiring has a larger resistance per unit length than the first gate wiring. | 05-12-2011 |
20110115461 | Semiconductor circuit device and data processing system - Occurrence of power supply noise arising in connection with a step-down action at the time of turning on power supply is to be restrained. A step-down unit is provided with a switched capacitor type step-down circuit and a series regulator type step-down circuit, and stepped-down voltage output terminals of the step-down circuits are connected in common. The common connection of the stepped-down voltage output terminals of both step-down circuits makes possible parallel driving of both, selective driving of either or consecutive driving of the two. In the consecutive driving, even if the switched capacitor type step-down circuit is driven after driving the series regulator type step-down circuit first to supply a stepped-down voltage to loads, the switched capacitor type step-down circuit will need only to be compensated for a discharge due to the loads, and a peak of a charge current for capacitors can be kept low. When operation of the switched capacitor type step-down circuit is started, no large rush current arises, and occurrence of noise is restrained. | 05-19-2011 |
20110121808 | VOLTAGE CONVERTER AND SYSTEMS INCLUDING SAME - A voltage converter includes an output circuit having a high side device and a low side device which can be formed on a single die (i.e. a “PowerDie”) and connected to each other through a semiconductor substrate. Both the high side device and the low side device can include lateral diffused metal oxide semiconductor (LDMOS) transistors. Because both output transistors include the same type of transistors, the two devices can be formed simultaneously, thereby reducing the number of photomasks over other voltage converter designs. The voltage converter can further include a controller circuit on a different die which can be electrically coupled to, and co-packaged with, the PowerDie. | 05-26-2011 |
20110133718 | Semiconductor Device and Power Conversion Apparatus Using the same - A semiconductor device provides a gate electrode formed on a lateral face of a wide trench, and thereby the gate electrode is covered by a gate insulating layer and a thick insulating layer to be an inter layer. Therefore, a parasitic capacitance of the gate becomes small, and there is no potential variation of the gate since there is no floating p-layer so that a controllability of the dv/dt can be improved. In addition, the conductive layer between the gate electrodes can relax the electric field applied to the corner of the gate electrode. In consequence, compatibility of low loss and low noise and high reliability can be achieved. | 06-09-2011 |
20110140681 | DIRECT DC CONVERTER (DC CHOPPER) - A DC voltage converter has a primary side and a secondary side coupled galvanically to the primary side. The primary side has at least one inductor, and the secondary side has at least two secondary capacitors connected in series. A controllable electronic switching device is situated between the primary side and the secondary side. In a first operating mode, depending on the switching position, the secondary capacitors are charged one after the other via the inductor, and the respective charging process ends approximately at the zero crossing of the respective charging current. | 06-16-2011 |
20110140682 | VOLTAGE REGULATOR SUITABLE FOR CMOS CIRCUIT - There is provided a voltage regulator suitable for a CMOS circuit. A voltage regulator suitable for a CMOS circuit according to an aspect of the invention may include: a voltage setting unit setting a voltage across both terminals of a load; a voltage amplification unit setting an input voltage; and a voltage control unit controlling a voltage to be applied to the second connection node according to an output voltage of the voltage amplification unit, wherein the voltage across both terminals of the load is maintained to be constant regardless of variations in a power voltage. | 06-16-2011 |
20110140683 | POWER BOOSTER FOR CABLE SYSTEMS - Device and method for regulating voltage level at section of telecommunications network, the device including an input port, which receives input RF telecommunications signal with input AC voltage from a network portion, isolating circuitry, which isolates input AC voltage, a transformer, which receives the isolated AC voltage, relays, which provide selected voltage gain by selectively switching on connection from transformer secondary winding, thereby deriving regulated AC voltage at predetermined level, control circuitry, which monitors input AC voltage and selectively activates a selected relay while deactivating other relays to provide selected voltage gain, recombining circuitry, which recombines regulated AC voltage with isolated input RF telecommunications signal, and an output port, which provides recombined regulated AC voltage and RF telecommunications signal to another network portion. | 06-16-2011 |
20110148386 | FAST RECOVERY VOLTAGE REGULATOR - This document discusses, among other things, a voltage regulator having a plurality of switching devices, coupled in parallel, and configured to selectively provide a variable available drive current using a comparison of a regulated Dc output voltage to at least one reference voltage. | 06-23-2011 |
20110148387 | SWITCH MODE REGULATOR - A switch mode regulator is provided comprising: a first switch for controlling a current supply to an output inductor of the regulator; a second switch for selectively providing a conductive path to ground for current flowing through the output inductor; and an inverting amplifier having an input connected to an output of the first switch and an output connected to a control input of the second switch. The switch mode regulator may alternatively comprise: a first switch for controlling a current supply to an input inductor of the regulator; a second switch for selectively providing a conductive path to a load for current flowing through the input inductor; and an inverting amplifier having an input connected to an output of the first switch and an output connected to a control input of the second switch. | 06-23-2011 |
20110169474 | Step-down switching PFC converter - The step-down switching converter is provided, which promises to replace the conventional buck converter in many applications due to its many advantage, such as higher efficiency, smaller size, fast transient response and lower cost among other benefits. | 07-14-2011 |
20110169475 | SIGNAL OUTPUT CIRCUIT - A MOSFET at an input side controls the operation of a current mirror circuit in accordance with a level change of a PWM signal applied to its gate. When the current mirror circuit operates, a current generated by a current source flows as a mirror current so that a current flows to discharge electricity charged in a capacitance between a gate and a source through a gate of a MOSFET at an output side. When the current mirror circuit stops its operation, a current flowing from the current mirror circuit through the current source is supplied to the gate of the MOSFET at the output side. | 07-14-2011 |
20110175590 | ELECTRICAL POWER SUPPLY APPARATUS CONTROLLING METHOD AND DISCHARGING METHOD FOR USING THE SAME - Disclosed is an electrical power supply apparatus, comprising a switch circuit; an output circuit connected to an external power source for outputting electrical power primarily; a standby circuit connected to the external power source for outputting standby power; a discharge circuit connected between the output circuit and the external power source, to form a discharge path; and a control circuit, connected to the external power source, being capable of conducting the switch circuit for transferring a power signal of the external power source to the output circuit in a normal mode, being capable of cutting off the switch circuit for transferring a first or a second period of the power signal to the standby circuit in a standby mode, and being capable of conducting the discharge circuit for allowing the electrical power supply apparatus to discharge via the discharge circuit as the external power source is being removed. | 07-21-2011 |
20110175591 | Step-down low ripple switching converter - The step-down switching converter is provided, which promises to replace the conventional buck converter in many applications due to its many advantage, such as higher efficiency, smaller size, fast transient response and lower cost and ultra low output ripple voltage among other benefits. | 07-21-2011 |
20110175592 | BUS DRIVER FOR AVOIDING AN OVERVOLTAGE - An electrical circuit for manipulating at least one of a voltage and a current on a bus wire comprises a first switch having a first gate, a first source, and a first potential reduction unit. The first potential reduction unit is suitable for lowering a potential difference between the first gate and the first source of the first switch, wherein the lowering of the potential difference is caused by a shutting-off of a first control voltage. | 07-21-2011 |
20110181266 | SWITCHING POWER SUPPLY CIRCUIT - There is provided a switching power supply circuit which receives a voltage from a direct current voltage source and supplies a direct current power to a load part. The circuit includes a switching element, a current detection circuit which is serially connected to the switching element, and which converts a current flowing in the switching element into a voltage, a control circuit which outputs a switch driving signal to control an ON/OFF operation of the switching element such that a current flowing in the load part becomes constant, a reference voltage generation circuit which generates a reference voltage proportional to an ON duty of the switch driving signal, and an error amplification circuit which outputs error information between a voltage output from the current detection circuit and the reference voltage. The control circuit adjusts the ON duty of the switch driving signal based on the error information. | 07-28-2011 |
20110199068 | MICROPROCESSOR CONTROLLED VARIATION IN CUT-OUT PULSE APPLICATION IN ALTERNATING CURRENT POWER - A microprocessor operated controller device and associated method for modifying an AC input power to provide a reduced power AC output power to a load when coupled to the controller device. The AC output power has a series of cut-out pulses in each half cycle of the AC output power waveform. The device includes a switching system having a plurality of switching elements for positioning the series of cut-out pulses in each half cycle of a waveform of the AC input power to result in said reduced power AC output power and a switch control system for coordinating opening and closing of the plurality of switching elements during positioning of the series of cut-out pulses. The switch control system includes a synchronization system for synchronizing the switching system with timing of each half cycle of the AC input power waveform. The device also includes a digital processor for selecting a predefined pattern of the series of cut-out pulses from a plurality of predefined patterns of cut-out pulses, such that at least two patterns of the plurality of predefined patterns of cut-out pulses have different combinations of parameter definitions including number of cut-out pulses per half cycle and positioning of the pulses per half cycle. | 08-18-2011 |
20110210713 | POWER CONVERSION APPARATUS AND CONTROL METHOD FOR POWER CONVERSION APPARATUS - A power conversion apparatus includes: a MOSFET ( | 09-01-2011 |
20110215786 | ON-OFF TIMER CIRCUIT FOR USE IN DC-DC CONVERTER - An ON-OFF timer circuit for use in a DC-DC converter to minimize or eliminate the risk of developing sub-harmonic oscillations that may cause the dc-dc system to be unstable is presented. The apparatus controls and limits the ‘On’ time duration and ‘Off’ time duration within one pulse cycle. | 09-08-2011 |
20110215787 | BOOSTING CIRCUIT AND RFID TAG INCLUDING BOOSTING CIRCUIT - One object is to provide a boosting circuit whose boosting efficiency is enhanced. Another object is to provide an RFID tag including a boosting circuit whose boosting efficiency is enhanced. A node corresponding to an output terminal of a unit boosting circuit or a gate electrode of a transistor connected to the node is boosted by bootstrap operation, so that a decrease in potential which corresponds to substantially the same as the threshold potential of the transistor can be prevented and a decrease in output potential of the unit boosting circuit can be prevented. | 09-08-2011 |
20110215788 | DC-DC CONVERTER - The present invention is a DC-DC converter characterized by including a switch element that is provided between one end of a DC power source and one end of a load and turns ON and OFF current input from the DC power source, an inductance element that is provided between one end of the switch element on a load-side end and includes a doughnut-shaped magnetic core and a conductive wire wound around the magnetic core, a commutation switch provided between a node between the switch element and the inductance element and a ground potential, and a capacitance element provided between a node between the inductance element and the load and the ground potential, wherein a magnetic flux density of the magnetic core varies partially. | 09-08-2011 |
20110227553 | LOW POWER HIGH VOLTAGE REGULATOR FOR NON-VOLATILE MEMORY DEVICE - A high-voltage regulator includes a charge pump for generating a high voltage, a voltage regulator for generating a regulated voltage, and an oscillator having an oscillation frequency. The voltage regulator includes an operational amplifier having the high voltage as power supply, a first input, a second input coupled to a voltage reference, and an output. The voltage regulator further includes a first transistor having gate coupled to the output of the operational amplifier, a first terminal coupled to the high voltage and a second terminal coupled to a first voltage divider. The first voltage divider generates a first divided voltage that is coupled to the first input of the operational amplifier. The voltage regulator also includes a second voltage divider for providing a second divided voltage, wherein the second divided voltage controls the oscillator frequency. | 09-22-2011 |
20110227554 | SEMICONDUCTOR DEVICE AND DC-DC CONVERTER - According to one embodiment, a semiconductor device includes a semiconductor layer of a first conductivity type, a base region of a second conductivity type, a diffusion region of the first conductivity type, a control electrode, at least one first semiconductor region of the second conductivity type, a second semiconductor region of the second conductivity type, a first main electrode, and a second main electrode. The base region is selectively provided in a first major surface side of the semiconductor layer. The diffusion region is selectively provided in the base region. The control electrode is provided via an insulating film in a trench being in contact with the diffusion region and penetrating through the base region to the semiconductor layer. The at least one first semiconductor region extends in the semiconductor layer from the first major surface side to a second major surface side of the semiconductor layer and is spaced from the base region. The second semiconductor region is provided between the adjacent trenches and spaced from the trenches in the base region. The first main electrode is electrically connected to the diffusion region, the semiconductor layer, the first semiconductor region, and the second semiconductor region. The second main electrode is electrically connected to the second major surface side of the semiconductor layer. The second semiconductor region penetrates through the base region to the semiconductor layer. | 09-22-2011 |
20110234192 | ON/OFF DETECTION CIRCUIT - An ON/OFF detection circuit for detecting an electronic device includes a switch circuit, a current sampling circuit, an amplifying circuit, and a control circuit. The switch circuit includes an input terminal connected to a constant voltage source, an output terminal coupled to the electronic device, and a control terminal. The current sampling circuit is connected between the input terminal and the output terminal of the switch circuit, and is configured for sampling current flowing to the electronic device and converting sampled current into sampled voltage. The amplifying circuit is configured for filtering and amplifying the sampled voltage. The control circuit controls the ON and OFF of the electronic device and compares the sampled voltages with a comparison voltage to judge the electronic device is qualify or disqualify. | 09-29-2011 |
20110234193 | MULTIPLE PHASE SWITCHING REGULATOR WITH PHASE CURRENT SHARING - A phase current sharing network for a current mode multiphase switching regulator. The multiphase switching regulator includes switching networks for developing phase currents of switching phase networks controlled by pulse control signals for converting an input voltage to an output voltage. The regulator develops the pulse control signals based on current control values and at least one trigger value. The phase current sharing network includes conversion networks and a phase current combining network. Each conversion network provides a phase current value based on a corresponding phase current, such as by directly or indirectly measuring real current or by synthetically developing the phase current value. The phase current combining network develops an average phase current value based on the phase current values, and subtracts the average phase current value from each phase current value to provide the current control values used to control the switching networks. | 09-29-2011 |
20110234194 | INTERNAL VOLTAGE GENERATOR - A internal voltage generator includes a plurality of voltage level detection units, each configured to detect a voltage level of a corresponding internal voltage terminal, based on a predetermined target voltage level assigned to the corresponding internal voltage terminal, and generate a detection signal, a common internal voltage generation unit configured to generate an internal voltage through a pumping operation in response to the detection signal outputted from the voltage level detection units, and a path multiplexing unit configured to selectively output the internal voltage to one of the internal voltage terminals. | 09-29-2011 |
20110234195 | CONTROL CIRCUIT and ELECTRONIC DEVICE - A controller includes a difference detector that detects a difference between a switching timing of a first channel of a switching power supply including a plurality of channels, and a switching timing of a second channel of the switching power supply, the plurality of channels being coupled in common to an input power supply and performing switching operations in response to clock signals, and a timing adjuster that, based on a detection result of the difference detector, increases a difference between a timing of a clock signal supplied to the first channel and a timing of a clock signal supplied to the second channel when the difference between the switching timing of the first channel and the switching timing of the second channel is smaller than a first value. | 09-29-2011 |
20110234196 | VOLTAGE CONVERTER - There is provided a voltage converter capable of reliably preventing malfunctions of an electronic circuit to stably maintain an accurate operation by suppressing high-frequency noise generated on an input side. A DC-DC converter | 09-29-2011 |
20110248697 | Semiconductor device and data processing system - A semiconductor device comprises a first circuit outputting a signal to a first signal line, a first FET applied with a driving signal and having a gate electrode connected to a first node, a second FET controlling an electrical connection between the first signal line and the first node, a third FET amplifying a signal of the first node, a second circuit precharging the first signal line, and a voltage control circuit. A gate capacitance of the first FET is controlled in response to a voltage difference between the first node and the driving signal. The voltage control circuit shifts a potential of the driving signal when the second FET is non-conductive after the signal of the first-circuit is transmitted to the first node, and performs an offset control for the driving signal so as to compensate a variation of a threshold voltage of the first FET. | 10-13-2011 |
20110254528 | MULTI-MODULE BIDIRECTIONAL DC-DC CONVERTER - A multi-module bidirectional power converter may comprise a low side common node, a high side common node and at least first and second bidirectional DC/DC converter modules. The modules may comprise first and second low voltage switches, first and second high voltage switches and a transformer. The transformer may comprise a low side winding having first and second legs and a high side winding having first and second legs. The first leg of the low side winding may be connected with the first and second low voltage switches of the module. The second leg of the low side winding may be connected with the low side common node of the multi-module bidirectional power converter. The first leg of the high side winding may be connected with the first and second high voltage switches of the module. The second leg of the high side winding may be connected to the high side common node of the multi-module bidirectional power converter. Such an arrangement may provide operability of the multi-module bidirectional power converter with any one or more of the modules so that efficiency is maintained when electrical loads are high and so that Zero Voltage Switching is maintained when electrical loads are low. | 10-20-2011 |
20110254529 | VOLTAGE CONVERTER - A voltage converter comprises at least two capacitive charge pump stages, each comprising a capacitor, a charging switch through which a capacitor charging current is adapted to flow, and a control circuit for controlling the charging switch.
