| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 323351000 | Switched (e.g., switching regulators) | 62 |
| 20080203995 | Methods of discharge control for a battery pack of a cordless power tool system, a cordless power tool system and battery pack adapted to provide over-discharge protection and discharge control - In a cordless power tool system, a battery pack which may removably attachable to a cordless power tool and to a charger may include at least one battery cell and a power limiting device. The power limiting device may be arranged in series with the at least one battery cell for limiting power output of the battery pack based on the component that is connected to the pack. Current and hence power out of the battery pack may be controlled as a function of total internal impedance in the battery pack, which may be adjusted depending on the component that is connected to the pack. | 08-28-2008 |
| 20080218149 | DISPLAY DEVICE - The present invention is intended to minimize an amount of charge that flows from a step-up circuit into an external input voltage terminal when the power supply is turned off. A display device includes a display panel and a drive circuit that drives pixels included in the display panel. The drive circuit includes a power circuit to which a voltage Vcc is fed. The power circuit includes: a first step-up circuit that generates a voltage DDVDH which is higher than the voltage Vcc; a means | 09-11-2008 |
| 20080258702 | OUTPUT CIRCUIT - An output circuit in accordance with one embodiment of the present invention includes: an input terminal for receiving an input signal; an output transistor connected between a first power supply and an output terminal; a current control circuit connected to the input terminal and the output transistor for controlling current outflow and inflow for the gate of the output transistor based on the input signal; a voltage generating circuit connected to the first power supply; and a switch circuit coupled between the gate of the output transistor and the voltage generating circuit, the switch circuit having alternatively an on state and an off state thereof in response to the input signal; wherein the switch circuit becomes the off state when the potential difference between the gate of the output transistor and the first power supply becomes equal to or below a predetermine value regardless of the voltage level of the input signal. | 10-23-2008 |
| 20080265863 | REFERENCE CURRENT CIRCUIT FOR ADJUSTING ITS OUTPUT CURRENT AT A LOW POWER-SUPPLY VOLTAGE - A reference current circuit includes a differential amplifier amplifying a difference in potential between a reference voltage and a first node and outputting the amplified potential difference to a second node, and adjusting transistors connected between a supply voltage and the first node. The reference current circuit further includes switches provided correspondingly to the adjusting transistors to apply a voltage of the second node to control electrodes of the adjusting transistors in response to control signals that are respectively input to the switches. The reference current circuit further includes a resistance connected between the first node and a common potential, and an output transistor having its conduction state responsive to the voltage of the second node for controlling a current supplied from the supply voltage to a load. | 10-30-2008 |
| 20080278139 | SLEEP CURRENT ADJUSTING CIRCUIT OF SYSTEM ON CHIP - There is provided a sleep current adjusting circuit of a system on chip including: a regulator supplying a turn-on voltage and a normal current when a mode selection signal is a normal mode signal, and a turn-off voltage when the mode selection signal is a sleep mode signal; a switching device turned on by the turn-on voltage of the regulator to supply the normal current from the regulator to a main circuit part and a sleep operation circuit part, respectively, and turned off by the turn-off voltage of the regulator to block the normal current from being supplied to the main circuit part and supply the sleep current to the sleep operation circuit part; and a current limit device limiting an operating current flowing in response to the operating voltage and supplying the sleep current to the sleep operation circuit part. | 11-13-2008 |
| 20080284408 | Sequential calibration of matched current sources - A system involves LED strings and programmable current source circuits (CSC). An LED current flows through each LED string. Each LED current is controlled by an associated programmable CSC. In one embodiment, the CSCs form a chain. A first CSC uses a reference current for calibration, and thereafter supplies the reference current to the next CSC. When the next CSC detects the reference current, it uses the reference current for calibration. CSCs are calibrated one by one down the chain. In a second embodiment, each CSC can receive the reference current from a common conductor. If the common conductor is detected to be available, then the CSC uses the reference current for calibration. When the conductor is in use, the other CSCs detect the conductor as unavailable and do not attempt to self-calibrate. The CSCs use the reference current one by one, but in an order that changes over time. | 11-20-2008 |