| 10-20-2011 |
20110260706 | Power Supply Apparatus - To provide a power supply apparatus that can supply a large current and a small current to a load circuit in a switchable manner, with a minimum circuit scale and an efficient use of electronic devices and elements contained in conventionally used power supply apparatuses. The power supply apparatus | 10-27-2011 |
20110260707 | POWER SEMICONDUCTOR DEVICE - A power semiconductor device comprises: high side and low side switching elements; high side and low side drive circuits; a bootstrap capacitor supplying a drive voltage to the high side drive circuit and having a first terminal connected to a connection point between the high side switching element and the low side switching element and a second terminal connected to a power supply terminal of the high side drive circuit; a bootstrap diode having an anode connected to a power supply and a cathode connected to the second terminal and supplying a current from the power supply to the second terminal; a floating power supply; and a bootstrap compensation circuit supplying a current from the floating power supply to the second terminal, when the high side drive circuit turns ON the high side switching element and the low side drive circuit turns OFF the low side switching element. | 10-27-2011 |
20110273159 | POWER CONVERSION CIRCUIT - A power conversion circuit includes a high side switching device connected at its collector to the high potential side of a power supply, a low side switching device connected at its emitter to the low potential side of the power supply, a first junction to which the emitter of the high side switching device and the collector of the low side switching device are connected, a first diode connected at its cathode to the collector of the high side switching device, a second diode connected at its anode to the emitter of the low side switching device, a second junction to which the anode of the first diode and the cathode of the second diode are connected, an inductance connected between the first and second junctions, and a snubber circuit connected to the first junction and adapted to absorb stored energy in the inductance when a freewheeling current flows. | 11-10-2011 |
20110279105 | MICROCOMPUTER AND SWITCHING POWER SUPPLY DEVICE - The present invention provides a switching power supply device that is capable of steadily operating even when a low supply voltage is employed. The present invention also provides a microcomputer equipped with the switching power supply device. A switching regulator includes an inductor that inputs an external supply voltage at one end, a main switch that is coupled to another end of the inductor, an auxiliary switch that is coupled to the other end of the inductor in parallel with the main switch, and a rectifying/smoothing circuit having a diode and a capacitor. A switching operation of the main switch is controlled by a control signal generated from a PFM control circuit, which is driven by an internal supply voltage. A switching operation of the auxiliary switch is controlled by a control signal generated from a ring oscillator, which is driven by the external supply voltage. | 11-17-2011 |
20110291636 | VOLTAGE REGULATOR - Provided is a voltage regulator capable of stable operation under a light load so as to cover a wide range of load capacitances. The voltage regulator includes a circuit for charging a phase compensation capacitor for the voltage regulator, and a zero due to a resistor ( | 12-01-2011 |
20110291637 | INCREASING THE EFFICIENCY OF A DC-DC CONVERTER - A DC-DC converter receives input power from a power source and generates a regulated DC voltage as an output. The DC-DC converter contains multiple blocks, each of which is powered by a power supply received on a supply terminal. The DC-DC converter also contains a voltage regulator to generate a lower voltage from the power source. The lower voltage generated by the regulator is provided as the power supply on the supply terminal when the regulated DC voltage is less than a reference value, and the regulated DC voltage itself is provided as the power supply on the supply terminal otherwise. The regulator is switched off when the blocks are powered by the regulated DC voltage, thereby leading to increased efficiency of the DC-DC converter. | 12-01-2011 |
20110304310 | Multivibrator circuit and voltage converting circuit - The present disclosure provides a multivibrator circuit including: a first field effect transistor; a second field effect transistor; a first resistance; a second resistance; a third resistance; a fourth resistance; a first capacitor; a second capacitor; a diode-connected third field effect transistor; and a diode-connected fourth field effect transistor. | 12-15-2011 |
20110304311 | DC/DC CONVERTER, POWER SUPPLY CIRCUIT, AND SEMICONDUCTOR DEVICE - Provided is a DC-DC converter with improved power conversion efficiency. A transistor which is incorporated in the DC-DC converter and functions as a switching element for controlling output power includes, in its channel formation region, a semiconductor material having a wide band gap and significantly small off current compared with silicon. The transistor further comprises a back gate electrode, in addition to a general gate electrode, and a back gate control circuit for controlling a potential applied to the back gate electrode in accordance with the output power from the DC-DC converter. The control of the potential applied to the back gate electrode by the back gate control circuit enables the threshold voltage to decrease the on-state resistance when the output power is high and to increase the off-state current when the output power is low. | 12-15-2011 |
20110309814 | USE OF AUXILIARY CURRENTS FOR VOLTAGE REGULATION - One embodiment relates to an apparatus that includes at least one circuit block and a voltage source configured to supply a first voltage to the at least one circuit block. The apparatus also includes a power delivery unit configured to be selectively activated based on a whether a quantity of power is to be delivered from the power delivery unit to the circuit block. A control unit is configured to, upon a change in power consumption of the at least one circuit block, activate the auxiliary power delivery unit to deliver the quantity of power to the circuit block. The auxiliary power delivery unit can quickly supply large currents since it does not necessarily rely on slow control loops using voltage sensing. Rather, the auxiliary power delivery unit often delivers pre-calculated current profiles to respond to the timing characteristic of the change of power consumption and of the voltage regulator. | 12-22-2011 |
20110309815 | POWER CONVERTER AND METHOD OF POWER CONVERSION - A power converter includes a power converting unit and a driving circuit. The power converting unit generates a DC output voltage based on a pull up driving signal, a pull down driving signal, and a DC input voltage. The driving circuit compensates for an inductor peak current, and performs in a pulse-frequency-modulation (PFM) mode and a pulse-width-modulation (PWM) mode to generate the pull-up driving signal and the pull-down driving signal based on the DC output voltage and the compensated inductor peak current. The power converter performs a mode transition between the PFM and PWM modes at a uniform load current, even when a magnitude of the DC output voltage varies. | 12-22-2011 |
20110309816 | AC VOLTAGE CONTROLLER - An AC voltage controller has two transistors which can be positioned between two AC voltage terminals in series with a load. The two transistors are connected in series in such a way that their respective source terminals are connected to one another. The AC voltage controller also contains a signal generator for generating a switching signal for actuating the two transistors, a buffer which is connected downstream of the signal generator and which is set by the signal generator in order to actuate the two transistors. An actuation circuit or driver circuit is connected downstream of the buffer, for the purpose of actuating the two transistors in accordance with the set state of the buffer. A current-limiting circuit is provided for limiting or switching off the current through the two transistors in the case of an excessively large current through the load. | 12-22-2011 |
20120001612 | Four-switch step-down storageless converter - A four-switch step-down storageless DC-DC converter is provided having simultaneously ultra high efficiency of over 99% in an ultra compact size, while also providing a regulation and maintaining fast transient response while in regulation. Because of its storageless feature it is ideal for demanding computer applications, such as VRM (Voltage Regulator Modules), with extremely fast step-load load current change requirements and tight output voltage regulation requiring ultra low output ripple voltages during the transients. | 01-05-2012 |
20120019230 | DC/DC CONVERTER CIRCUIT AND METHOD FOR CONTROLLING A DC/DC CONVERTER CIRCUIT - A DC/DC converter circuit to be used in the field of MPPT for solar inverters, for step-up DC/DC conversion for high output voltages, and for chargers in electrical vehicles. The circuit comprises a first DC terminal and a second DC terminal, a first DC voltage being defined there between. It further comprises a positive split DC terminal and a midpoint terminal, a positive split DC voltage being defined there between. A negative split DC terminal is provided, a negative split DC voltage being defined between said negative split DC terminal and said midpoint terminal. A first switch and a second switch are provided, and a converter inductance is storing electric energy therein. A first diode is connected between a first terminal of said first switch and said positive split DC terminal, and a second diode is coupled between an internal midpoint and said midpoint terminal. | 01-26-2012 |
20120032664 | SINGLE INDUCTOR POWER CONVERTER SYSTEM AND METHODS - Methods, systems, and devices are described for a non-isolated dc-dc power converter that uses a single magnetic element and provides both a positive and a negative voltage output. The magnetic element, such as an inductor, is coupled with two or more switching modules that electrically switch the inductor to and from a voltage source, an inductor terminal, and/or a load. By electrically connecting and electrically isolating different components at various times, separate positive and negative voltage outputs are provided using the single inductor element. Switching may be controlled by a controller module, and a magnitude of the dc output voltage may be selected based on two or more resistors coupled with the controller module. | 02-09-2012 |
20120038344 | Low-Noise High Efficiency Bias Generation Circuits and Method - Embodiments of signal bias generators and regulators are described generally herein. Other embodiments may be described and claimed. | 02-16-2012 |
20120068681 | Integrated Circuit Package With Reduced Parasitic Loop Inductance - A multi-layer integrated circuit package includes a switched-mode power supply circuit including a plurality of transistors which form part of a main current loop of the switched-mode power supply circuit. The plurality of transistors are arranged in one or more layers of the integrated circuit package. The package further includes a conductive plate arranged in a different layer of the integrated circuit package than the plurality of transistors. The conductive plate is in close enough proximity to at least part of the main current loop so that a current can be electromagnetically induced in the conductive plate responsive to a change in current in the main current loop. | 03-22-2012 |
20120068682 | DC TO DC VOLTAGE CONVERTER COMPRISING A CHARGE PUMP CAPACITOR - The invention relates to a DC to DC voltage converter including a charge pump capacitor (C) installed parallel to a means ( | 03-22-2012 |
20120068683 | Current Source Gate Driver with Negative Gate Voltage - Described herein are methods and circuits for driving a power switching device of a power converter. The methods and circuits include providing a negative gate to source voltage to the power switching device during an off transition of the power switching device, wherein the negative gate to source voltage is provided independent of one or more switching element for driving the power switching device; wherein body diode conduction by the one or more switching element is mitigated; wherein a circuit connected in parallel with the gate and source of the power switching device is used to set or define the negative gate to source voltage. | 03-22-2012 |
20120068684 | CURRENT GENERATOR, NOTABLY FOR CURRENT OF THE ORDER OF NANO-AMPERES, AND VOLTAGE REGULATOR USING SUCH A GENERATOR - An ultra-low current generator and a voltage regulator using such a generator. The generator includes a first set of Q transistors connected as a current mirror and able to be linked to a supply voltage; a second set of Q−1 transistors connected as a current mirror and each connected in series to one of the transistors in the first set of transistors; a first transistor connected in series with a transistor in the second set of transistors; and a second transistor, connected as a current mirror with the first transistor, and connected in series with a transistor included in the first set of transistors. The first transistor operates in its linear zone, a value of a current generated by the current generator depends on an equivalent resistance of the first transistor, and the first and second transistors have ultra-long channels, with a very large length/width ratio. | 03-22-2012 |
20120074920 | POWER CONVERTER CIRCUITS INCLUDING HIGH ELECTRON MOBILITY TRANSISTORS FOR SWITCHING AND RECTIFCATION - A power converter circuit includes a storage component, a rectifier component comprising a first field effect transistor and having first and second bias states, and a switch including a second field effect transistor having first and second operational states. The first and second field effect transistors are High Electron Mobility Transistors (HEMTs). | 03-29-2012 |
20120074921 | AREA-EFFICIENT VOLTAGE REGULATORS - Area-efficient voltage regulators are provided in which a first transistor has a first breakdown voltage and a first on-state resistance and a second transistor has a second breakdown voltage that exceeds the first breakdown voltage and a second on-state resistance that exceeds the first on-state resistance. With this arrangement, the second transistor can be biased to raise an output voltage. When the difference between an input voltage and the output voltage is less than a predetermined voltage, the second transistor is disabled and the first transistor is controlled to provide the output voltage at a wherein the controlling is preferably performed with a feedback control loop. The die area of the first transistor can be reduced because its on-state breakdown need only exceed the predetermined voltage rather than the substantially-higher input voltage. Because of the reduced on-state breakdown, the die area of the first transistor can be reduced and still obtain a low on-state resistance r | 03-29-2012 |
20120081098 | METHOD AND APPARATUS FOR SIMPLIFYING THE CONTROL OF A SWITCH - A circuit for use in a half bridge converter includes a high side switch coupled between a positive input terminal and a first terminal of a primary transformer winding. A low side switch is coupled between a negative input terminal and the first terminal. A first control circuit is coupled to the high side switch to sense a slope of a voltage across the high side switch while the high side switch is off to control the high side switch in response to the sensed slope across the high side switch. A second control circuit is coupled to the low side switch to sense a slope of a voltage across the low side switch while the low side switch is off to control the low side switch in response to the sensed slope of the voltage across the low side switch. | 04-05-2012 |
20120086425 | METHODS AND APPARATUS FOR RESISTIVE VOLTAGE SENSING IN AN ISOLATED POWER DISTRIBUTION UNIT - Methods and apparatus provide for a primary side circuit including one or more voltage nodes; and a monitoring circuit operating to monitor one or more parameters of the primary side circuit, and including at least one sensing circuit and at least one processing circuit within a secondary side circuit, where the sensing circuit includes a resistor network having an input for receiving a first sensed voltage from a first of the voltage nodes of the primary side circuit, traversing an isolation boundary between the primary side circuit and the secondary side circuit while adhering to a safety specification, which includes a primary-secondary isolation requirement, and having an output for providing a first modified sensed voltage to the processing circuit. | 04-12-2012 |
20120086426 | SINGLE-INDUCTOR MULTIPLE-OUTPUT POWER SUPPLY WITH DEFAULT PATH - The disclosed embodiments relate to a power supply for a portable electronic device. This power supply includes a power source, an inductor, a control circuit, and an input switch that couples the input terminal of the inductor to either the power source or a reference voltage. The power supply also includes a first output path that produces a first output voltage and a second output path that produces a second output voltage. The first output path includes a first diode coupled between the output terminal of the inductor and the first output voltage, and a first output capacitor coupled between the first output voltage and the reference voltage. The second output path includes a second diode and an output switch coupled between the output terminal and the second output voltage, and a second output capacitor coupled between the second output voltage and the reference voltage. | 04-12-2012 |
20120086427 | ALTERNATING CURRENT/DIRECT CURRENT TWO-WAY SWITCH - There is provided an AC/DC two-way switch connected between an AC power source or a DC power source and a load to control a power supply to the load. The AC/DC two-way switch includes: a bi-directional semiconductor switch element having a transistor structure connected in series between a power source and the load; a rectifying unit connected in parallel between the first input terminal and a second input terminal; a power source unit for converting an output voltage from the rectifying unit into a stable voltage; and a controller for controlling an entire operation of the AC/DC two-way switch. The AC/DC two-way switch further includes a driving unit for turning on the bi-directional semiconductor switch element in response to a control signal. | 04-12-2012 |
20120091985 | High Voltage Output Driver - An output driver circuit is provided. In accordance with various example embodiments, an output driver circuit includes a high-side driver circuit having transistors coupled in anti-series between a power source and an output node, and a low-side driver circuit having transistors coupled in anti-series between the output node and ground. For each transistor, a diode is connected between the source and drain of the transistor, with the diodes of the respective high-side and low-side circuits being arranged to prevent/mitigate the flow of current in opposite directions. | 04-19-2012 |
20120091986 | SEMICONDUCTOR DEVICE AND POWER SUPPLY APPARATUS - A semiconductor device includes a first transistor including a GaN-based semiconductor stacked structure formed over a substrate, a first gate electrode having a plurality of first fingers over the semiconductor stacked structure, a plurality of first drain electrodes provided along the first fingers, and a plurality of first source electrodes provided along the first fingers; a second transistor including the semiconductor stacked structure, a second gate electrode having a plurality of second fingers over the semiconductor stacked structure, the second drain electrodes provided along the second fingers, and a plurality of second source electrodes provided along the second fingers; a drain pad provided over or under the first drain electrodes, and coupled to the first drain electrodes; a source pad provided over or under the second source electrodes, and coupled to the second source electrodes; and a common pad coupled to the first source electrodes and the second drain electrodes. | 04-19-2012 |
20120091987 | SYSTEM FOR SUPPLYING ELECTRICAL ENERGY - In a system for providing electrical energy for an electronic circuit adapted to supply power to a load, one terminal for a power supply voltage of the circuit is connected to a positive pole of an energy source, and one terminal for ground for the circuit is connected to a negative pole of the energy source via a rectifying electronic component, and a capacitor is connected between the two terminals of the circuit for partial supply of the circuit with electrical energy. | 04-19-2012 |
20120098517 | High Side Switch Circuit, Interface Circuit and Electronic Device - A high side switch circuit includes a switch electrically connected between input and output terminals, a gate control unit, and an over-current sensor unit. The over-current sensor unit includes a resistive element and a comparator. The comparator senses an over-current if a voltage of the resistive element exceeds a threshold voltage. The comparator is adjusted in advance such that the detected voltage at the time of over-current exceeds the threshold voltage. Even if accuracy of resistance value of the resistive element is not high, accuracy of detecting over-current can be improved by adjusting the comparator. | 04-26-2012 |
20120105045 | Controlling a Skew Time of Switches of a Switching Regulator - Embodiments for methods and apparatuses for controlling a skew time of switches of a switching voltage regulator are disclosed. One method includes generating a switching voltage through closing and opening of a series switch and a shunt switch as controlled by a series switch control signal and a shunt switch control signal. An error signal is generated that is proportional to a relative displacement of an on-interval of the series switch and an off-interval of the shunt switch. A relative delay of the series switch control signal and the shunt switch control signal is adjusted based on the error signal, and a regulated output voltage is generated based upon the switching voltage. | 05-03-2012 |
20120112728 | REDUCED PARTS COUNT ISOLATED AC CURRENT SWITCHING AND SENSING - An appliance's control and sensing circuit selectively applies AC electrical power to a load ( | 05-10-2012 |
20120119723 | VOLTAGE CONVERSION APPARATUS AND ELECTRICAL LOAD DRIVING APPARATUS - A voltage conversion apparatus is disclosed in which a current passes through first and second loop circuits alternately in accordance with ON/OFF operation of a first switching element provided in the first circuit. The direction of a magnetic field through the first loop circuit formed at the ON operation is the same as a direction of a magnetic field through the second loop circuit formed at the OFF operation. The first loop circuit and the second loop circuit are provided on opposite sides of a printed circuit board, respectively, in such a manner that the first loop circuit and the second loop circuit are opposed to each other. A heat sink is provided on a surface of the printed circuit board. A solid pattern of a metal material is provided on an inner layer of the printed circuit board to be connected to the heat sink via a through hole. | 05-17-2012 |
20120126777 | DC-DC CONVERTER CIRCUIT - A DC-DC converter circuit includes first to sixth semiconductor switches and an inductor. The first to third semiconductor switches are connected to one end of the inductor. The fourth to sixth semiconductor switches are connected to the other end of the inductor. A first voltage supply is connected to opposite ends of the first and fourth semiconductor switches from the ends of the first and fourth semiconductor switches connected to the inductor. A second voltage supply is connected to opposite ends of the second and fifth semiconductor switches from the ends of the second and fifth semiconductor switches connected to the inductor. The first voltage supply and the second voltage supply are both connected to opposite ends of the third and sixth semiconductor switches from the ends of the third and sixth semiconductor switches connected to the inductor. | 05-24-2012 |
20120126778 | Charge Pump Circuit with Pulse-Width Modulation - Each switching element of a charge pump circuit of a voltage regulator comprises a relatively small-sized MOS transistor associated with a relatively large-sized MOS transistor connected in parallel. Only the small transistors are switched in a first mode of operation, while the large transistors are switched in a second mode of operation. In this manner the switching losses in the first mode of operation can be decreased. | 05-24-2012 |
20120133351 | SWITCHING POWER SOURCE - A switching power source according to one embodiment includes a first transistor and a second transistor. The first transistor is connected to a positive electrode of a DC voltage source. The second transistor is connected between the first transistor and a negative electrode of the DC voltage source. The first transistor and the second transistor are alternately placed in conducting state. A gate signal is applied to a gate terminal of the first transistor with reference to a voltage of a terminal of the first transistor that is connected to the positive electrode. A gate signal is applied to a gate terminal of the second transistor with reference to a voltage of a terminal of the second transistor that is connected to the negative electrode. The first transistor and the second transistor are configured with wide bandgap semiconductors of mutually different materials, respectively. | 05-31-2012 |
20120139521 | DC-DC Converter - A DC-DC converter having a first and a second switch, an input diode, a magnetizing inductor, a resonant capacitor, a resonant inductor, an output diode and an output filter capacitor. The first and second switches are turned on alternatively. When the first switch is turned on, an input voltage is coupled to an anode of the input diode that has a cathode coupled to a first terminal of the magnetizing inductor. The second switch is designed to short a second terminal of the magnetizing inductor to a ground. The resonant capacitor and inductor, which are coupled in series, are disposed between the second terminal of the magnetizing inductor and the ground. A connection node between the resonant capacitor and inductor is coupled to the output filter capacitor, via the output diode, to regulate a voltage of the output filter capacitor. The regulated voltage is used in powering a load. | 06-07-2012 |
20120139522 | CONVERTER CONTROLLER - There is disclosed a converter controller which can simply and early detect an abnormality of an auxiliary circuit constituting a soft switching converter. On turning off a first switching element, a controller detects a voltage between both the ends of a snubber capacitor and a voltage between both the ends of the first switching element, to obtain a difference voltage. The controller compares the obtained difference voltage with a voltage threshold value stored in a memory (not shown) to judge whether or not the difference voltage is larger than the voltage threshold value. When the difference voltage is smaller than the voltage threshold value, the controller judges that an auxiliary circuit is normal, to end processing, whereas when the difference voltage is not less than the voltage threshold value, the controller judges that a failure (an open failure) occurs in the auxiliary circuit, to shift to a fail safe operation, thereby ending the processing. | 06-07-2012 |
20120146612 | VOLTAGE STABILIZING CIRCUIT - A voltage stabilizing circuit including an input port, an output port, a transistor, a diode, a three-terminal voltage regulating reference source, a first resistor, and a second resistor. The transistor has a collector terminal and an emitter terminal connected to the input port and the output port, respectively. The diode has an anode connected to the input port and a base terminal of the transistor. The three-terminal voltage regulating reference source has an anode connected to ground, a cathode connected to the input port and a cathode of the diode, and a reference terminal The first resistor is connected between the cathode of the diode and the reference terminal of the three-terminal voltage regulating reference source. The second resistor is connected between ground and the reference terminal of the three-terminal voltage regulating reference source. | 06-14-2012 |
20120146613 | INTEGRATED CIRCUIT-BASED DRIVE CIRCUIT FOR DRIVING VOLTAGE-CONTROLLED SWITCHING DEVICE AND METHOD OF MANUFACTURING THE DRIVE CIRCUIT - A drive circuit supplies a charging current via a charging path to drive the control terminal of a voltage-controlled switching device, with a resistor and a switching device being connected in series in the charging path. A control circuit in an integrated circuit of the drive circuit operates an internal switching device such as to selectively enable/interrupt the charging current and to regulate the voltage drop across the resistor to a fixed value. The switching device connected in the charging path can be readily changed from the internal switching device to an external switching device, in accordance with the operating requirements of the driven switching device. | 06-14-2012 |
20120146614 | POWER SUPPLY CONTROLLER - If a power supply path is in an abnormal state, a power-supply-path protection circuit of a power supply controller inhibits a switching circuit that switches on/off power supply from a power source to a load from power supply, using data related to a protection-current temperature characteristic line set by a characteristic setting circuit. The protection-current temperature characteristic line has a characteristic in which a protection current value is constant corresponding to increase in an ambient temperature or a negative characteristic in which the protection current value reduces corresponding to increase in the ambient temperature. Within a temperature range equal to or lower than an supposed maximum ambient temperature around the power-supply-path, the protection-current temperature characteristic line and a power-supply-path temperature characteristic line have a relation that the protection-current value is equal to or lower than an allowable current value at an identical ambient temperature. | 06-14-2012 |
20120153928 | POWER CONTROLLER SYSTEM - A power controller system configured to electrically supply a load via a circuit is provided. The system comprises, a switching device provided in an electrical pathway for supplying current to the load, a controller configured to open the switching device when a current through or voltage across the switching device exceeds a predetermined level; and an electrical pathway provided parallel to the load to enable load current to continue to flow through the parallel electrical pathway and the load when the switching device is open to dissipate inductive energy stored in the circuit connecting the parallel electrical pathway to the load. | 06-21-2012 |
20120153929 | DC-DC CONVERTER, MODULE, POWER SUPPLY DEVICE, AND ELECTRONIC APPARATUS - A controller CT | 06-21-2012 |
20120153930 | LOAD CONTROL DEVICE - A load control device includes: a main switching unit which has a main switch element connected in series to an AC power source and a load and controls the supply of power to the load; a manipulation switch that outputs a start-up signal for starting at least the load; a control unit which controls the opening and closing of the main switching unit; a first power source unit supplying a stable voltage to the control unit; and a second and a third power source unit each supplying power to the first power source unit. The load control device is characterized in that upon receiving the start-up signal, the control unit outputs an initial drive signal, for closing the main switch element, to the main switching unit before a power source supplying power to the first power source unit is switched from the second to the third power source unit. | 06-21-2012 |
20120169317 | DC-DC CONVERTER FOR LIQUID CRYSTAL DISPLAY DEVICE - A DC-DC converter of a liquid crystal display (LCD) apparatus is provided comprising a first capacitor connected between a first node and a second node, a second capacitor connected between a third node and a fourth node, and a first diode connected between the input terminal and the first node. | 07-05-2012 |
20120169318 | LOAD DRIVING DEVICE - The source of FET is connected to a battery voltage +V through a fuse, while the drain of FET is connected to an electric load. The gate of FET is connected to the connection node of a capacitor and a resistor of a serial circuit configured with the capacitor the resistor. The serial circuit is connected in series with FET. The source and drain of FET are connected to both ends of the capacitor. The gate of FET is connected to the connection node of resistors. The resistor is connected to FET. | 07-05-2012 |
20120176114 | POWER SUPPLY SYSTEM, CONTROLLER THEREFOR, AND METHOD OF MANUFACTURE OF CONTROLLER - A power supply system of the present invention aims to achieve optimization of the efficiency and therefore includes: z (z is a natural number equal to or larger than 2) power supplies (PS- | 07-12-2012 |
20120176115 | POWER SUPPLY CONTROLLER - The power supply controller performs the power-supply-path protection operation to restrict power supply through the switch element if a value of temperature increase of the power supply path W with respect to the reference temperature To exceeds the temperature threshold value and remove the restriction if the temperature decreases to the temperature threshold value or lower. And the controller performs the switch protection operation to restrict the power supply through the switch element if the value of the flowing current exceeds the current threshold value and remove the restriction after the reference time H elapses. And also the controller adds the additional value F to the value of temperature increase on condition that the value of the flowing current exceeds the current threshold value in the power supply protection operation and compares a post-addition temperature to the temperature threshold value. | 07-12-2012 |
20120182005 | VOLTAGE CONTROL DEVICE FOR A FUEL CELL - The invention relates to a device for controlling the voltage of a cell of a fuel cell, characterized in that said control device comprises a first transistor (Q | 07-19-2012 |
20120187934 | DC-DC CONVERTER - A DC-DC converter includes: a high-side MOSFET as a main switching element which is driven by using a bootstrap capacitor; a low-side MOSFET as a synchronous rectifier, wherein a series circuit of the high-side MOSFET and the low-side MOSFET is connected to a DC power supply; and a coil and a smoothing capacitor, which are serially connected between the drain and the source of the low-side MOSFET; an overvoltage protection unit, which clamps an overvoltage; an overcurrent interrupting unit, which interrupts an overcurrent that flows when the overvoltage protection unit clamps the overvoltage; and a protection circuit, wherein the protection circuit includes: a differential-voltage detecting unit detecting the voltage of both ends of the bootstrap capacitor; and a control unit that, when the voltage detected by the differential-voltage detecting unit exceeds a predetermined value, turns OFF the low-side MOSFET and turns ON the high-side MOSFET. | 07-26-2012 |
20120194163 | Reverse Power Y-Adapter - A power Y-adapter provides power at a high voltage to an output end from at least two input ends to which power of a lower voltage and a phase difference is provided and includes a first polarity sensitive current isolation device, a second polarity sensitive current isolation device, a control section, and an output section. When the voltage signals supplied to the hot wire terminals of the first input connector and the second input connector sufficiently are out of phase, the Y-adapter can produce a voltage of higher magnitude between the first and the second hot wire terminals of the output connector. | 08-02-2012 |
20120200281 | Three-Dimensional Power Supply Module Having Reduced Switch Node Ringing - A high frequency power supply module ( | 08-09-2012 |
20120200282 | CHIP ELECTRONIC COMPONENT, MOUNTED STRUCTURE OF CHIP ELECTRONIC COMPONENT, AND SWITCHING SUPPLY CIRCUIT - A chip electronic component is provided with an element body containing a ferrite material; a first terminal electrode, a second terminal electrode, and a third terminal electrode arranged on the surface of the element body; and an internal conductor electrically connected to the first terminal electrode, the second terminal electrode, and the third terminal electrode. The impedance of a current path through the internal conductor between the first terminal electrode and the second terminal electrode is different from that of a current path through the internal conductor between the first terminal electrode and the third terminal electrode. | 08-09-2012 |
20120206122 | CONSTANT OFF TIME BOOST CONVERTER - This document discusses, among other things, apparatus and methods for operating a voltage converter. In an example, a circuit for controlling a converter can include a comparator configured to receive an off-time charge voltage and an off-time threshold and to initiate a transition of a power transistor from an off-time state to an on-time state when the off-time charge voltage exceeds the off-time threshold, and a capacitor coupled to the comparator and configured to receive a voltage from an inductor in the off-time state and to provide the off-time charge voltage using the voltage from the inductor. | 08-16-2012 |
20120217949 | DC VOLTAGE BOOSTER APPARATUS - A DC voltage booster apparatus includes a booster coil, a first capacitor, a switching device, and a second capacitor. The booster coil includes a first end and a second end. The first end of the booster coil is connected to a DC power supply source. The second end of the booster coil is connected to a rectifier diode. The first capacitor is connected between the rectifier diode and a ground. The first capacitor includes a smoothing capacitor. The switching device is disposed between the second end of the booster coil and the ground. The second capacitor is connected in parallel with the rectifier diode. | 08-30-2012 |
20120229116 | VOLTAGE REGULATOR - According to one embodiment, a voltage regulator includes an output transistor, a voltage detector, a controller, and a discharge circuit. The output transistor is connected between a power supply terminal and an output terminal. The voltage detector is connected between the output terminal and a ground terminal. The voltage detector is configured to divide an output voltage between the output terminal and the ground terminal according to an inputted voltage switching signal and generates a first voltage on the ground terminal side and a second voltage having a polarity the same as a polarity of the first voltage and having an absolute value lower than or equal to an absolute value of the first voltage. The controller is configured to detect a difference between the first voltage and a reference voltage and control the output transistor. | 09-13-2012 |
20120235663 | SEMICONDUCTOR DEVICE INCLUDING A CIRCUIT TO COMPENSATE FOR PARASITIC INDUCTANCE - A semiconductor device includes a first transistor, a second transistor coupled in parallel with the first transistor, and a first parasitic inductance between an emitter of the first transistor and an emitter of the second transistor. The semiconductor device includes a first circuit configured to provide a first gate driver signal to the first transistor based on a common driver signal and a second circuit configured to provide a second gate driver signal to the second transistor based on the common driver signal. The first circuit and the second circuit are configured to compensate for a voltage drop across the first parasitic inductance such that the first gate driver signal and the second gate driver signal are in phase with and at the same magnitude as the common driver signal. | 09-20-2012 |
20120235664 | VOLTAGE CONVERTERS WITH REDUCED OUTPUT FREQUENCY VARIATIONS AND ASSOCIATED METHODS - Switch-mode voltage converters and associated methods are disclosed herein. In one embodiment, a switch-mode voltage converter includes a switching transistor coupled between an input voltage (V | 09-20-2012 |
20120235665 | METHOD FOR OBTAINING INFORMATION ENABLING THE DETERMINATION OF A CHARACTERISTIC OF A POWER SOURCE - The present invention concerns an apparatus for obtaining information enabling the determination of a characteristic like the maximum power point of a power source, characterised in that the apparatus for obtaining information enabling the determination of the characteristic of the power source comprises means for monitoring the voltage on an inductor linked to the power source in order to obtain information enabling the determination of the characteristic of the power source. | 09-20-2012 |
20120242316 | VOLTAGE REGULATOR - Provided is a voltage regulator capable of preventing a large current from flowing even when a battery ( | 09-27-2012 |
20120249111 | Cascade-Connected Boost Circuit - A cascade-connected boost circuit is disclosed. The cascade-connected boost circuit includes a first-stage boost circuit, a second-stage boost circuit, an output terminal and a regulation filtering capacitor. The first-stage boost circuit includes an input terminal, a PWM generator, a first inductor and a first switch. The second-stage boost circuit includes a second inductor and a second switch. The PWM generator controls the first switch and the second switch to turn on or turn off simultaneously. A power supply from the input terminal respectively charges the two inductors via two paths when the two switches are turned on. The two inductors release energy when the two switches are turned off. The two switches share the voltage of the output terminal. The cascade-connected boost circuit according to the present invention solves the issues that the withstand voltage limit of a single switch and the limit of a duty cycle. | 10-04-2012 |
20120249112 | CONTROLLER FOR SWITCH MODE POWER SUPPLY - A switched mode power supply (SMPS) controller is disclosed. The controller comprises a monitoring circuit adapted to monitor the rate of change of a voltage at an input ( | 10-04-2012 |
20120249113 | METHOD FOR OPERATING A DIRECT CONVERTER CIRCUIT AND DEVICE TO CARRY OUT THE METHOD - A method and device for operating a direct converter circuit are provided. A control signal controls power semiconductor switches of switching cells of the associated phase module. The control signal is formed, for each phase module, from the difference between a reference signal relating to the voltage over the phase module and a voltage signal over the inductor. The voltage signal over the inductor is formed from a reference signal relating to the current through the corresponding phase module. The reference signal relating to the current through the phase module is formed from a respective mean value or instantaneous value of a phase power of a phase of the first and second current or voltage systems connected to the phase module and from respective sums of the instantaneous values or the mean values of the phase powers of the phases of the first and second current or voltage systems, respectively. | 10-04-2012 |
20120256612 | System For The Electronic Management Of Photovoltaic Cells With Adapted Thresholds - The invention relates to a system for the electronic management of a photovoltaic generator, said system comprising a plurality of n static converters ( | 10-11-2012 |
20120262144 | BOOTSTRAP STARTUP AND ASSIST CIRCUIT - A bootstrap assist circuit and a startup circuit comprising a voltage controlled switch and a startup ramp voltage generator connected to the voltage controlled switch that will control a high side switch, a dimming interface or an enable/disable input function. Said system is used to provide a bootstrap technique to continuously switch a floating high side switch (MOSFET) by continuously charging a capacitor and then “level shifting” said capacitor voltage across the gate and source of the said high side switch to turn the switch on. | 10-18-2012 |
20120262145 | POWER-SUPPLY MODULE - A power-supply module includes at least one power-supply component, an inductor and a package. The inductor is disposed over the at least one power-supply components, and the at least a power-supply component and the inductor are disposed within the package. Besides, the power-supply module further comprises a printed circuit board, and the at least one power-supply component and the inductor are mounted to the printed circuit board. Moreover, the inductor comprises a plurality of leads that support the inductor over the at least one power-supply component. | 10-18-2012 |
20120268099 | HVDC POWER TRANSMISSION WITH CABLE FAULT RIDE-THROUGH CAPABILITY - A high voltage direct current (HVDC) power transmission system includes a cable fault ride-through system. The cable fault ride-through system is configured to ensure the HVDC power transmission system remains operational via an earth path between the power source end and the load end during a transmission cable fault, even in the absence of a neutral bus and/or dc circuit breakers. | 10-25-2012 |
20120274304 | Low-Voltage-Driven Boost Circuit and Associated Method - A low-voltage-driven boost circuit is provided. The boost circuit includes an inductor, a diode, a capacitor, a first switch and a second switch. The second switch is coupled between the first switch and an anode of the diode. The first switch selectively conducts according to a switch signal, and the second switch conducts as the first switch conducts. | 11-01-2012 |
20120274305 | Voltage Regulator and Voltage-Regulator-Equipped Oscillation Circuit - A voltage regulator comprises an N type depletion MOS transistor having a drain connected to the positive electrode side of a power supply, a source connected to a stabilizing capacitor, and a gate receiving a constant reference voltage, and has an output terminal at the source of the N type depletion MOS transistor. In this simple circuit configuration, the voltage regulator can markedly reduce a noise carried on an output voltage. | 11-01-2012 |
20120280674 | SNUBBER CIRCUIT - A snubber circuit comprises a first energy storage device and circuitry coupled to the first energy storage device to facilitate capturing, by the first energy storage device, energy of a switching circuit. The snubber circuit also comprises a second energy storage device coupled to the first energy storage device to store the captured energy. The circuitry additionally facilitates resetting of the first energy storage device. | 11-08-2012 |
20120293151 | COMPLEMENTARY METAL-OXIDE SEMICONDUCTOR DIRECT CURRENT TO DIRECT CURRENT CONVERTER - Disclosed embodiments include a direct current to direct current (DC-DC) converter including one or more charge pumps and configured to receive an input voltage and a first clock signal and a second clock signal. The first clock signal and second clock signal may be non-overlapping, and each may alternate between a ground voltage and a first voltage. The DC-DC converter may be configured to produce an output voltage over the clock cycle that has a negative polarity with a magnitude substantially equal to a sum of magnitudes of the input voltage and an integer multiple of the first voltage, the integer multiple being equal to a number of the one or more charge pumps in the DC-DC converter. | 11-22-2012 |