| 20080309313 | Systems and methods for providing device-to-device handshaking through a power supply signal - Handshaking circuits are provided in a communications cable and in a device operable to be mated with the communications cable. Before a device can utilize the power supply signal of such a communications channel, the two handshaking circuits must sufficiently identify one another over a power supply signal with a decreased voltage. The decreased voltage allows for a cable plug to be provided with a safe, protected power that cannot cause harm to a human. The decreased voltage also reduces the chance that a device can receive a primary power supply signal from the cable before the device sufficiently identifies itself. Accordingly, a laptop may be connected to a portable music player, but the voltage of the power supply signal provided by the laptop to the cable may be decreased on-cable until the handshaking circuit of the portable music player sufficiently performs a handshaking operation with a on-cable handshaking circuit. | 12-18-2008 |
| 20080315858 | SWITCH MODE POWER SUPPLY APPARATUS HAVING ACTIVE CLAMPING CIRCUIT - A switch mode power supply apparatus includes a transformer, a main switching device to adjust a power supply supplied to a primary coil of the transformer, an active clamping circuit to suppress a voltage stress of the main switching device, and a control circuit to control a clamping operation of the active clamping circuit when the switch mode power supply apparatus is in a standby mode. Therewith, it is possible to significantly reduce power consumption of the switch mode power supply apparatus in the standby mode and improve efficiency of the switch mode power supply apparatus. | 12-25-2008 |
| 20080315859 | Swithgear cell and converter circuit for switching a large number of voltage levels - A switchgear cell is disclosed having a first energy store and a second energy store connected in series therewith, having a first, second, third and fourth power semiconductor switch, which are connected in series, wherein the first, second, third and fourth power semiconductor switch are in each case one drivable bidirectional power semiconductor switch with a controlled unidirectional current-conducting direction. The first power semiconductor switch is connected to the first energy store, and the fourth power semiconductor switch is connected to the second energy store. A third energy store is connected to the junction between the first and the second power semiconductor switch and the junction between the third and the fourth power semiconductor switch. | 12-25-2008 |
| 20090051345 | Self-oscillating switching regulator - A self-oscillating switching regulator includes a control winding N | 02-26-2009 |
| 20090085553 | Reconfigurable battery pack - In some embodiments, a system comprises a voltage regulator having two or more inputs with each having its own input voltage level and at least one switch to select between the input voltage levels, a configurable battery pack comprising at least two cells and at least one switch capable of configuring the battery in either a series configuration or a parallel configuration, a detector to measure a load parameter on the system; and a controller to send a signal to the at least one switch to select between the input voltage levels based on the measured load parameter. | 04-02-2009 |
| 20090121702 | METHODS AND APPARATUS TO PROVIDE SELF-TRACKING PRE-DRIVER CONTROLS - Methods and apparatus for a self-tracking high-side pre-driver control are described. In an example, a method is described comprising charging a first terminal associated with a first capacitive element to a first voltage with respect to ground and a second terminal associated with a second capacitive element to a second voltage with respect to ground, changing the first voltage and the second voltage with respect to ground by changing a swing voltage, selecting one of the first voltage or the second voltage based on a first switched-mode power supply topology or a second switched-mode power supply topology and driving a transistor using the selected voltage. | 05-14-2009 |
| 20090128120 | REFERENCE VOLTAGE GENERATION CIRCUIT, AD CONVERTER, DA CONVERTER, AND IMAGE PROCESSOR - A reference voltage generation circuit includes a plurality of resistors that divide a prescribed input reference voltage into a plurality of divisional voltages and a plurality of analogue switches one of which selects one of the divisional voltages to output the selected divisional voltage as a desired reference voltage. Each of the analogue switches is formed of a transistor, and a size of the transistor is varied corresponding to a level of the reference voltage to be output. | 05-21-2009 |
| 20090140716 | Circuit arrangement for generating a pulse width modulated signal for driving electrical loads - What is described is a circuit arrangement for the pulse width modulated drive of a load connected to a voltage supply line, including:
| 06-04-2009 |
| 20090174389 | MULTI-PHASE POWER SUPPLY CONTROLLER AND METHOD THEREFOR - In one embodiment, a multi-phase power supply controller is configured to an operating status signal and responsively inhibit the PWM controller from forming at least one PWM drive signal of a plurality of PWM drive signals. | 07-09-2009 |
| 20090206819 | DC-DC CONVERTER FOR A LOW POWER ELECTRONIC CIRCUIT - The DC-DC converter ( | 08-20-2009 |
| 20090237065 | Push-On/Push-Off Power-Switching Circuit - An electrical power-switching circuit controls power to an electronic device. In some embodiments, the circuit consists of only transistors, resistors, and capacitors, making it small, low cost, and functional over a wide range of supply voltages. The circuit may be switched on and off by a momentary-contact switch. The circuit can be constructed so that, except for transistor leakage current, no power is consumed in the off state, and the controlled device can shut off its own power. | 09-24-2009 |
| 20090295362 | Voltage boost circuit without device overstress - A voltage boost circuit is driven with a clock signal CLK which toggles between voltages V | 12-03-2009 |
| 20100013453 | DC/DC CONVERTER, COMPUTER SYSTEM HAVING THE SAME, AND DC/DC CONVERSION METHOD - A computer system including the same, and a DC/DC conversion method. The DC/DC converter includes: a filter part receiving an input voltage and outputting an output voltage converted in level from the input voltage; a plurality of switching parts switching so that the input voltage is selectively supplied to the filter part, wherein the switching parts are connected in parallel to the filter part at a phase voltage terminal; and a controller sequentially controlling switching of the plurality of switching parts so that the output voltage reaches a predetermined target value. | 01-21-2010 |
| 20100033157 | MICROWAVE TRANSMISSION LINE DC/DC CONVERTER - A method and an electrical circuit for DC-DC voltage conversion in a network comprising an input voltage terminal, an output voltage terminal, at least one first switch and at least one second switch, at least one input impedance, at least one load impedance and at least one transmission line with known impedance where the electrical circuit is characterized by that the impedance of the at least one transmission line is adapted to be mismatched to at least the load impedance and where at least one of the at least first switches is arranged in relation to the at least one transmission line to switch between open and closed positions for generating a pulse wave propagating in the at least one transmission line charging a load capacitance of the load impedance with electrical energy. | 02-11-2010 |
| 20100052648 | DRIVE CIRCUIT - A drive circuit for a switching circuit has a high-side drive circuit to turn on/off, according to a control signal, a switching element QH arranged on a high side of a DC power source Vin and a low-side drive circuit to turn on/off alternately with the switching element QH according to the control signal a switching element QL arranged on a low side of the DC power source and connected in series with the switching element QH. Ends of an auxiliary power source Vcc | 03-04-2010 |
| 20100085032 | Boost Device for Voltage Boosting - A boost device boosts an input voltage to an output voltage across an output capacitor, and includes first and second output diodes coupled to the output capacitor, and a transformer coupled to first and second switches, first and second switching circuits, and to the first and second output diodes, and receiving the input voltage. The first and second switches are operated alternately in an ON-state, and have overlapping duty cycles. The first and second switching circuits are operable to suppress conduction losses for the first and second switches. The transformer has a bi-directional magnetic circuit. Electric energy is transformed through induced currents of the transformer, and a small amount of energy attributed to an exciting current of the transformer is used for voltage boosting, thereby attaining a relatively high output power. | 04-08-2010 |
| 20100141233 | Switching Voltage Regulator With Frequency Selection - Techniques for mitigating interference from a switching voltage regulator by intelligently varying the switcher frequency of the switching voltage regulator are provided. In one aspect, the switcher frequency is set by adjusting a frequency setting input to a programmable clock divider. In a further aspect, a processor drives a programmable clock divider which receives a value representative of a dividing factor by which to divide a reference clock frequency signal to generate a desired switcher frequency for the switching voltage regulator. Values of the programmable clock divider are selectively varied to achieve optimal performance and mitigate the effect of switcher frequency spurious content for a given operating condition or conditions. | 06-10-2010 |
| 20100164470 | METHOD AND SYSTEM OF IMPROVING MEMORY POWER EFFICIENCY - A method of improving memory power efficiency is disclosed. The method includes the following steps: a ground pin of a memory socket connecting to a power source, the ground pin is connected to a controller; the ground pin outputting a high level signal to the controller when the memory socket is without a memory component; and the controller sending an off-command to a regulator to cut off a supplying power to the memory socket after the controller receives the high level signal. | 07-01-2010 |