20120293152 | Boost Converter - A boost converter is disclosed in the present disclosure. The boost converter includes a switching element, a first diode, a second diode, a first inductor, a second inductor, a DC voltage input terminal and a DC voltage output terminal. The first inductor, the second inductor and the second diode are connected in sequence between the DC voltage input terminal and the DC voltage output terminal. The second diode has an anode connected to the second inductor and a cathode connected to the DC voltage output terminal. The switching element includes a first end, a second end and a third end for controlling connection or disconnection between the first end and the second end. The first end is connected between the first and the second inductor. The boost converter of the present disclosure is convenient to use and features high inductance coupling efficiency. | 11-22-2012 |
20120293153 | ELECTRIC POWER SUPPLY AND RELATED METHODS - Some embodiments include an improved electric power supply. Other embodiments of related systems and methods are disclosed. | 11-22-2012 |
20120306469 | VOLTAGE REGULATOR - A voltage regulator includes: a normally-on first transistor coupled to an input voltage; an inductor provided between the first transistor and an output terminal; a return circuit provided between a reference voltage and a connection node of the first transistor and the inductor; a drive circuit that supplies a drive signal to a gate of the first transistor; and a negative voltage generation circuit that is coupled to the reference voltage, generates a negative voltage on the basis of a pulse signal generated at the connection node by switching operation of the first transistor, and supplies the negative voltage to the drive circuit. | 12-06-2012 |
20120313611 | Self-Driven Synchronous Rectification Boost Converter Having High Step-Up Ratio - The present invention provides a self-driven synchronous rectification boost converter having high step-up ratio. The self-driven synchronous rectification boost converter having high step-up ratio has a first switch receiving a pulse driving signal, a first winding, a second winding and a synchronous rectification circuit constructed by an auxiliary winding and a second switch. The first winding inducts a reverse voltage when the first switch is repeatedly switched on and off. The reverse voltage then is raised via the second winding, and the auxiliary winding cooperates with a switch circuit to switch on/off the second switch according to an inducted voltage, so as to achieve an object of synchronous rectification. Under a condition of outputting high current, the present invention can greatly reduce power-consumption of rectifying and enhance efficiency. | 12-13-2012 |
20120313612 | SELF-OPTIMIZING ENERGY HARVESTER USING GENERATOR HAVING A VARIABLE SOURCE VOLTAGE - A self-optimizing energy harvester comprises a thermoelectric generator coupling to a thermal source, producing a source voltage greater than a minimum start-up voltage, where the thermoelectric generator drives a boost circuit and a feedforward circuit, delivering power to a load. A conventional boost circuit has a maximum output power only at the input voltage for which a fixed set point resistor is chosen. The feedforward circuit dynamically optimizes the boost circuit according to a dynamic set point resistance, thus increasing output power for a wide range of input voltages, relative to using a fixed reference resistor. The dynamic set point resistance is the sum of a variable resistance and a reference resistance. A sample element forms a differential voltage between the source and input voltage elements, and the variable resistance corresponds to the differential voltage. A reference resistor is chosen to establish the minimum start-up voltage. | 12-13-2012 |
20120313613 | HIGH VOLTAGE AND HIGH POWER BOOST CONVETER WITH CO-PACKAGED SCHOTTKY DIODE - A high voltage and high power boost converter is disclosed. The boost converter includes a boost converter IC and a discrete Schottky diode, both of which are co-packaged on a standard single common die pad. The bottom cathode is electrically connected to the common die pad. It is emphasized that this abstract is being provided to comply with rules requiring an abstract that will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. This abstract is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims. | 12-13-2012 |
20120313614 | SWITCHING POWER SUPPLY CIRCUIT, AND METHOD FOR CONTROL OF SWITCHING POWER SUPPLY CIRCUIT - A circuit includes a reactor, a diode, and a switching element. The reactor and the diode are connected in series with each other on a power supply line. The switching element is provided between a power supply line and a point between the reactor and the diode. A circuit includes a reactor, a diode, and a switching element. The reactor and the diode are connected in series with each other on a power supply line. The switching element is provided between the power supply line and a point between the reactor and the diode. Characteristics of at least any of the reactors, the switching elements, and the diodes are different from each other. | 12-13-2012 |
20120313615 | Summation Circuit in DC-DC Converter - An integrated circuit includes a saw-tooth generator including a saw tooth node configured to have a saw-tooth voltage generated thereon; and a first switch having a first end connected to the saw tooth node. The integrated circuit further includes a second switch coupled between an output node and an electrical ground, wherein the first switch and the second switch are configured to operate synchronously. A first current source is connected to the saw tooth node. A second current source is connected to the output node. | 12-13-2012 |
20120319670 | THRESHOLD VOLTAGE DETECTION CIRCUIT - A threshold voltage detection circuit comprises a first inverter, a first transistor, a second transistor, a third transistor and a fourth transistor. The first inverter comprises a first terminal and a second terminal, a first electrode of the first transistor is electrically connected with the second terminal of the first inverter, a fourth electrode of the second transistor is electrically connected with the first terminal of the first inverter, a seventh electrode of the third transistor is electrically connected with the second terminal of the first inverter and the first electrode of the first transistor, a tenth electrode of the fourth transistor is electrically connected with a third electrode of the first transistor and a fifth electrode of the second transistor, and an eleventh electrode of the fourth transistor is electrically connected with a ninth electrode of the third transistor. | 12-20-2012 |
20120319671 | POWER GENERATING CIRCUIT AND SWITCHING CIRCUIT - The power generating circuit includes: a first transistor having a control terminal to which a second control signal is applied and one end to which a first control signal is applied; and a second transistor having a control terminal to which the first control signal is applied and one end to which the second control signal is applied, wherein the other ends of the first transistor and the second transistor are connected to an output terminal. | 12-20-2012 |
20120319672 | METHOD FOR THE CLOSED-LOOP CONTROL OF A BUCK CONVERTER AND ARRANGEMENT FOR IMPLEMENTING THE METHOD - A method for regulating a buck converter, in which the amount of the output volume is adjusted via a controlled switching, comprising a pulse sequence showing a pulse rate and being pulse width modulated, of a conductivity, which is switched serially and drops over an output voltage, and an arrangement with a control input and with a control output, between which an analog-to-digital converter, a non-linear amplifier, an IIR filter, and a pulse width modulation circuit is switched, allow a quick reaction upon a load transient by which the regulation of the output voltage at a buck converter occurs faster and with less overshooting. This is attained such that the sample rate is adjusted greater than the pulse rate and the pulse values of the pulse sequence are controlled during the cycle duration. | 12-20-2012 |
20130002225 | Current-Mode Active Termination - Embodiments of the present invention, as further described below, provide active termination circuits that can be used with power transmitter circuits. Embodiments reduce power loss due to impedance matching and increase power efficiency in power transmitter circuits. In particular, embodiments provide active termination circuits that can be configured to draw minimal amounts of the output current generated by the power transmitter circuits. At the same time, embodiments achieve optimal impedance matching, thus enabling optimal power transfer to the load. Further, embodiments can be controlled adaptively in real time to reduce parasitic effects on power transfer and to optimize impedance matching. Embodiments can be implemented using various transistor technologies (e.g., MOSFET, BJT, etc.), and can be used with a variety of power transmitter circuits, including, for example, power DACs, analog/digital RF transmitters, and analog/digital PAs. | 01-03-2013 |
20130002226 | Switching regulator and control circuit thereof and input voltage detection method therefor - The present invention discloses a switching regulator including: a power stage having an upper gate device and a lower gate device coupled with each other, for converting an input voltage to an output voltage and generating a phase voltage at a node between the upper gate device and the lower gate device; and a control circuit including: a switch operation circuit controlling the power stage, the switch operation circuit generating a test signal turning on the upper gate device for a period of time and then turning it off; and a comparator for generating a ready signal indicating that the input voltage is ready according to comparison between the phase voltage and a reference voltage after the upper gate device is turned off. | 01-03-2013 |
20130002227 | POWER CONVERTER - A power converter has one set of two semiconductor switches performing switching actions, each of which is formed of an FET and a free wheel diode connected in anti-parallel to the FET, and a smoothing capacitor, and convers power by complementary switching actions of the FETs in the semiconductor switches. The power converter is provided with a current sensor that detects a direction of a current flowing through the semiconductor switches and a gate generation portion that skips ON signals of PWM gate signals of the semiconductor switches when the direction of the current flowing through the semiconductor switches is negative. | 01-03-2013 |
20130015833 | AUTOMATIC POWER CONVERTER BYPASSAANM George; Mark StevenAACI WilsonvilleAAST ORAACO USAAGP George; Mark Steven Wilsonville OR USAANM Bernards; Charles LawrenceAACI Lake OswegoAAST ORAACO USAAGP Bernards; Charles Lawrence Lake Oswego OR US - A power converter includes a bypass circuit connected in parallel with a power stage of the power converter. The bypass circuit provides a lower loss current path in parallel with the power stage when an input voltage of the power converter exceeds a predetermined threshold. The power converter may be a boost power converter used in a vehicle to provide power from a main power bus of the vehicle to a subsystem of the vehicle such as an anti-lock brake system. | 01-17-2013 |
20130021015 | Device and Method for Controlling a Buck-Boost Converter - A circuit, device, and method for controlling a buck-boost circuit includes a bootstrap capacitor voltage regulator circuit and a comparator circuit. The bootstrap capacitor voltage regulator circuit is electrically coupled to a buck-mode bootstrap capacitor of the buck-boost converter and to a boost-mode bootstrap capacitor of the buck-boost converter. The comparator circuit is configured to control the bootstrap capacitor voltage regulator circuit to maintain a voltage of the bootstrap capacitors above a reference threshold voltage by transferring an amount energy from one of the bootstrap capacitors to the other bootstrap capacitors based on the particular mode of operation of the buck-boost converter. | 01-24-2013 |
20130027016 | STANDARD CELL CIRCUIT, SEMICONDUCTOR INTEGRATED CIRCUIT, AND SEMICONDUCTOR INTEGRATED CIRCUIT DEVICE - A standard cell circuit including an input terminal to which input an input signal is input; an output terminal to output an output signal; a first wiring conductor, connected to an external power supply that outputs a first power supply voltage; a second wiring conductor to supply a second power supply voltage that is lower than the first power supply voltage; a standard cell to operate at the second power supply voltage supplied from the second wiring conductor; and a conversion circuit, connected to the first wiring conductor and the second wiring conductor, to convert the first power supply voltage input from the first wiring conductor into the second power supply voltage for output to the second wiring conductor. | 01-31-2013 |
20130027017 | VOLTAGE TO CURRENT CONVERTING CIRCUIT - A converting circuit for receiving an input voltage and generating an output current, including: a transistor, coupled to a supply voltage at a drain of the transistor, and a source of the transistor is coupled to a first voltage, and a gate of the transistor is coupled to the input voltage and a fixed voltage; and a resistor, coupled to the input voltage and the gate of the transistor, and the output current flows through the resistor, wherein the output current is related to the fixed voltage, the input voltage and the resistor. | 01-31-2013 |
20130033250 | POWER-UP INITIAL CIRCUIT - A power-up initial circuit includes a power-up control unit, a first switch and a second switch. The power-up control unit is used for receiving a high voltage start-up signal, and generating a first power-up control signal. The first switch has a first terminal for receiving an external voltage, a second terminal for coupling to the power-up control circuit for receiving the first power-up control signal, and a third terminal. The second switch has a first terminal coupled to the third terminal of the first switch, a second terminal for coupling to the power-up control circuit for receiving the first power-up control signal, and a third terminal for coupling to a high voltage generator. | 02-07-2013 |
20130038315 | VOLTAGE GENERATOR - A voltage generator includes a controllable voltage divider, a pull-up circuit and a first pull-down circuit. The controllable voltage divider is utilized for generating an output voltage at an output node of the controllable voltage divider according to a first reference voltage, a second reference voltage, and a control signal, wherein the second reference voltage is lower than the first reference voltage. The pull-up circuit is coupled to the output node of the controllable voltage divider and the first reference voltage, and is utilized for selectively connecting the first reference voltage to the output node of the controllable voltage divider. The first pull-down circuit is coupled to the output node of the controllable voltage divider and the second reference voltage, and is utilized for selectively connecting the second reference voltage to the output node of the controllable voltage divider. | 02-14-2013 |
20130038316 | POWER LOSS CONTROL METHOD FOR METAL-OXIDE-SEMICONDUCTOR UNIT AND ASSOCIATED APPARATUS - A power loss control method comprises detecting a load condition of the MOS unit, and adjusting driving loss of the MOS unit based on the load condition. The driving loss of the MOS unit is configured to decrease when the MOS unit is at light load condition. | 02-14-2013 |
20130043857 | HYSTERETIC CHARGER FOR ENERGY HARVESTER DEVICES - A hysteretic converter includes an inductor coupled between a source of voltage and a switch node. A low side switch is coupled between the switch node and a reference voltage. A high side switch is coupled between the switch node and the output of the converter. A driver controls the low side and high side switches, wherein the low side switch is turned on until the input current rises to a predetermined set point, the predetermined setpoint can be adapted to input current from the source of voltage. | 02-21-2013 |
20130043858 | MAXIMUM POWER POINT TRACKING CIRCUIT GENERIC TO A VARIETY OF ENERGY HARVESTER DEVICES - A maximum power point tracking circuit for an energy harvester device, the tracking circuit requiring nanoampere current in a standby mode, includes a maximum power point circuits utilizing a predetermined fraction of the open circuit input voltage to determine the maximum power point for energy harvester device. A circuit determines the predetermined fraction of the open circuit voltage of the energy harvester device. A sample and hold circuit measures and holds him the predetermined fraction of the open circuit voltage of the energy harvester device for use by the maximum power point circuit | 02-21-2013 |
20130063120 | POWER SWITCH RELIABILITY IN SWITCHED CAPACITOR DC-DC CONVERTER - Representative implementations of devices and techniques minimize hot carrier stress in a switched capacitor dc-dc converter. Multi-switch arrangements may be used in conjunction with a timing scheme to stage power switch operation. | 03-14-2013 |
20130063121 | SHORT-CIRCUIT PROTECTION CIRCUIT AND DC-DC CONVERTER - The short-circuit protection circuit includes a first logic circuit that outputs the first logic signal so as to turn off the fourth MOS transistor in a case where the first gate voltage signal has a value that turns on the first MOS transistor and the switching terminal has a terminal voltage between a predetermined first threshold value and the second potential. The short-circuit protection circuit includes a first detecting circuit that compares a first detected voltage between the second end of the first resistor and the first end of the third MOS transistor with a predetermined first reference voltage and outputs, in a case where the first detected voltage is closer to the second potential than the first reference voltage, a first detection signal indicating that the switching terminal and the second potential are short-circuited. | 03-14-2013 |
20130076329 | Equalization circuit and equalization system - An equalization circuit, includes a first input terminal, a second input terminal, a first output terminal, a second output terminal, a first regulating circuit, a second regulating circuit, and a bias voltage generating circuit. The bias voltage generating circuit is connected with both the first regulating circuit and the second regulating circuit. The first regulating circuit includes a first field effect transistor (FET), a second FET, a third FET, a fourth FET, a first resistor connected with the first FET, a second resistor connected with the second FET, a third resistor connected with the third FET, a fourth resistor connected with the fourth FET, a fifth resistor connected with the third FET, a sixth resistor connected with the fourth FET, a first capacitor connected with the third FET, and a second capacitor connected with the fourth FET. An equalization system is further provided. | 03-28-2013 |
20130076330 | POWER CONVERTER - A power converter includes a control circuit provided with a set signal generator, a current command generator, a reset signal generator, a drive signal generator, and a pulse-width limiter. The set signal generator generates a set signal at every predetermined cycle. The current command generator generates a current command based on an output voltage command and an output voltage. The reset signal generator generates a reset signal based on an input current and the generated current command. The drive signal generator generates a drive signal which turns on in synchronisation with the generated set signal to turn on a switching element and which turns off in synchronization with the subsequently generated reset signal to turn off the switching element. The pulse-width limiter limits a pulse-width of the drive signal according to an input voltage and the output voltage, or according to the input voltage and the output voltage command. | 03-28-2013 |
20130099767 | DRIVERS HAVING T-COIL STRUCTURES - A driver includes a first driver stage having at least one input node and at least one first output node. The first driver stage includes a T-coil structure that is disposed adjacent to the at least one first output node. The T-coil structure includes a first set of inductors each being operable to provide a first inductance. A second set of inductors are electrically coupled with the first set of inductors in a parallel fashion. The second set of inductors each are operable to provide a second inductance. A second driver stage is electrically coupled with the first driver stage. | 04-25-2013 |
20130099768 | CONTROL CIRCUIT AND ELECTRONIC APPARATUS USING THE SAME - A control circuit includes: a first switching device that includes a source, a gate, and a drain; a negative voltage generating circuit that generates, from a pulse width modulation signal that controls the gate of the first switching device, a negative potential voltage which is equal to or smaller than a threshold of the first switching device; a gate control circuit that outputs a signal obtained by shifting a level of the pulse width modulation signal by an amount equal to the negative potential voltage to the gate of the first switching device; a second switching device that is disposed on a side of the drain of the first switching device; and a negative voltage detecting circuit that outputs a signal for turning ON the second switching device upon detecting that the negative potential voltage generated by the negative voltage generating circuit has reached a predetermined negative potential. | 04-25-2013 |
20130106386 | POWER SUPPLY SYSTEM | 05-02-2013 |
20130106387 | POWER SUPPLY | 05-02-2013 |
20130106388 | SEMICONDUCTOR DEVICE | 05-02-2013 |
20130113453 | EARTH LEAKAGE POWER SUPPLY WITH BYPASS - A power supply circuit for a remote load and a local controller includes a line connection receiving electrical power from an AC source. A load connection connects to the remote load. A switch is located between the line and load connections. Power is supplied to the load from the AC source through the switch. The switch is selectively opened and closed by the controller. A low voltage supply portion supplies power from the AC source to the controller. The low voltage supply portion includes an energy storage device for storing electrical energy for the controller. A current-limited earth ground portion conducts charging current from the energy storage device to earth and prevents charging current conducted to earth from exceeding a predetermined current level. An earth ground bypass portion conducts at least some of the charging current to the load when the switch located between the line and load is open. | 05-09-2013 |
20130134957 | VOLTAGE GENERATION CIRCUIT - A voltage generation circuit according to one embodiment includes a first booster circuit configured to generate a first voltage having a first voltage value, and a second booster circuit group including a plurality of second booster circuits, each second booster circuit configured to generate a second voltage having a second voltage value. The second booster circuits switch to be connected in series and are configured to be capable of generating the first voltage together with the first booster circuit in a change from a first state to a second state. | 05-30-2013 |
20130134958 | SEMICONDUCTOR SWITCH AND POWER CONVERSION APPARATUS - According to one embodiment, a switch includes a first element with a first withstand voltage, a second element whose withstand voltage is lower than the first withstand voltage, a diode which is connected between a positive electrode of the first element and a positive electrode of the second element in such a manner that a direction from the positive electrode of the second element toward the positive electrode of the first element is a forward direction and whose withstand voltage is equal to the first withstand voltage, a negative electrode of the first element and a negative electrode of the second element being connected, and a circuit configured to apply a positive voltage to the positive terminal output a pulse lower than the first withstand voltage when the first element goes off. | 05-30-2013 |
20130134959 | CONTROLLER - The disclosed invention provides a controller that can prevent overshoot and undershoot from occurring when a voltage is switched to another voltage without using two types of regulators. Voltage regulators supply a power supply voltage to a CPU. An SVID interface receives a command to change the number of voltage regulators to be actuated among the voltage regulators from outside. A phase clock generating circuit makes a stepwise change of the number of voltage regulators to be actuated from the current number of regulators to the commanded number of regulators after change. | 05-30-2013 |
20130141073 | CHARGE RECYCLING A 1 OF N NDL GATE WITH A TIME VARYING POWER SUPPLY - This disclosure describes a time varying power supply that may include a resonator circuit comprising an inductor having first and second terminals, a first capacitor coupled to the first terminal, and a second capacitor coupled to the second terminal, where the first capacitor produces a first time varying power supply output and wherein the second capacitor produces a second time varying power supply output. The time varying power supply may further include an exciter circuit comprising a first PFET and a first NFET coupled to the first terminal and a second PFET and a second NFET coupled to the second terminal. The first and second PFETs and the first and second NFETs may be coupled to a corresponding one of four non-overlapping clock phases. | 06-06-2013 |
20130147457 | SINGLE INDUCTOR MULTIPLE OUTPUT (SIMO) DIRECT CURRENT-TO-DIRECT CURRENT (DC/DC) CONVERTER AND CONTROL METHOD THEREOF - Provided is a single inductor multiple output (SIMO) direct current-to-direct current (DC/DC) converter that may perform DC/DC conversion by transferring, to output nodes, input current that is input and thereby stored in a single inductor. An output selection unit of the SIMO DC/DC converter may select, from output nodes, a first output node to be supplied with current from a driving unit, and provide output voltage of the first output node and reference voltage of the first output node to a hysteresis comparison unit. The hysteresis comparison unit may control on-time and/or inductor peak current by determining whether the output voltage of the first output node is higher than the reference voltage of the first output node by at least a first threshold, and whether the output voltage of the first output voltage is lower than the reference voltage of the first output voltage by at least a second threshold. | 06-13-2013 |
20130147458 | ADAPTIVE DEAD-TIME CONTROL - A DC-to-DC converter includes first and second transistors that are connected in series between a supply voltage and ground and that are driven by PWM pulses. A junction of the transistors is connected to an inductance that is connected in series to a load. A first timing module determines a first time difference between a first edge of a first signal at the junction and a first edge of a second signal at a control terminal of the first transistor. A second timing module determines a second time difference between a second edge of the first signal and a second edge of the second signal. The first and second edges of the second signal respectively correspond to first and second edges of one of the PWM pulses. A delay module delays the first and second edges of the second signal respectively based on the first and second time differences. | 06-13-2013 |
20130154601 | REGULATOR TRANSIENT OVER-VOLTAGE PROTECTION - This document discusses, among other things, apparatus and methods for providing over-voltage transient protection of a voltage regulator. In an example, an apparatus can include a first transistor including a control node and first and second switch nodes, and a low-pass filter configured to couple to the control node of the first transistor and to switch the first transistor to a first state when a voltage change of the supply voltage exceeds a threshold. The first transistor, in the first state, can be configured to couple a control node of a second transistor to the supply voltage to protect components coupled to a regulator transistor. | 06-20-2013 |
20130154602 | Pulse Width Modulation Controller Architectures - Systems, apparatuses, and techniques for pulse width modulation (PWM) are described. A described system includes a circuit that contains an inductor and a transistor that controls current through the inductor based on a PWM signal to produce an output; and a controller to provide the PWM signal, which includes PWM cycles that include on-durations and off-durations. The controller can receive a first signal indicating an input voltage that is applied to the inductor, receive a second signal indicating a current through the inductor, use an on-duration parameter value to control the on-duration, determine a maximum off-duration of the off-durations corresponding to the PWM cycles occurring within a first voltage cycle, the first voltage cycle being defined between two consecutive zero-crossing events as indicated by the first signal, and adjust the on-duration parameter value for a second, subsequent voltage cycle based on the maximum off-duration to regulate the output voltage. | 06-20-2013 |
20130162236 | Energy Harvest System and the Method Thereof - The present disclosure discloses an energy harvest system converting an AC source provided by an energy harvester to a desired voltage. The AC source is boosted to the desired voltage by a bi-directional booster converter comprising fourth controllable transistors configured in an H-bridge, and stored by a storage capacitor. The desired voltage is then used to power various loads. | 06-27-2013 |
20130162237 | Energy-based Oriented Switching Mode Power Supply - An energy-based oriented switching mode power supply includes a bi-directional converter having an energy input and a load output, and an energy based pulsed generator connected between the energy input and the load output for outputting a gate voltage signal controlling how much energy is supplied from the energy input. The energy based pulsed generator receives a clock signal and outputs the gate voltage signal according to the load output of the bi-directional converter when the clock signal is at a high level. Accordingly, the switching mode power supply achieves a hybrid of PWM and PFM, depending on the energy demand of the load output, for a fast transient response and a small voltage ripple whilst improving power efficiency over a wide load range. | 06-27-2013 |
20130169258 | Switching Mode Power Supply and the Method Thereof - The present disclosure discloses a switching mode power supply with bi-direction buck and boost control. The switching mode power supply enters boost mode when an input signal is higher than a preset threshold to pump the input signal to a higher level; and the switching mode power supply enters buck mode when the input signal breaks down to release the stored energy. | 07-04-2013 |
20130176013 | SEMICONDUCTOR DEVICE AND POWER SUPPLY APPARATUS - A semiconductor device includes a first transistor including a GaN-based semiconductor stacked structure formed over a substrate, a first gate electrode having a plurality of first fingers over the semiconductor stacked structure, a plurality of first drain electrodes provided along the first fingers, and a plurality of first source electrodes provided along the first fingers; a second transistor including the semiconductor stacked structure, a second gate electrode having a plurality of second fingers over the semiconductor stacked structure, the second drain electrodes provided along the second fingers, and a plurality of second source electrodes provided along the second fingers; a drain pad provided over or under the first drain electrodes, and coupled to the first drain electrodes; a source pad provided over or under the second source electrodes, and coupled to the second source electrodes; and a common pad coupled to the first source electrodes and the second drain electrodes. | 07-11-2013 |
20130176014 | MULTI-LEVEL VOLTAGE CONVERTER - The invention discloses a voltage source converter and a voltage source converter system. The voltage source converter comprises: a multi-level voltage source converter, being adapted to output a multiple levels of a first voltage at one of two first output terminals through a multiple of first conducting paths; a first energy store; and a first switching element, being arranged to directly connected with the first output terminal, and being adapted to switch the first energy store in or out of the first conducting path so as to combine a level of the voltage of the first energy store with the level of the first voltage as a second voltage output at a second output terminal. By having the topology as above, the voltage class of each of the power semiconductors can be kept lower with the number of the power semiconductors unchanged. Besides, V | 07-11-2013 |
20130181693 | SWITCHING CIRCUIT AND POWER SUPPLY DEVICE - A switching circuit includes first and second MOS transistors of the same conductive type. The second MOS transistor has a drain connected to a first terminal, a source connected to a load connecting terminal, a gate connected to a gate of the first MOS transistor, and a back gate connected to a source of the first MOS transistor. The switching circuit includes a circuit that controls a current flowing between the source of the first MOS transistor and a resistor connecting terminal so that the potential of the source of the first MOS transistor and the potential of the source of the second MOS transistor are equal. This switching circuit further includes a circuit that outputs a control signal to the gate of the first MOS transistor and the gate of the second MOS transistor and controls the operations of the first MOS transistor and the second MOS transistor. | 07-18-2013 |
20130181694 | Converter For Converting An Input Current To An Output Voltage, Arrangement Comprising The Converter And Method For Converting An Input Current To An Output Voltage - A converter for converting an input current to an output voltage may include: a first region; a second region galvanically separated from the first region; an input reference node in the first region, wherein the converter allows a flow of the input current through a device to the input reference node; a circuitry for generating, based on the input current, the output voltage relative to an output reference electric potential, the circuitry including a voltage transfer component for transferring the output voltage from the first region to the second region, wherein the voltage transfer component comprises a first circuit in the first region and a second circuit in the second region, wherein the first circuit is driven by a first electric supply voltage relative to a first supply reference potential; and an output terminal, located in the second region and connected to the second circuit, for outputting the output voltage. | 07-18-2013 |
20130187626 | Soft Switch Driving Circuit - A soft switch driving circuit is disclosed for a DC converter, to transform an input voltage into an output voltage. The soft switch driving circuit includes a regulating module for outputting a reference voltage, a first bootstrap circuit for generating a first voltage value according to a DC voltage, a second bootstrap circuit for generating a second voltage value according to the reference voltage, a control module for generating a plurality of control signals according to a control voltage, a switch module having one end coupled to the first bootstrap circuit and another end coupled to the second bootstrap circuit for outputting a voltage signal, and an output circuit connected to the control module and the switch module for transforming the input voltage into the output voltage according to the voltage signal and one of the plurality of controlling signals. | 07-25-2013 |
20130187627 | SEMICONDUCTOR DEVICE AND POWER SUPPLY DEVICE - A semiconductor device includes: a lead frame that is composed of a lead and a die stage; a GaN-HEMT that is disposed on the die stage and has a source electrode on a rear surface of the GaN-HEMT, the source electrode being connected to the die stage; and a MOS-FET that is disposed on the die stage and has a drain electrode on a rear surface of the MOS-FET, the drain electrode being connected to the die stage; wherein the source electrode of the GaN-HEMT and the drain electrode of the MOS-FET are cascode-connected with each other via the die stage. | 07-25-2013 |
20130193947 | POWER CONVERTER - A high voltage resonant step-up convertor converts a lower voltage signal to a higher voltage signal. The converter may be used, for example, to supply power via electromagnetic coupling to an implantable medical device. In some embodiments, a power converter comprises a driver circuit and a resonant circuit. The resonant circuit generates a high voltage output signal at a selected frequency. The driver circuit is controlled by a low voltage signal and periodically generates a higher frequency signal (e.g., approximately twice the selected frequency) to drive the resonant circuit. In some embodiments, the driver circuit comprises another resonant circuit and a switching circuit. The switching circuit periodically pumps current to the other resonant circuit and isolates the two resonant circuits. The other resonant circuit periodically pumps current to the output resonant circuit. | 08-01-2013 |
20130200876 | REGULATING APPARATUS WITH SOFT-START AND FAST-SHUTDOWN FUNCTION - A regulating apparatus with soft-start and fast-shutdown function is applied to a voltage-supplying apparatus. The regulating apparatus includes a soft-start and fast-shutdown circuit, a regulating circuit, and a ground circuit. When voltages are supplied from the voltage-supplying apparatus to the soft-start and fast-shutdown circuit, the regulating circuit, and the ground circuit, the ground circuit is connected to ground, so that the starting time of the regulating circuit is delayed by the soft-start and fast-shutdown circuit. When voltages are not supplied from the voltage-supplying apparatus to the soft-start and fast-shutdown circuit, the regulating circuit, and the ground circuit, the ground circuit is not connected to ground, so that the regulating circuit is shut down fast by the soft-start and fast-shutdown circuit. | 08-08-2013 |
20130214757 | Bootstrap Circuitry for an IGBT - A bootstrap circuit provides a gate-emitter voltage to the high-side IGBT of a half-bridge IGBT arrangement. The bootstrap circuit includes a buck-boost circuit for providing a negative gate-emitter voltage for turning the high-side IGBT off. | 08-22-2013 |
20130214758 | STEP-DOWN DC-TO-DC CONVERTER - An inductor L | 08-22-2013 |
20130234693 | POWER SOURCE - Power source, in particular for use in a databus in public means of transportation, wherein the power source has a first transistor (T | 09-12-2013 |
20130241519 | METHODS AND SYSTEMS FOR CONTROLLING A BOOST CONVERTER - Methods and systems are provided for control operation of a boost converter. The boost converter includes an input, an output, and a plurality of paths electrically connecting the input to the output. The boost converter also includes a plurality of switches disposed along the paths to control current flow between the input and the output. The system includes a controller. The controller receives a desired current to be supplied at the output. The controller determines which of the paths to utilize based at least in part on the desired current. The controller controls the switches based at least in part on the determination of which of the paths to utilize. | 09-19-2013 |
20130241520 | POWER MANAGEMENT CHIPS AND POWER MANAGEMENT DEVICES INCLUDING THE SAME - A power management chip and a power management device including the power management chip. The power management chip includes at least one power switch and a driver unit for generating a driving signal for driving the at least one power switch, the driver unit including one or more circuit units formed on a same substrate as the at least one power switch. | 09-19-2013 |
20130241521 | VOLTAGE STABILIZING CIRCUIT AND ELECTRONIC DEVICE - A voltage stabilizing circuit includes an input terminal that receives an external input voltage, a three terminal voltage regulator including an input pin and an output pin; and a voltage reduction unit. The voltage reduction unit reduces the external input voltage and outputs the reduced external input voltage to the input pin. The three terminal voltage regulator regulates the reduced external input voltage to a stabilized supply voltage, and outputs the stabilized supply voltage through the output pin for powering a load. | 09-19-2013 |
20130249523 | METHOD AND DEVICE FOR CURRENT DRIVEN ELECTRIC ENERGY CONVERSION - Device comprising an electric power converter circuit for converting electric energy. The converter circuit comprises a switch arrangement with two or more controllable electric switches connected in a switching configuration and controlled so as to provide a current drive of electric energy from an associated electric source connected to a set of input terminals. This is obtained by the two or more electric swiches being connected and controlled to short-circuit the input terminals during a part of a switching period. Further, a low pass filter with a capacitor and an inductor are provided to low pass the output from the switch arrangement and designed such that a high impedance at a frequency range below the switching frequency is obtained, seen from the output terminals. Switches implemented by normally-on-devices are preferred, e.g. in the form of a JFET. The converter circuit may be in different configurations such as half bridge buck, full bridge buck, half bridge boost, or full bridge boost. A current driven conversion is advantageous for high efficient energy conversion from current sources such as solar cells or where a voltage source is connected through long cables, e.g. powerline cables for long distance transmission of electric energy. In many applications the total size of filter components (capacitors and inductors) can be reduced compared to voltage driven topologies. One application is an audio amplifier arranged to drive a loudspeaker. | 09-26-2013 |
20130257408 | DC-DC CONVERTER AND PORTABLE DEVICE - A DC-DC converter includes: a step-up-or-step-down circuit including a choke coil and step-down and step-up transistor pairs; and a control circuit to control the transistor pairs based on an output voltage, wherein the control circuit includes: a differential triangular wave generation circuit to generate a positive-phase triangular wave signal and a negative-phase triangular wave signal; a switch to select the positive-phase triangular wave signal or the negative-phase triangular wave signal in response to a switching signal; an error detector to output an error signal; a PWM comparator to compare the positive-phase triangular wave signal or the negative-phase triangular wave signal with the error signal to generate a control pulse signal; a switching comparator to compare the error signal with reference potential and generate the switching signal; and a driver control circuit to generate a control signal for the transistor pairs based on the control pulse signal and the switching signal. | 10-03-2013 |
20130257409 | CONTROL CIRCUIT FOR DC-DC CONVERTER, DC-DC CONVERTER, AND CONTROL METHOD OF DC-DC CONVERTER - A control circuit for a DC-DC converter includes: an output control circuit configured to control an output voltage of a DC-DC converter according to a reference voltage; a reference control circuit configured to control the reference voltage according to an open-circuit voltage of an external power supply coupled to the DC-DC converter; a limiting circuit configured to limit a current flowing from DC-DC converter to an external load; and a stopping control circuit configured to stop operation of the limiting circuit until the reference voltage reaches a given value. | 10-03-2013 |
20130265028 | HIGH SIDE GATE DRIVER, SWITCHING CHIP, AND POWER DEVICE - A high side gate driver, a switching chip, and a power device, which respectively include a protection device, are provided. The high side gate driver includes a first terminal configured to receive a first low level driving power supply that is provided to turn off the high side normally-on switch; a first switching device connected to the first terminal; and a protection device connected in series between the first switching device and a gate of the high side normally-on switch, the protection device configured to absorb a majority of a voltage applied to a gate of the high side normally-on switch. The power device includes the high side gate driver. In addition, the switching chip includes a high side normally-on switch, an additional normally-on switch, and a low side normally-on switch, which have a same structure. | 10-10-2013 |
20130265029 | SEMICONDUCTOR DRIVER CIRCUIT AND POWER CONVERSION DEVICE - In a power conversion device provided with a power semiconductor device and a semiconductor driver circuit for driving the power semiconductor device, false firing can be prevented, and improvement in reliability can be achieved. The power conversion device is provided with: a first switch element inserted between a power supply voltage and an output node; a second switch element inserted between a ground power supply voltage and the output node; and a gate driver circuit for controlling turning ON/OFF of the second switch element. When the second switch element is controlled to be turned OFF, the gate driver circuit drives a gate-source voltage at, for example, a level of 0 V. However, when the first switch element is shifted from an OFF state to an ON state at a first timing in a state that the gate-source voltage is driven at, for example, the level of 0 V, the gate driver circuit temporarily applies a level of a negative voltage as the gate-source voltage during a first period which crosses over the first timing. | 10-10-2013 |
20130271105 | DC-DC CONVERTER SWITCHING TRANSISTOR CURRENT MEASUREMENT TECHNIQUE - A method is described comprising conducting a first current through a switching transistor. The method also comprises conducting a second current through a pair of transistors whose conductive channels are coupled in series with respect to each other and are together coupled in parallel across the switching transistor's conductive channel. The second current is less than and proportional to the first current. | 10-17-2013 |
20130278238 | ELECTRONIC DEVICE - An electronic device receiving a voltage from a power supply comprises a load, a control module, a switching module, and a protection module. The control module generates a first control signal. The protection module transmits the first control signal to the switching module. The switching module establishes an electrical connection between the power supply and the load in response to the first control signal. The load is powered by the power supply when the electrical connection between the power supply and the load is established. The protection module connected between the control module and the switching module prevents a reverse current or a reverse voltage supplied by the power supply from being transmitted to the control module. | 10-24-2013 |
20130293214 | Direct Current Converter for Bootstrap Circuit with predetermined charging duration - A direct current (DC) converter for converting an input voltage to an output voltage, includes a driving-stage circuit having an upper and a lower switch for converting the input current to a switch signal and transmitting the switch signal through an output terminal, an output-stage circuit coupled to the output terminal for converting the switch signal to the output voltage, a bootstrap circuit coupled between a bootstrap voltage terminal and the output terminal of the driving-stage circuit, a upper switch driving circuit for generating the upper switch control signal, and a control module for generating the upper and the lower switch control signal and controlling the upper switch driving circuit to generate the upper switch control signal according to a first and a second time duration, so as to timely switch the bootstrap circuit to a charge state accordingly. | 11-07-2013 |