| 20100176787 | POWER CONVERTER - A power converter is provided. The power converter comprises an output pin having an address setting function, for flexibly setting a system management bus (SMBus) slave address. As such, the present invention is adapted for saving the amount of the strapping pins employed in the power converter, and thus saving the IC packaging cost. | 07-15-2010 |
| 20100207598 | VOLTAGE CONVERSION DEVICE - A switching frequency setting unit sets switching frequency of a switching element, based on both the temperature of a cooling medium which cools a DC-DC converter and the temperature of a switching element of the DC-DC converter. A switching controller controls the voltage conversion ratio of the DC-DC converter by controlling switching operation of the switching element at the set switching frequency. | 08-19-2010 |
| 20100253317 | SEMICONDUCTOR DEVICE - To include a first X decoder constituted by a transistor whose off-leakage current has a first temperature characteristic, a pre-decoder circuit and a peripheral circuit constituted by a transistor whose off-leakage current has a second temperature characteristic, a power supply control circuit that inactivates the X decoder when a temperature exceeds a first threshold during a standby state, and a power supply control circuit that inactivates the pre-decoder and the peripheral circuit when a temperature exceeds a second threshold during the standby state. According to the present invention, whether power supply control is performed on a plurality of circuit blocks is determined based on different temperatures, therefore optimum power supply control can be performed on each of circuit blocks. | 10-07-2010 |
| 20110062940 | High Efficiency Charge-and-Add Adjustable DC-DC Converter - A charge-and-add DC-DC voltage converter design using a switch network that toggles between two states, either simultaneously charging a flying capacitor (one or any number) or creating a DC voltage on the output capacitor by connecting all flaying capacitors in series thus adding the input voltage to remaining voltages on flying capacitors after they were charged. A pulse generator delivers a train of pulses to toggle the switch network. Depending on the applications, the train of pulses can be continuous when a fixed unregulated voltage must be delivered, or a defined number of pulses when voltage (power) surge is to be produced. The charge-and-add converters should be capable of delivering a regulated output voltage, and in this case, pulse-width modulation (PWM) or pulse frequency modulation (PFM) can be used. | 03-17-2011 |
| 20110068768 | SWITCHING POWER SUPPLY AND RELATED CONTROL METHOD - A switching power supply includes a power switch, an adjusting circuit and a limit signal generator. The power switch operates according to a switch control signal. The adjusting circuit adjusts the turn-on time of the switch control signal according to a limit signal and a detecting signal which corresponds to the current passing the power switch. When the detecting signal exceeds or is equal to the limit signal, the limit signal generator samples a reference signal and updates the limit signal according to the sampled reference signal. | 03-24-2011 |
| 20110068769 | Dimmer Switch With Adjustable High-End Trim - A dimmer switch has a user adjustable high-end trim. The dimmer switch includes a bidirectional semiconductor switch, such as a triac, for controlling the amount of power delivered from a source of alternating current power to a lighting load, such as an electric lamp. A user-adjustable timing circuit controls the conduction time of the triac from a minimum time to a maximum time. The maximum possible conduction time of the triac is the high-end trim. The minimum possible conduction time of the triac is the low-end trim. The timing circuit includes a user-accessible switch that allows a user to reduce the high-end trim from a first nominal level to a second reduced level, lower than the first level, without substantially affecting the low-end trim. The switch allows a user to switch a transient voltage suppressor into and out of parallel connection with a resistor that is part of an RC timing circuit for the triac. The dimmer switch advantageously uses less energy and the lifetime of the lamp is extended when the second reduced level of the high-end trim is selected. | 03-24-2011 |
| 20110080156 | DC/DC converter with depletion-mode III-nitride switches - Disclosed is a buck converter for converting a high voltage at the input of the buck converter to a low voltage at the output of the buck converter. The buck converter includes a control circuitry configured to control a duty cycle of a control switch, the control switch being interposed between the input and the output of the buck converter. A synchronous switch is interposed between the output and ground. The control switch and the synchronous switch comprise depletion-mode III-nitride transistors. In one embodiment, at least one of the control switch and the synchronous switches comprises a depletion-mode GaN HEMT. The buck converter further includes protection circuitry configured to disable current conduction through the control switch while the control circuitry is not powered up. | 04-07-2011 |
| 20110084683 | Low powered activation electronic device - A low powered activation electronic device includes a power source, an electronic circuit, having two spaced apart electrodes, electrically connected to the power source to form an opened circuit, and two fabric contacts made of textile material provided at the two electrodes of the electronic circuit, wherein the electronic circuit is formed a closed circuit to activate the electronic device in responsive to a physical touch by a human operator at the two fabric contacts. | 04-14-2011 |
| 20110115462 | Supply Architecture for Inductive Loads - Apparatus and associated systems and methods may relate to a process for supplying unidirectional current to a load, controlling a reverse electromotive force (REMF), capturing inductive energy from the load, and supplying the captured inductive energy to the load. In an illustrative example, an operating cycle may include a sequence of operations. First, inductive energy captured from the load on a previous cycle may be supplied to the load. Second, energy may be supplied to the load from an external power source. Third, a REMF voltage may be substantially controlled upon disconnecting the power source from the load. Fourth, the load current may be brought to zero by capturing the inductive energy for use on a subsequent cycle. In some embodiments, a single power stage may supply a DC inductive load, or a pair of power stages may be operated to supply bidirectional current to an AC load. | 05-19-2011 |
| 20110140684 | POWER CONTROLLER HAVING EXTERNALLY ADJUSTABLE DUTY CYCLE - A power controller having externally adjustable duty cycle provides an inversely proportional relationship between duty cycle and input voltage and creates a conversion curve associated with the duty cycle and the input voltage. The slope and/or maximal duty cycle of the conversion curve can be dynamically adjusted through an external setting interface according to the specification of the magnetic components adopted in a power conversion circuit. Therefore, saturation of magnetic components is effectively prevented, and magnetic components with optimal specification are easily available to choose. | 06-16-2011 |
| 20110199071 | Circuit Arrangement and Method for Driving a Load - Disclosed is a circuit arrangement and a method for driving a load. | 08-18-2011 |
| 20110215791 | Compensation schemes for the voltage droop of solid-state Marx modulators - A novel design scheme for the compensation circuitry of solid-state Marx modulators has been described for enhancing the compensation ability of the compensation cells of the Marx modulators and simplifying the entire circuitry. High-speed solid-state switches are adopted in the compensation circuitry for the control of the compensation actions. Inductive components and diodes are used in the design scheme to smooth voltage curve. | 09-08-2011 |
| 20110227557 | HIGH-VOLTAGE SWITCHING HOT-SWAP CIRCUIT - Electronic circuits and methods are provided for use in high-voltage, hot-swappable circuit board applications. A pulse-width modulated (PWM) signal biases a switching transistor by way of transformer coupling. The switching transistor operates to charge an inductor. A shut-down transistor is biased to drive the switching transistor into a non-conductive state. Inductor discharge through a diode is sensed and used in generating respective biasing signals. Switching transistor stress, heating and energy wastage are significantly reduced during circuit start-up. | 09-22-2011 |
| 20110285378 | DRIVE DEVICE - When a drive signal that is a PWM input signal is small (when the drive duty component of the PWM drive signal is small), shoot-through (through state) between the upper transistor and lower transistor can occur when there is variation in the drive circuit or transistors. An upper switching device and lower switching device control current supply to a load, and an upper drive circuit and lower drive circuit respectively drive the upper switching device and lower switching device. The upper drive circuit has an input terminal that receives a control signal that turns the upper switching device on or off; an upper source circuit that SOURCE outputs a drive current to the control terminal of the upper switching device according to a first level or second level signal applied to the input terminal; an upper sink circuit that SINK outputs drive current to the control terminal of the upper switching device according to a second level or first level signal applied to the input terminal; an upper sink transistor that sinks capacitive current through the control terminal when the upper switching device is off; an upper interface circuit that generates a first input drive signal to the upper source circuit according to the input terminal signal, and a second input drive signal to the upper sink circuit or the upper sink transistor; and a selector that selectively supplies the second input drive signal to the upper sink circuit or the upper sink transistor based on a signal from the inverter. The lower drive circuit is identically configured. | 11-24-2011 |