20130300394 | CURRENT SLOPE CONTROL METHOD AND APPARATUS FOR POWER DRIVER CIRCUIT APPLICATION - A low side driver includes a first transistor coupled in series with a second transistor at a low side voltage node for a load. A capacitance is configured to store a voltage and a voltage buffer circuit has an input coupled to receive the voltage stored by the capacitance and an output coupled to drive a control node of the second transistor with the stored voltage. A current source supplies current through a switch to the capacitance and the input of the voltage buffer circuit. The switch is configured to be actuated by an oscillating enable signal so as to cyclically source current from the current source to the capacitance and cause a stepped increase in the stored voltage which is applied by the buffer circuit to the control node of the second transistor. | 11-14-2013 |
20130307513 | HIGH VOLTAGE FIELD EFFECT TRANSISTORS - Transistors suitable for high voltage and high frequency operation. A nanowire is disposed vertically or horizontally on a substrate. A longitudinal length of the nanowire is defined into a channel region of a first semiconductor material, a source region electrically coupled with a first end of the channel region, a drain region electrically coupled with a second end of the channel region, and an extrinsic drain region disposed between the channel region and drain region. The extrinsic drain region has a wider bandgap than that of the first semiconductor. A gate stack including a gate conductor and a gate insulator coaxially wraps completely around the channel region, drain and source contacts similarly coaxially wrap completely around the drain and source regions. | 11-21-2013 |
20130314067 | LOW POWER DC-DC CONVERTER AND METHOD OF OPERATING THE SAME - A low power DC-DC converter includes a converter stage coupled to an input node, and having a low side switch and a rectifier switch. A peak current detector senses a current at the low side switch and a zero current detector senses a current at the rectifier switch. It is configured to set the low side switch to a non-conductive state and the rectifier switch to a conductive state if the peak current detector detects a predetermined peak current. It is configured to set the rectifier switch to a non-conductive state if the zero current detector detects zero current at the rectifier switch. A time interval between subsequent current peaks is triggered by a charge comparator receiving an average current fed to the low side and rectifier switches from the input node and a reference current coupled to the charge comparator by a reference current source. | 11-28-2013 |
20130320951 | EXPANDING DC/DC CONVERTER INTO MULTIPHASE DC/DC CONVERTER - A DC/DC converter configurable for operating as a multiphase DC/DC. A controller produces a master drive signal for controlling a primary power switch to produce the output DC signal at a desired level. Multiple secondary power stages are coupled between the input and the output nodes for producing an output DC signal. Each of the multiple secondary power stages has at least one secondary power switch responsive to the input DC signal for producing the output DC signal. An expander system configures the DC/DC converter for operation in a multiphase DC/DC conversion mode. The expander system is responsive to the master drive signal for producing multiple slave drive signals respectively supplied to the multiple secondary power stages for controlling secondary power switches. The slave drive signals have phases shifted with respect to the master drive signal and with respect to each other. | 12-05-2013 |
20130320952 | MONOLITHICALLY INTEGRATED HEMT AND CURRENT PROTECTION DEVICE - A transistor device includes a high electron mobility field effect transistor (HEMT) and a protection device. The HEMT has a source, a drain and a gate. The HEMT switches on and conducts current from the source to the drain when a voltage applied to the gate exceeds a threshold voltage of the HEMT. The protection device is monolithically integrated with the HEMT so that the protection device shares the source and the drain with the HEMT and further includes a gate electrically connected to the source. The protection device conducts current from the drain to the source when the HEMT is switched off and a reverse voltage between the source and the drain exceeds a threshold voltage of the protection device. The protection device has a lower threshold voltage than the difference of the threshold voltage of the HEMT and a gate voltage used to turn off the HEMT. | 12-05-2013 |
20130320953 | LONG PULSE DROOP COMPENSATOR - One example embodiment may include a power supply system. The power supply system may include a main capacitor and a boost converter. The main capacitor is used to generate an electrical pulse. The boost converter is configured to be coupled to the main capacitor. Additionally, the boost converter includes a compensator supply including an energy storage capacitor that can store electrical energy. The boost converter also includes and a compensator inductor that receives the electrical energy from the compensator supply and is configured to supply electrical energy to the main capacitor when the main capacitor is generating the electrical pulse. | 12-05-2013 |
20130320954 | SWITCHED-MODE VOLTAGE CONVERTER WITH ENERGY RECOVERY SYSTEM - Devices, systems and methods are provided for a switched-mode voltage converter system with energy recovery. The device may include a first voltage converter circuit including a boost voltage node and an output voltage port coupled to a load. The first voltage converter circuit configured to deliver energy from the boost voltage node to the load in a first mode, and to deliver energy from the load to the boost voltage node in a second mode. The device may also include a second voltage converter circuit coupled to an energy source and to the boost voltage node, the second voltage converter circuit configured to convert a first voltage associated with the energy source to a second voltage associated with the boost voltage node. | 12-05-2013 |
20130328540 | BUCK SWITCHING REGULATOR AND CONTROL CIRCUIT THEREOF - The present invention discloses a buck switching regulator and a control circuit thereof, wherein the buck switching regulator converts an input voltage to an output voltage. The buck switching regulator includes: a power stage including an upper-gate switch, a lower-gate switch and an inductor, which are coupled to a switching node, wherein the upper-gate switch is electrically connected to the input voltage; a transistor electrically connected between the inductor and the output voltage; and a driver circuit, which controls the upper-gate switch and the lower-gate switch at least according to a current flowing through the transistor. | 12-12-2013 |
20130328541 | SUB-MODULE OF A MODULAR MULTI-STAGE CONVERTER - A sub-module for a modular multi-stage converter has an energy store and a power semiconductor series circuit connected in parallel to the energy store. In the semiconductor series circuit, two power semiconductor switches that can be activated and deactivated and have the same forward direction are connected in series. A free-wheeling diode is connected in parallel and in the opposite direction to each power semiconductor switch. A first connection terminal is connected to the energy store. A second connection terminal is connected to a potential point between the power semiconductor switches and to the free-wheeling diodes thereof. A bridging switch is disposed between the connection terminals for bridging the sub-module. The power semiconductors thereof are not destroyed upon closing the bridging switch and at least one connection terminal and/or a bridging branch that connects the two connection terminals to each other has an inductive component. | 12-12-2013 |
20130335054 | Synchronous Rectifier Timer for Discontinuous Mode DC/DC Converter - A DC-DC converter ( | 12-19-2013 |
20130335055 | System and Method for Boosted Switches - In accordance with an embodiment, a method includes activating a first semiconductor switch having a first switch node coupled to a first input of a bootstrap circuit, a second switch node, and a control node coupled to a first end of a capacitor of the bootstrap circuit. A first end of the capacitor is coupled to the first input of the bootstrap circuit and a second end of the capacitor is set to a first voltage. Next, the first end of the capacitor is decoupled from the first input of the bootstrap circuit, and the second end of the capacitor is set to a second voltage. The control node is boosted to a first activation voltage that turns on the first semiconductor switch. | 12-19-2013 |
20140002049 | BRIDGE DRIVER FOR A SWITCHING VOLTAGE REGULATOR | 01-02-2014 |
20140002050 | VOLTAGE REGULATOR CIRCUITRY OPERABLE IN A HIGH TEMPERATURE ENVIRONMENT OF A TURBINE ENGINE | 01-02-2014 |
20140002051 | ADAPTIVE CASCODE CIRCUIT USING MOS TRANSISTORS | 01-02-2014 |
20140021932 | Charge Recovery in Power Converter Driver Stages - A power converter includes a first transistor operable to source current to a load when switched on, a second transistor operable to freewheel inductor current or sink current from the load when switched on, and a driver circuit. The driver circuit is operable to switch the first transistor on and the second transistor off during a first period, switch the first transistor off and the second transistor on during a third period after the first period, and connect a gate of the first transistor to a gate of the second transistor during a second period between the first and third periods when the gates of both transistors are floating. | 01-23-2014 |
20140021933 | SYNCHRONOUS BUCK CONVERTER WITH DYNAMICALLY ADJUSTABLE LOW SIDE GATE DRIVER - One embodiment provides A DC-DC converter system that includes a high side switch and a low side switch coupled to a power supply, each switch is configured to transition from an on state to an off state and from an off state to an on state to deliver current to an inductor and a load. This embodiment also includes low side driver circuitry configured to control the conduction state of the low side switch and configured to drive the low side switch with a first gate driving signal during a first mode of operation and with a second gate driving signal during a second mode of operation. The first gate driving voltage is stronger than the second gate driving signal and the second gate driving signal is configured to cause a slower switch transition of the low side switch compared to the first gate drive control signal. | 01-23-2014 |
20140021934 | DEVICES AND COMPONENTS FOR POWER CONVERSION CIRCUITS - A circuit includes a switching device comprising a control terminal and first and second power terminals, and an inductive element having a first terminal electrically connected to the second power terminal of the switching device. The electronic circuit is configured such that in a first mode of operation, the control terminal of the switching device is biased off, current flows through the inductive element, and the switching device blocks a first voltage. In a second mode of operation, the control terminal of the switching device is biased off, and voltage blocked by the switching device decreases from the first voltage to a second voltage. In a third mode of operation, the control terminal of the switching device is biased on and the current flowing through the inductive element flows through the switching device. | 01-23-2014 |
20140035549 | MULTI-STANDARD, AUTOMATIC IMPEDANCE CONTROLLED DRIVER WITH SUPPLY REGULATION - A pre-driver circuit generates a driver bias signal based on a swing command, a driver impedance characteristic, and an input signal. A driver receives the driver bias signal and generates, in response, a driver signal having a swing and having an output impedance corresponding to the bias signal. Optionally, the driver receives power from a switchable one of multiple supply rails, according to the swing. Optionally, the driver has voltage controlled resistor elements and the driver bias signal is generated based on the swing command and a replica of the driver voltage controlled resistor elements. | 02-06-2014 |
20140035550 | VOLTAGE REGULATOR CIRCUIT - A voltage regulator circuit includes a plurality of transistors and a control circuit. Each transistor has two source/drain terminal and a gate terminal. One source/drain terminal of each transistor is electrically coupled to a source voltage, and the other source/drain terminals of the transistors are electrically coupled to each other and corporately referred to as an output terminal of the voltage regulator circuit. The control circuit is electrically coupled to the gate terminals of the transistors and configured to determine the number of the transistors to be turned on according to the difference between the voltage at the output terminal and a predetermined reference voltage. | 02-06-2014 |
20140035551 | SEMICONDUCTOR DEVICE AND POWER SUPPLY DEVICE - The present invention realized miniaturization of a power supply device using a multiphase system. The power supply device includes, for example, a common control unit, a plurality of PWM-equipped drive units, and a plurality of inductors. The common control unit outputs clock signals respectively different in phase to the PWM-equipped drive units. The clock signals are controllable in voltage state individually respectively. For example, the clock signal can be brought to a high impedance state. In this case, the PWM-equipped drive unit detects this high impedance state and stops its own operation. It is thus possible to set the number of phases in multiphase arbitrarily without using another enable signal or the like. | 02-06-2014 |
20140035552 | Apparatus for PWM Gate Drive Circuit - A converter comprises a high side switch, a low side switch connected in series with the high switch, a gate drive circuit comprising a first drive port coupled to a gate of the high side switch, a second drive port coupled to a gate of the low side switch, an SRE input port and
| 02-06-2014 |
20140043009 | SEMICONDUCTOR INTEGRATED CIRCUIT AND POWER SUPPLY CIRCUIT - A semiconductor integrated circuit that includes: a capacitive element that has a first end connected to a first node and a second end connected to a second node of higher electrical potential than the first node; and a semiconductor element that has a source electrode, a drain electrode and a gate electrode respectively formed in a second conducting region, the second conducting region being formed with a different conducting type to a first conducting region, and the first conducting region formed on a substrate, with the source electrode and the second conducting region connected to the first node, and the first conducting region connected to the second node. | 02-13-2014 |
20140043010 | RECURSIVE DC-DC CONVERTER - In general, in one aspect, a direct-current to direct-current (DC-DC) converter that receive one or more of input voltages and generates one or more of output voltages. The DC-DC converter is capable of operating at one of a plurality of voltage conversion ratios and selection of the one of a plurality of voltage conversion ratios is based on an input voltage received, the DC-DC converter may include a plurality of capacitors, a plurality of inductors, and a plurality of switches which create a plurality of switched cells connected in cascade, in a stack, or in cascade and in a stack, wherein each switched cell is capable of operating in one of a plurality of modes. | 02-13-2014 |
20140049242 | REGULATOR DEVICE - A regulator device includes: a power input terminal; a power output terminal; a plurality of regulators each including an operating FET and a monitoring FET to be driven together with the operating FET, the plurality of regulators being arranged in parallel between the power input terminal and the power output terminal; and a controller configured to drive the operating FET and the monitoring FET included in one of the regulators, when the controller determines whether the monitoring FET included in the one of the regulators have degraded, the controller configured to stop driving the operating FET and the monitoring FET included in the one of the regulators and configured to drive the operating FET and the monitoring FET included in another of the regulators. | 02-20-2014 |
20140055117 | Digitally Controlled Spur Management Technique for Integrated DC-DC Converters - An integrated circuit for digital controlling switching noise spurs in a receiver by shifting a switching frequency (f | 02-27-2014 |
20140055118 | HIGH EFFICIENCY DC/DC CONVERTER WITH HIGH CONVERSION RATIO - A high efficiency DC/DC converter with high conversion ratio is provided. The DC/DC converter includes a power switch for selectively switching an electrical connection between one side of a power supply and anodes of a first diode and a second diode, a first capacitive element whose one side is connected to a cathode of the first diode, a second capacitive element whose one side is connected to a cathode of the second diode, a first-first switch for selectively switching an electrical connection between the other side of the first capacitive element and the other side of the power supply, and a second-first switch for selectively switching an electrical connection between the other side of the first capacitive element and one side of the second capacitive element. | 02-27-2014 |
20140055119 | Power Supply of a Load at a Floating-Potential - A circuit includes a current source intended to be series-connected with a load between two terminals of application of a first D.C. voltage. An element limits the voltage across the load and a circuit controls the value of the current in the current source with the current flowing in the element. | 02-27-2014 |
20140055120 | INDUCTOR ARRAY CHIP AND DC-DC CONVERTER - An inductor array chip includes a magnetic laminated body and a plurality of inductors. The magnetic laminated body includes a plurality of stacked magnetic layers. The plurality of inductors are arranged inside the magnetic laminated body. The inductance of a first inductor differs from the inductance of a second inductor. The inductors include a plurality of coil-shaped conductors and via-hole conductors. The plurality of coil-shaped conductors are arranged between the magnetic layers. The via-hole conductors electrically connect the plurality of coil-shaped conductors. The inductors include a plurality of inductors in which the section sizes of the coil-shaped conductors differ from one another. | 02-27-2014 |
20140062447 | TIMING CONTROL CIRCUIT AND ELECTRONIC DEVICE USING THE SAME - A timing control circuit for an electronic device is disclosed. The timing control circuit includes a first power supply voltage input, a second power supply voltage input, a third power supply voltage input, a first output, a second output, a switch circuit and a control circuit. The control circuit is connected with the switch circuit and configured to turn the switch circuit on/off. The switch circuit is connected between the first power supply voltage input and the first output and responds to the control circuit to delay, by means of adjustable (different capacitance values) capacitors, the power connections when the electronic device is turned on but to immediately disconnect the power connections when the electronic device is shut down, thereby controlling the sequence of power applications and avoiding the need for expensive chips or circuits. | 03-06-2014 |
20140062448 | VOLTAGE LEVEL CONVERTING CIRCUIT AND ELECTRONIC DEVICE USING THE SAME - A circuit for an electronic device translates logic-low and logic-high voltage levels into other voltage levels suitable for digital intercommunication between the host electronic device and external devices, and between different external devices. The circuit comprises a power supply, a processing module, a communicating module, and a voltage converting module. The power supply provides a first voltage, a second voltage, and a pulse voltage with a predetermined duty cycle. The voltage level converting module converts incoming or outgoing logic voltage levels between a first mode and a second or more modes. | 03-06-2014 |
20140062449 | SWITCHING MODE CONVERTER AND METHOD FOR CONTROLLING THEREOF - Disclosed herein are a switching mode converter and a method for controlling thereof. The switching mode converter includes a switching element, a bootstrap capacitor, and a control unit. The switching element is connected between one side of a first semiconductor device, another side of the first semiconductor device is connected to a ground, and an input power. The bootstrap capacitor is configured such that one side of the bootstrap capacitor is connected to the one side of the first semiconductor device. The control unit controls the output current or output voltage of a common charge pump provided to the switching element and the bootstrap capacitor in order to control the charging state of the bootstrap capacitor and the gate voltage of the switching element. | 03-06-2014 |
20140062450 | CAPACITIVE LOAD DRIVE CIRCUIT, LIQUID EJECTION PRINTING APPARATUS, LIQUID EJECTION DEVICE, FLUID TRANSPORTATION DEVICE, AND MEDICAL INSTRUMENT - A capacitive load drive circuit includes a modulation circuit adapted to pulse-modulate a drive waveform signal to thereby generate a modulation signal, two switching elements (transistors) constituting a push-pull circuit and adapted to generate a power-amplified modulation signal, a low-side driver and a high-side driver adapted to switch ON/OFF of the respective switching elements, a bootstrap circuit, a power supply adapted to supply the low-side driver and the high-side driver with a predetermined electrical potential, and a first resistor disposed in a supply channel from the power supply to the bootstrap circuit. | 03-06-2014 |
20140084895 | METHOD FOR PERFORMING REFRESHING CONTROL OF A DC-TO-DC CONVERTER, AND ASSOCIATED APPARATUS - A method for performing refreshing control of a direct current (DC)-to-DC converter includes: monitoring at least one duration of a control signal of a switching unit of the DC-to-DC converter to determine a statistics result, the duration corresponding to a duty cycle of the control signal; and based upon the statistics result, performing refreshing control on a bootstrap capacitor within the DC-to-DC converter. In particular, the step of monitoring the duration of the control signal of the switching unit of the DC-to-DC converter to determine the statistics result further includes monitoring whether a length of the duration falls within a predetermined range, wherein the statistics result represents a number of times that the length of the duration falls within the predetermined range. For example, the statistics result represents the number of times that the length of the duration successively falls within the predetermined range. An associated apparatus is also provided. | 03-27-2014 |
20140084896 | LOW POWER LOW DROPOUT LINEAR VOLTAGE REGULATOR - Embodiments of a linear voltage regulator are described. In one embodiment, the linear voltage regulator includes a PMOS low drop-out (LDO) regulator configured to convert an input voltage to a regulated voltage, a charge pump connected to the PMOS LDO regulator and configured to amplify the regulated voltage into an amplified voltage, and an NMOS LDO regulator connected to the charge pump and configured to convert the amplified voltage into an output voltage. Other embodiments are also described. | 03-27-2014 |
20140084897 | Current Detection Device and Buck-Boost DC-DC Converter Using the Same - A current detection device for a buck-boost DC-DC converter is disclosed. The current detection device comprises a detecting terminal coupled to two low-side transistors of the buck-boost DC-DC converter, and only one current sensing unit for detecting a current flowing through the detecting terminal, to detect an output current of the buck-boost DC-DC converter. | 03-27-2014 |
20140084898 | STEP DOWN CONVERTER - A step down DC converter includes a switch, one end of the switch is coupled to a DC voltage source, and the other end of the switch is coupled to a first inductor and a first diode which serial coupled to the first inductor. The converter further includes an auto charge pump circuit which is coupled to the first inductor and the first diode and provides an output current to a load. | 03-27-2014 |
20140097822 | POWER SUPPLY AND STARTUP CIRCUIT THEREOF - A power supply and its startup circuit are provided. The startup circuit includes a first transistor, a bias resistor, a pull-down switch, a voltage detector, and a discharging path generator. A first end of the first transistor receives alternating current (AC) input power. The bias resistor is serially coupled between a second end and a control end of the first transistor. The pull-down switch is turned on or turned off according to a detection result. The voltage detector generates the detection result by detecting a voltage on the second end of the first transistor. The discharging path generator provides a discharging path between the second end of the first transistor and a reference ground voltage according to the detection result. | 04-10-2014 |
20140103897 | GLITCH SUPPRESSION IN DC-TO-DC POWER CONVERSION - Exemplary embodiments are directed to devices and method for operating a charge pump. A method may include activating a first switch coupled between a capacitor and a ground voltage over a first period of a charging phase. The first period may coincide with a non-overlapping time between the charging phase and an output phase. The method may also include activating a second switch coupled between the capacitor and an input voltage over a second period of the charging phase, wherein the first period begins prior to the second period. Further, the method may include deactivating the second switch over a third period of the charging phase and deactivating the first switch over a fourth period of the charging phase, wherein the third period begins prior to the fourth period. | 04-17-2014 |
20140103898 | APPARATUS AND METHOD FOR CONTROLLING INDUCTOR CURRENT IN A SWITCH MODE POWER SUPPLY - Apparatus and method for controlling inductor current in a switch mode power supply. In one embodiment, a switch mode power supply includes an inductor, a high-side switch coupled to the inductor, a low-side switch coupled to the inductor, and a controller. The controller is coupled to at least one of the high-side switch and the low-side switch. The controller includes a first capacitor and a current source. The controller is configured to control timing of current switching to the inductor by enabling current flow through the at least one of the high-side switch and the low-side switch based on time to charge the first capacitor via the current source. The time is a function of voltage across the inductor. | 04-17-2014 |
20140103899 | BUCK CONVERTER WITH SINGLE STAGE - The present disclosure provides a mirror device with illumination comprising a transparent conductive substrate, an isolation layer, a mirror layer and a light emitting diode (LED) layer. The isolation layer, formed on a surface of the transparent conductive substrate, divides the surface of the transparent conductive substrate into at least one first region and at least one second region. The mirror layer formed on the transparent conductive substrate within the at least one first region, while the LED layer is formed on the transparent conductive substrate within the at least one second region, wherein the mirror layer and the LED layer are electrically isolated from each other. In another embodiment, the present disclosure further provides a mirror box having the mirror device with illumination disposed therein so that the mirror device can be easily carried and kept in the pocket, or purse of user. | 04-17-2014 |
20140139201 | LOW-POWER VOLTAGE TAMPER DETECTION - Systems and methods for low-power voltage tamper detection are described. In some embodiments, an integrated circuit may include source-follower circuitry configured to produce a scaled down supply voltage. The integrated circuit may also include undervoltage detection circuitry coupled to the source-follower circuitry, the undervoltage detection circuitry configured to output a first signal having a first logic value if the scaled down supply voltage is greater than a low threshold voltage or a second logic value if the scaled down supply voltage is smaller than the low threshold voltage. Additionally or alternatively, the integrated circuit may include overvoltage detection circuitry coupled to the source-follower circuitry, the overvoltage detection circuitry configured to output a second signal having the first logic value if the scaled down supply voltage is smaller than a high threshold voltage or the second logic value if the scaled down supply voltage is greater than the high threshold voltage. | 05-22-2014 |
20140145699 | SYSTEMS AND METHODS FOR CONTROLLING POWER IN SEMICONDUCTOR CIRCUITS - A power control circuit includes a plurality of transistors coupled between a power supply node and a gated power supply node, wherein the gate electrode of a first transistor of the plurality of transistors is coupled to receive a power control signal, wherein, in response to assertion of the power control signal, the first transistor is placed into a conductive state; a first voltage comparator, wherein, in response to assertion of the power control signal, places a second transistor of the plurality of transistors in a conductive state when a voltage on the gated voltage supply node reaches a first reference voltage; and a second voltage comparator, wherein, in response to assertion of the power control signal, places a third transistor of the plurality of transistors in a conductive state when the voltage on the gated voltage supply node reaches a second reference voltage different from the first reference voltage. | 05-29-2014 |
20140145700 | Controlled Switch - The invention proposes a voltage regulating device having a switch in an electrical circuit between a first node ( | 05-29-2014 |
20140152287 | SYNCHRONOUS DC-DC CONVERTER HAVING SOFT-STOP FUNCTION - A synchronous DC-DC converter having a soft-stop function includes an output stage for supplying an output voltage, wherein the output stage includes a high-side transistor for charging the output voltage and a low-side transistor for discharging the output voltage; an output control circuit, coupled to the output stage, for controlling the high-side transistor and the low-side transistor of the output stage; at least one protection device, for controlling the high-side transistor to be turned off when a specific situation occurs, in order to stop supplying the output voltage; and a soft-stop control circuit, coupled to the output control circuit, for controlling the low-side transistor of the output stage to be turned on when the protection device controls the high-side transistor to be turned off or the synchronous DC-DC converter is disabled, in order to discharge the output voltage. | 06-05-2014 |
20140159696 | UNIVERSAL POWER SUPPLY APPARATUS - There is provided a universal power supply apparatus including a power supply unit switching input power into driving power having a preset voltage level and supplying the driving power, a power recognition unit outputting a recognition voltage having a preset voltage level to an output terminal from which the power is output to recognize connection of a device, controlling a power output of the power supply unit according to a detected rated output, and recognizing disconnection of the device after the connection of the device according to a power state of the driving power of the power supply unit, and a detection unit providing a detection voltage having a preset voltage level to the output terminal. | 06-12-2014 |
20140159697 | PROTECTION CIRCUIT FOR PROTECTING A HALF-BRIDGE CIRCUIT - The present invention relates to a protection circuit for protecting a half-bridge circuit. The protection circuit detects an incorrect response of the half-bridge by monitoring the current of a first switch at a series resistor of a second switch. The protection circuit has a detector for detecting the voltage across the resistor and an evaluation circuit which is designed in such a manner that it evaluates an output signal from the detector after the first switch has been switched on and provides a fault signal at an output when the voltage across the resistor is greater than the threshold voltage. | 06-12-2014 |
20140159698 | MATRIX CONVERTER - A matrix converter includes input terminals, output terminals, a power conversion circuit, and a snubber circuit. The power conversion circuit includes bidirectional switches of which each includes antiparallel connection circuits connected serially. The snubber circuit is connected to the bidirectional switches. The snubber circuit includes first diodes, a capacitor, a second diode, and third diodes. The first diodes are respectively corresponded to the bidirectional switches. A first connecting point of each the first diode is connected to a connection point between the two unidirectional switching elements constituting the bidirectional switch. A first connecting point of the capacitor is connected to a second connecting point of each the first diode. First and second connecting points of the second diode are connected to a second connecting point of the capacitor and the corresponding output terminal. The bidirectional switches, the first diodes, and the second diode are arranged in one power module. | 06-12-2014 |
20140167724 | SELF-POWERED SOURCE DRIVING CIRCUIT AND SWITCHING POWER SUPPLY THEREOF - In one embodiment, a source driving circuit configured for a switching power circuit, can include: (i) a source transistor coupled between a source of a main power transistor and ground, where the source transistor can be controlled by a PWM control signal; (ii) the main power transistor being on when the source transistor is on and a gate-source voltage of the main power transistor exceeds a conduction threshold voltage; (iii) a source diode having an anode coupled to the main power transistor source, and a cathode coupled to a delay circuit and a power supply capacitor; and (iv) the delay circuit controlling the main power transistor to turn off a delay time after the source transistor is turned off, where the delay time allows charging of the power supply capacitor such that a voltage across the power supply capacitor is at least a level of a reference voltage. | 06-19-2014 |
20140167725 | CURRENT CONTROL CIRCUIT AND METHOD - The invention provides a current control circuit and a current control method. The current control circuit controls a current supplied to a current-controlled device according to a conduction control signal. The current control circuit includes: a conduction control switch coupled to the current-controlled device, for determining whether to conduct the current according to the conduction control signal; and a plurality of current control switches connected to one another in series and coupled to the conduction control switch, for controlling a magnitude of the current. | 06-19-2014 |
20140167726 | ENERGY STORAGE ARRANGEMENT AND ALTERNATING LOAD CONSUMER - An energy storage arrangement for an electric load which exchanges electrical power with an energy supply network, has two connections in the form of a load to the parallel circuit and for the energy supply network, a converter which is switched between the connections, is voltage-impressed and contains an energy store. The energy store is designed to store an energy amount which exceeds that necessary for the regular operation of the converter by a multiple. An arc furnace which is fed as a load from an energy supply network contains such an energy storage arrangement. | 06-19-2014 |
20140167727 | Power Control System - A power control system includes a first switch configured to receive electrical power from a power source and selectably provide the electrical power to a load. A current limiter is intermediate the first switch and the load. A second switch is also configured to receive electrical power from the power source and selectably provide electrical power to the load. The power control system includes a soft-start operating mode wherein the first switch is activated to provide the electrical power to the load, current provided to the load being limited by the current limiter. The second switch is also activated to provide the electrical power to the load, the second switch being activated a predetermined period of time after activation of the first switch. The first and second switches are also deactivated while the voltage of the power source exceeds a predetermined level. | 06-19-2014 |
20140176110 | Output Driver Having Reduced Electromagnetic Susceptibility and Associated Methods - An electronic circuit includes a driver circuit having an output terminal that can be coupled to a load to drive the load. A control circuit may be coupled to the driver circuit for controlling the driver circuit. A transistor may be coupled in series between the driver circuit and the output terminal. The transistor may have a first terminal coupled to the driver circuit and a second terminal coupled to the output terminal. A biasing circuit may be coupled to a gate terminal of the transistor and configured to bias the transistor to a conducting state. The biasing circuit may have sufficient drive strength to maintain the transistor in the conducting state in the presence of electromagnetic interference. | 06-26-2014 |
20140176111 | VOLTAGE CONTROL CIRCUIT WITH TEMPERATURE COMPENSATION FUNCTION - There is provided a voltage control circuit that is applicable to a LED device, a power supply or the like. The voltage control circuit includes: a voltage dividing unit dividing a supply voltage into a first voltage and a second voltage different from each other; a shunt regulator adjusting the first voltage according to the second voltage; and an output circuit unit outputting the voltage regulated by the shunt regulator. | 06-26-2014 |
20140184190 | AC TO AC CONVERTER AND METHOD OF OPERATION THEREOF FOR SOFT STARTING MOTORS AND OTHER APPLICATIONS - A load control device includes an input and an output connectable to an AC source and an AC load, respectively, with one or more supply lines each corresponding to a phase in the load connecting the input and output. Line-side switches are connected between a line terminal and load terminal, and floating-neutral side switches are connected to the load terminal at one end and at a common neutral connection at another end. A controller determines a direction of current flow on each of the supply lines, determines a switching pattern for each of the line-side switches and each of the floating-neutral side switches based on the determined direction of current flow, and causes each of the line-side switches and floating-neutral side switches to operate in an On condition or an Off condition according to the determined switching pattern, such that a controlled uninterrupted current is provided to the AC load. | 07-03-2014 |
20140191745 | APPARATUS AND METHOD FOR MITIGATING PERTURBATIONS IN A POWER CONVERTER - A power converter includes a plurality of switches that interconnect first and second input terminals of the power converter with first and second output terminals of the power converter. The switches are switched to convert power from the input terminals to the output terminals. During the switching, voltage spikes are mitigated by a first RLC branch connected from the first input terminal to the first output terminal and by a second RLC branch connected from the second input terminal to the second output terminal. | 07-10-2014 |
20140197814 | PROGRAMMABLE FREQUENCY RANGE FOR BOOST CONVERTER CLOCKS - Techniques for generating a boost clock signal for a boost converter from a buck converter clock signal, wherein the boost clock signal has a limited frequency range. In an aspect, the boost clock signal has a maximum frequency determined by Vbst/T, wherein Vbst represents the difference between a target output voltage and a battery voltage, and T represents a predetermined cycle duration. The boost converter may include a pulse insertion block to limit the minimum frequency of the boost clock signal, and a dynamic blanking/delay block to limit the maximum frequency of the boost clock signal. Further techniques are disclosed for generally implementing the minimum frequency limiting and maximum frequency limiting blocks. | 07-17-2014 |
20140210447 | DYNAMIC SWITCH SCALING FOR SWITCHED-MODE POWER CONVERTERS - Techniques for optimizing the trade-off between minimizing switching losses and minimizing conduction losses in a buck converter. In an aspect, each of a high-side switch and a low-side switch may be implemented as a plurality of parallel-coupled transistors, each transistor having an independently controllable gate voltage, allowing adjustment of the effective transistor size. In response to the target voltage of the buck converter corresponding to a relatively high voltage range, more high-side switch transistors and fewer low-side switch transistors may be selected. Similarly, in response to the target voltage corresponding to a relatively low voltage range, more low-side switch transistors and fewer high-side switch transistors may be selected. In an aspect, the techniques may be applied during a pulse-frequency modulation mode. | 07-31-2014 |
20140232368 | ELECTRIC POWER CONVERSION WITH ASSYMETRIC PHASE RESPONSE - The disclosure is directed to a multi-phase electric power conversion device coupled between a power source and a load. The device includes a first regulator phase and a second regulator phase arranged in parallel, so that a first phase current and a second phase current are controllably provided in parallel to satisfy the current demand requirements of the load. Each phase current is based on current generated in an energy storage device within the respective phase. The regulator phases are asymmetric in that the energy storage device of the second regulator phase is configured so that its current can be varied more rapidly than the current in the energy storage device of the first regulator phase. | 08-21-2014 |
20140253086 | Using Synchronous Converter in Asynchronous Mode to Prevent Current Reversal During Battery Charging - Efficiency of a switch mode power supply (SMPS) is optimized by operating the SMPS in an asynchronous mode when current being supplied therefrom is less than a certain current value and operating the SMPS in a synchronous mode when the current being supplied therefrom is equal to or greater than the certain current value. When the SMPS is operating in the synchronous mode high-side and low-side power transistors alternately turn on and off. When the SMPS is operating in the asynchronous mode only the high-side power transistor turns on and off and the low-side power transistor remains off. When charging a battery with the SMPS discharge of the battery is eliminated when operating in the asynchronous mode at a low current output. | 09-11-2014 |
20140266130 | Voltage Regulators with Kickback Protection - The subject matter of this document can be embodied in a method that includes a voltage regulator having an input terminal and an output terminal. The voltage regulator includes a high-side transistor between the input terminal and an intermediate terminal, and a low-side transistor between the intermediate terminal and ground. The voltage regulator includes a low-side driver circuit including a capacitor and an inverter. The output of the inverter is connected to the gate of the low-side transistor. The voltage regulator also includes a controller that drives the high-side and low-side transistors to alternately couple the intermediate terminal to the input terminal and ground. The controller is configured to drive the low-side transistor by controlling the inverter. The voltage regulator further includes a switch coupled to the low-side driver circuit. The switch is configured to block charge leakage out of the capacitor during an off state of the low-side transistor. | 09-18-2014 |
20140266131 | Power Converter Circuit - A power converter circuit includes an input and an output. A supply circuit is configured to receive an input signal from the input and to generate a number of supply signals from the input signal. A number of converter units are provided. Each of the plurality of converter units is configured to receive one of the plurality of supply signals and to output an output signal to the output. | 09-18-2014 |
20140266132 | RECONFIGURABLE SWITCHED CAPACITOR POWER CONVERTER TECHNIQUES - An apparatus for converting a first voltage into a second voltage includes a reconfigurable switched capacitor power converter having a selectable conversion gain. converter includes a cascade multiplier switched capacitor network having capacitors, each of which electrically connects to a stack node and to a phase node. A controller causes the network to transition between first and second operation modes. In the first mode, at least one capacitor is isolated from a charge transfer path of the reconfigurable switched capacitor power converter. Consequently, in the first mode of operation, the power converter operates with a first gain. In the second mode, the power converter operates with a second conversion gain. Meanwhile, a third voltage across the at least one capacitor is free to assume any value. | 09-18-2014 |
20140266133 | POWER CONVERTING CIRCUIT AND CONTROL CIRCUIT THEREOF - A power converting circuit includes an upper gate switch, a transistor, a current source circuit, a comparator circuit, a delay circuit, and a pulse width modulation signal generating circuit. The transistor and the current source circuit provide a reference signal. The comparator circuit generates a comparing signal according to the reference signal and an output signal provided by the upper gate switch. The delay circuit generates a delay signal according to the comparing signal and a clock signal. The pulse width modulation signal generating circuit generates a control signal for the upper gate switch according to the delay signal and the clock signal for configuring the conduction status of the upper gate switch. The power converting circuit adjusts the conduction time of the upper gate switch according to the reference signal and the output signal. | 09-18-2014 |
20140266134 | SOFT START SYSTEMS AND METHODS FOR MULTI-STAGE STEP-UP CONVERTERS - A control circuit for a step-up converter includes a soft start module configured to control states of N transistor pairs of the step-up converter, where N is an integer greater than two. A driver module is in communication with the soft start module and configured to generate a first signal when N transistor pairs of the step-up converter are ready to switch. A first charging circuit is configured to charge (N−1) capacitors of the step-up converter to an input voltage of the step-up converter in response to the first signal and to generate a second signal when charging is complete. A second charging circuit is configured to sequentially charge the (N−1) capacitors of the step-up converter to (N−1) predetermined voltage values in response to the first signal and the second signal and before operation of the step-up converter begins. | 09-18-2014 |
20140266135 | MULTI-LEVEL STEP-UP CONVERTER TOPOLOGIES, CONTROL AND SOFT START SYSTEMS AND METHODS - A multi-level, step-up converter circuit includes an inductor including one terminal in communication with an input voltage supply. N transistor pairs are connected in series, where N is an integer greater than one. First and second transistors of a first pair of the N transistor pairs are connected together at a node. The node is in communication with another terminal of the inductor. Third and fourth transistors of a second pair of the N transistor pairs are connected to the first and second transistors, respectively. (N−1) capacitors have terminals connected between the N transistor pairs, respectively. An output capacitor has a terminal in communication with at least one transistor of the N transistor pair. | 09-18-2014 |
20140266136 | HYBRID DIGITAL PULSE WIDTH MODULATION (PWM) BASED ON PHASES OF A SYSTEM CLOCK - Pulse width modulation (PWM) based on selectable phases of a system clock may be implemented with respect to leading-edge-modulation (LEM), trailing-edge-modulation (TEM), and/or dual-edge-modulation. An initial pulse may be generated based on a duty command, synchronous with the system clock, and may be registered with a D flip-flop under control of a selected phase of the system clock. Alternatively, a target count may be derived from the duty command, and an edge of the PWM pulse may be initiated when a count of the selected phase equals the target count. The pulse edge may be registered by a D flip-flop to a SR flip-flop under control of the selected phase. The phases of the system clock may be shared amongst multiple systems to generate multiple PWM signals. A system may include a DLL and digital logic, which may consist essentially of combinational logic and registers. | 09-18-2014 |
20140285174 | CIRCUIT FOR DC-DC CONVERSION WITH CURRENT LIMITATION - A circuit for DC-DC conversion with current limitation comprises a DC-DC converter ( | 09-25-2014 |
20140292302 | SEMICONDUCTOR SWITCH CIRCUIT - A semiconductor switch circuit includes a switch between an input node and an output node that connects nodes to each other according to a control signal and a level shifter outputting the control signal at a boosted level that is greater than a power supply voltage level. The semiconductor switch circuit also includes a booster circuit to output a boosted voltage at the boosted level higher than a power supply voltage level. A control circuit is configured to control the level shifter output of the control signal to the switch. A capacitance switching circuit is included to change the capacitance of a connection between the booster circuit and the level shifter. The capacitance switching circuit can vary capacitance according to the voltage level of the booster circuit output. | 10-02-2014 |
20140306683 | ADAPTIVE DIGITAL PULSE WIDTH MODULATION GENERATOR FOR BUCK CONVERTERS - Systems and methods are disclosed to control a buck converter by performing adaptive digital pulse width modulation (ADPWM) with a plurality of upper power transistors each uniquely controlled to enable greater than 100% duty cycle for the buck converter and a lower power transistor coupled to the plurality of upper power transistors; and driving an inductor having one end coupled to the lower power transistor and the upper power transistors. | 10-16-2014 |
20140306684 | VOLTAGE CONVERTING DEVICE - A voltage converting device includes first and second stage circuits for converting a differential voltage to an output signal that has a magnitude smaller than the differential voltage. The second stage circuit includes input transistors for receiving voltages from the first stage circuit, output transistors for outputting the output signal, and a clamp module to clamp voltages at the input transistors of the second stage circuit. | 10-16-2014 |
20140306685 | SEQUENCE CIRCUIT - A sequence circuit includes a power output terminal, first to third power input terminals, first to sixth resistors, first to tenth filed effect transistors (FETs), first to third inductors, a first capacitor, a second capacitor, and first to third drivers. The sequence circuit ensures that different voltages work in a correct sequence. | 10-16-2014 |
20140312873 | ESTIMATING AND MONITORING THE EFFECTS OF TRANSISTOR AGING - One embodiment of the present invention sets for a method for monitoring the aging of a circuit. The method includes operating an aging unit included in the circuit beginning at a first time. The method also includes in response to a trigger event, operating a non-aging unit also included in the circuit beginning at a second time wherein the second time is subsequent to the first time. The method further includes detecting a frequency difference between a first frequency generated by the aging unit and a second frequency generated by the non-aging unit. The method also includes generating a modified power supply voltage based on the frequency difference. The method also includes applying the modified power supply voltage to the non-aging unit. | 10-23-2014 |
20140312874 | METHOD AND APPARATUS FOR DETERMINING A TARGET LIGHT INTENSITY FROM A PHASE-CONTROL SIGNAL - A dimmable ballast circuit for a compact fluorescent lamp controls the intensity of a lamp tube in response to a phase-control voltage received from a dimmer switch. The ballast circuit comprises a phase-control-to-DC converter circuit that receives the phase-control voltage, which is characterized by a duty cycle defining a target intensity of the lamp tube, and generates a DC voltage representative of the duty cycle of the phase-control voltage. Changes in the duty cycle of the phase-control voltage that are below a threshold amount are filtered out by the converter circuit, while intentional changes in the duty cycle of the phase-control voltage are reflected in changes in the target intensity level and thereby the intensity level of the lamp tube. | 10-23-2014 |
20140320105 | APPARATUS AND METHOD FOR CONTROLLING PULSE OUTPUT - The present invention provides a pulse modulating power source, which comprises: a plurality of discharging modules connected in series during discharging; a plurality of triggers corresponding to said plurality of discharging modules, wherein each trigger provides a trigger signal to the corresponding discharging module to turn it on; a control logic module for controlling the trigger signals so as to turn on said plurality of discharging modules successively with a time delay; an output terminal for outputting a voltage. | 10-30-2014 |
20140320106 | POWER SUPPLY CIRCUIT - A power supply circuit comprises an under voltage protection unit and a voltage conversion unit electrically connected to the under voltage protection unit. The under voltage protection unit and the voltage conversion unit are electrically connected to a power supply. When a voltage of the power supply is in a normal range, the under voltage protection unit outputs a first control signal to the voltage conversion unit. The voltage conversion unit converts the voltage of the power supply into an operation voltage, and outputs the operation voltage. When the voltage of the power supply is less than a threshold voltage, the under voltage protection unit outputs a second control signal to the voltage conversion unit, and the voltage conversion unit does not operate. | 10-30-2014 |
20140320107 | DC/DC Converter, Power Supply Circuit, And Semiconductor Device - Provided is a DC-DC converter with improved power conversion efficiency. A transistor which is incorporated in the DC-DC converter and functions as a switching element for controlling output power includes, in its channel formation region, a semiconductor material having a wide band gap and significantly small off current compared with silicon. The transistor further comprises a back gate electrode, in addition to a general gate electrode, and a back gate control circuit for controlling a potential applied to the back gate electrode in accordance with the output power from the DC-DC converter. The control of the potential applied to the back gate electrode by the back gate control circuit enables the threshold voltage to decrease the on-state resistance when the output power is high and to increase the off-state current when the output power is low. | 10-30-2014 |
20140340067 | OUTPUT VOLTAGE VARIATION REDUCTION - A method of reducing voltage variations in a power supply may include generating an intermediate voltage and setting a first-transistor gate voltage at a first-transistor gate of a first transistor of the power supply based on the intermediate voltage. The method may also include setting an output voltage at an output node of the power supply based on a second-transistor gate voltage at a second-transistor gate of a second transistor. Additionally, the method may include setting the second-transistor gate voltage based on the first-transistor gate voltage such that the output voltage is based on the intermediate voltage, a first-transistor threshold voltage of the first transistor, and a second-transistor threshold voltage of the second transistor and such that variations in the first-transistor threshold voltage and the second-transistor threshold voltage at least partially cancel each other out. | 11-20-2014 |
20150028839 | HIGH EFFICIENCY SWITCHED CAPACITOR VOLTAGE REGULATOR - A high efficiency switched capacitor voltage regulator circuit and a method of efficiently generating an enhanced voltage from an input voltage supply. An input voltage Vin from a main power source is the base voltage to be pumped to an enhanced voltage. Auxiliary voltage sources V1 and V2 are from sources (or grounds) available in the system. During phase 1 of a clock signal, a pump capacitor is charged to ΔV=V2−V1. During phase 2 of the clock signal, the pump capacitor is connected in series between Vin and an output capacitor, resulting in the sum voltage V=Vin+ΔV being generated across the output capacitor. | 01-29-2015 |
20150028840 | CONTROL OF AN INDUCTIVE LOAD BY PULSE WIDTH MODULATION - Method and device for controlling an inductive load by pulse width modulation, on the basis of a periodic set point control signal having a given set point duty cycle. The set point control signal is, in each period of the set point control signal, in a first logic state determined from the high and low logic states for at least a first duration, and is in the other logic state during the rest of the period. Control signals are generated for activating the inductive load, on the basis of the set point control signal. With the aid of a first counter, the first duration (t0) is determined on the basis of the set point control signal. Via a second counter, a second duration (t0−td2) is determined, for which a logic signal corresponding to an effective control signal observed in the load is in the first determined logic state. | 01-29-2015 |
20150028841 | DC/DC CONVERTER - A DC/DC converter has an active energy store, such as an inductance, which can be periodically charged and discharged by one or more semiconductor switches, such as transistors. To avoid voltage overshoot, an RCD element is provided for at least one semiconductor switch, wherein a capacitor and a diode of the RCD element are connected in series, and a resistor of the RCD element can be connected either in parallel with the diode or disconnected from the diode by a switch. The diode of the RCD element is arranged so as to be blocking in the conducting direction of the semiconductor switch. | 01-29-2015 |
20150042305 | INDUCTIVE BUCK-BOOST-CONVERTER AND METHOD FOR DRIVING AN INDUCTIVE BUCK-BOOST-CONVERTER - In one embodiment an Inductive buck-boost-converter has an input (In) to which an input voltage (Vin) is supplied, an output (Out) at which an output voltage (Vout) is provided as a function of the input voltage (Vin), an inductor (L) having a first and a second terminal (Lx | 02-12-2015 |
20150097546 | BIDIRECTIONAL DC-DC CONVERTER - A bidirectional converter circuit includes a voltage source which provides an input voltage, an energy storage set connected to the voltage source and receives the input voltage, a switch set connected to the energy storage set, wherein the switch set includes a first switch and a second switch; an operating switch set connected to the switch set, wherein the operating switch set includes a first operating switch, a second operating switch, a third operating switch and a fourth operating switch. The bidirectional converter further includes a blocking capacitor set and a (input/output) capacitor set. Wherein, the blocking capacitor set is connected to the switch set and the operating switch set. The first operating switch and the second operating switch are driven complementarily with the first switch, and the third operating switch and the fourth operating switch are driven complementarily with the second switch. | 04-09-2015 |
20150102797 | MATRIX CONVERTER - A matrix converter includes: a power convertor that includes a plurality of bidirectional switches configured to control a conducting direction using a plurality of switching elements; a command generator configured to generate a control command for a PWM control on the plurality of switching elements; and a commutation controller configured to perform a commutation control on the plurality of bidirectional switches in a case where the control command changes. In a case where the control command changes during execution of the commutation control, the commutation controller executes a handover step for handover to a next commutation control and then executes the next commutation control from a step in a course of the next commutation control. | 04-16-2015 |
20150130440 | DC-DC CONVERTER - A DC-DC converter includes a voltage conversion circuit boosting a voltage of a DC power supply and supplying the voltage to a load, a bypass circuit provided in parallel to the voltage conversion circuit, a drive circuit turning on and off a switching element of the bypass circuit, and a controller outputting a control signal for controlling the voltage conversion circuit and the drive circuit. A diode is connected in parallel to the switching element so as to be oriented toward a forward direction with respect to the DC power supply. A temperature detector of the drive circuit detects temperature of the diode. The drive circuit maintains the switching element in the on state irrespective of the control signal of the controller when the temperature detector detects a temperature greater than or equal to a predetermined value. | 05-14-2015 |
20150137788 | Buck Circuit - An apparatus may be provided. The apparatus may comprise a first circuit portion, a second circuit portion, and a third circuit portion. The first circuit portion may comprise a voltage supply having an input voltage level (V | 05-21-2015 |
20150303797 | SIGNAL TRANSMISSION CIRCUIT - A signal transmission circuit with a first circuit in a signal transmission side having first and second semiconductor switch elements transmitting a reference potential or power supply voltage of the first circuit to a second circuit by being alternatively driven on and off according to a multiple of signals. The second circuit in a signal reception side having a voltage conversion circuit, including an in-phase noise filter that eliminates in-phase noise superimposed on the voltage transmitted via the first and second semiconductor switch elements, generating first and second pulse signals in accordance with the transmitted voltage, a latch circuit latching each of the first and second pulse signals with the first and second pulse signals as a clock, and a signal analysis circuit analyzing the first and second pulse signals latched by the latch circuit, and generating an output signal according to the category of the multiple of signals. | 10-22-2015 |
20150303811 | SIGNAL TRANSMISSION CIRCUIT - Included are an output circuit, provided in a high side circuit, that selectively generates and outputs multiple kinds of pulse signal in accordance with the level of priority of a multiple of signals, a switch element, driven so as to be turned on and off by a pulse signal output from the output circuit, that is turned on and off to transmit the power supply voltage of the high side circuit to a low side circuit, a voltage conversion circuit, provided in the low side circuit, that converts the power supply voltage transmitted via the switch element into a pulse signal in the low side circuit, and a signal analysis circuit that analyzes the pulse signal obtained via the power conversion circuit and restores the multiple of signals. | 10-22-2015 |
20150333628 | BRIDGE DRIVER FOR A SWITCHING VOLTAGE REGULATOR - Described is an apparatus which comprises: a low-side switch coupled to an output node for providing regulated voltage supply; and a first driver operable to cause the low-side switch to turn off when the output node rises above a first transistor threshold voltage. Described is also a voltage regulator which comprises: a signal generator to generate a pulse-width modulated (PWM) signal; a bridge having a low-side switch coupled to an output node for providing regulated voltage supply according to the PWM signal; a first driver operable to cause the low-side switch to turn off when the output node rises above a first transistor threshold voltage; and a bridge controller to provide control signals to the first driver. The voltage regulator may operate without diode clamps and its operation is self-timed. The voltage regulator also provides tolerance against process variation. | 11-19-2015 |
20150355662 | Power Gating in an Electronic Device - An electronic device | 12-10-2015 |
20150381047 | SOFT-SWITCHING BI-DIRECTIONAL POWER CONVERTER AND METHOD OF OPERATING THE SAME - A soft-switching bi-directional power converter includes a main inductor, a bi-directional switch module, a first switch module, a second switch module, and a control unit. The bi-directional switch module has a bi-directional switch and a resonance inductor. The first switch module has a first switch and a first resonance capacitor; the second switch module has a second switch and a second resonance capacitor. When the bi-directional switch is controlled to occur a resonance of the resonance inductor and the first and the second resonance capacitors so that a voltage of the first resonance capacitor drops to zero, the first switch is turned; when the bi-directional switch is controlled to occur a resonance thereof so that a voltage of the second resonance capacitor drops to zero, the second switch is turned on. Accordingly, the power converter can implement the bi-directional soft switching function. | 12-31-2015 |
20160020695 | POWER DISTRIBUTION SYSTEM AND METHOD - An exemplary power distribution system includes multiple power modules and a controller. The multiple power modules are coupled in parallel to supply power to a load. The controller is configured to provide a total number of the power modules and unique numbers to each member of the power modules. At least a member of the multiple power modules is set up to independently determine its own ON status and OFF status based on the total number and the unique numbers when the power distribution system is in operation, wherein an ON | 01-21-2016 |
20160103464 | Powering of a Charge with a Floating Node - A circuit includes a current source series-connected with a load between first and second terminals and an element coupled in parallel with the load between the first and second terminals. A value of a current in the current source is controlled based on a current flowing in the element between the first and second terminals. The value of the current in the current source is controlled proportional to power consumption in the load based on the current flowing in the element between the first and second terminals. The element is used to limit a voltage across the load while the value of the current is being controlled. | 04-14-2016 |
20160109896 | SEMICONDUCTOR DEVICE - In order to reduce parasitic inductance of a main circuit in a power supply circuit, a non-insulated DC-DC converter is provided having a circuit in which a power MOS·FET for a high-side switch and a power MOS·FET for a low-side switch are connected in series. In the non-insulated DC-DC converter, the power MOS·FET for the high-side switch is formed by a p channel vertical MOS·FET, and the power MOS·FET for the low-side switch is formed by an n channel vertical MOS·FET. Thus, a semiconductor chip formed with the power MOS·FET for the high-side switch and a semiconductor chip formed with the power MOS·FET for the low-side switch are mounted over the same die pad and electrically connected to each other through the die pad. | 04-21-2016 |
20160118883 | SIMO (SINGLE INDUCTOR MULTIPLE OUTPUT) BIDIRECTIONAL DUAL-BOOST ARCHITECTURE - A switching power converter circuit comprises an input port, a first circuit supply rail having a first positive voltage greater than circuit ground, a second circuit supply rail having a second positive voltage greater than circuit ground, and an inductor electrically coupled to the input port, wherein inductor current flows in a first direction through the inductor to generate the first circuit supply rail and flows in an opposite direction through the inductor to generate the second circuit supply rail. | 04-28-2016 |
20160149478 | RECONFIGURABLE SWITCHED CAPACITOR POWER CONVERTER TECHNIQUES - An apparatus for converting a first voltage into a second voltage includes a reconfigurable switched capacitor power converter having a selectable conversion gain. The power converter has switch elements configured to electrically interconnect capacitors to one another and/or to the first or second voltage in successive states. The switch elements are configured to interconnect at least some capacitors to one another through the switch elements. A controller causes the reconfigurable switched capacitor power converter to transition between first and second operation modes. The controller minimizes electrical transients arising from transition between modes. In the first operating mode, the power converter operates with a first conversion gain. In the second operating mode, it operates with a second conversion gain. | 05-26-2016 |
20160163447 | CIRCUIT BOARD AND POWER CONVERSION APPARATUS HAVING CIRCUIT BOARD - The present invention discloses a circuit board, including a substrate and a magnetic core, where the magnetic core is embedded into the substrate, at least one turn of a winding conductor wound around the magnetic core is arranged on the substrate, each turn of the winding conductor includes a first end-surface conductor and a second end-surface conductor that are separately arranged on two ends of the magnetic core, and each turn of the winding conductor further includes a first side-surface conductor that penetrates through the magnetic core from an inner side of the magnetic core and a second side-surface conductor that penetrates through the magnetic core from an outer side of the magnetic core. The circuit board and the power conversion apparatus having the circuit board provided by the present invention, achieve larger inductance, save materials, and reduce cost for fabricating a power conversion apparatus. | 06-09-2016 |
20160187913 | POWER SUPPLY SYSTEM - A power supply system for an electronic device includes a first interface, a first switch, and a second switch. When the electronic device is not connected to the first interface, the switch circuit receives a first voltage level switch control signal based upon output of the first interface, the first switch turns on and outputs a second voltage level power control signal to the second switch, the second switch turns off and does not provide power to the electronic device via the first interface. When the electronic device is connected to the first interface, the switch circuit receives a second voltage level switch control signal based upon output of the first interface, the first switch turns off and outputs a first voltage level power control signal to the second switch, the second switch turns on and provides power supply to the electronic device via the first interface. | 06-30-2016 |
20170237336 | SOFT START SYSTEMS AND METHODS FOR MULTI-LEVEL STEP-UP CONVERTERS | 08-17-2017 |