| 20110304312 | POWER CIRCUIT FOR REDUCING STANDBY POWER CONSUMPTION - In a power circuit for reducing standby power consumption, a power supply is defined to include a primary power system and a stationary power system. The stationary power system outputs a stationary power after obtaining an input power. A control unit controls ON/OFF of the primary power system, obtains the stationary power as the required power, and receives a PS ON/OFF signal for triggering the control unit, so that the control unit controls the primary power system to supply a primary output power. The power supply includes a switch unit having two ends connected to a power circuit for outputting the stationary power and a virtual load respectively. The PS ON/OFF signal is provided for controlling the switch unit. If the switch unit does not receive the PS ON/OFF signal, it is OFF in a standby mode to avoid unnecessary power consumption of the virtual load. | 12-15-2011 |
| 20110316519 | Load Switch - A semiconductor device, circuit, and AC and DC load switch for maintaining a small input-output differential voltage and providing a defined response. The load switch can include a pass element coupled to an input terminal and an output terminal. The pass element can include a control terminal, with the control terminal controlling a response of the pass element. The load switch can include a first loop coupled to the control terminal configured to control a voltage drop between the input terminal and the output terminal while maintaining high impedance with the pass element. The load switch can include a second loop coupled to the control terminal configured to provide a defined filter response from the input terminal. The defined response can be a low pass response, high pass response, or a band pass response. The passband and/or stopband of the response can be programmed. | 12-29-2011 |
| 20110316520 | Battery Control Circuit - A battery control circuit includes a voltage detection circuit for measuring voltages of electric cells, balancing circuits for balancing the voltages or SOCs of the electric cells, a signal input/output circuit for communicating with the outside, a power supply circuit having two modes: a normal mode and a low consumption mode, and a time management circuit. It receives a signal containing a period of time until the shift of the power supply circuit from the normal mode to the low consumption mode, and stores it in the time management circuit. If a command from the outside has not been sent for a predetermined period of time or when an operation stop command has been sent from the outside, the time management circuit causes the power supply circuit to continuously operate in the normal mode. Then, the battery control circuit monitors an operation continuation period in the normal mode, and causes the power supply circuit to shift to the low consumption mode when the operation continuation period matches the stored period of time. | 12-29-2011 |
| 20120056610 | SWITCHING REGULATOR - A switching regulator: first switching element and second switching element; a logic unit which outputs to the load the output voltage converted from the input voltage to the constant voltage, by causing the first switching element and the second switching element to perform a switching operation; an error amplifier which outputs first signal indicating an error between the output voltage and the first reference voltage; first comparator which inputs the first signal and second signal indicating an output voltage that is proportional to load current flowing in the load, and outputs to the logic unit control signal causing the logic unit to perform the switching operation based on the first signal and the second signal; and a correction unit which is connected to an input side of the error amplifier, and corrects an input voltage of the error amplifier to reduce the input voltage to a certain value or lower. | 03-08-2012 |
| 20120074924 | SYSTEM AND METHOD FOR OPEN LOOP MODULATION TO DETECT NARROW PWM PULSE - An open loop modulation network for a voltage regulator including a latch network, an output sense network, a timing network, and pulse control logic. The latch network latches assertion of a pulse control signal and provides a corresponding latched control pulse indication. The output sense network detects initiation of an output pulse and provides a corresponding output pulse indication. The timing network initiates a delay period in response to the output pulse indication and resets the latched control pulse indication after expiration of the delay period. The pulse control logic terminates the output pulse after the latched control pulse indication is reset and the pulse control signal is negated, whichever occurs last. Very narrow input pulses are detected and either a minimum output pulse is generated or the output pulse is based on the pulse control signal. | 03-29-2012 |
| 20120105047 | PROGRAMMABLE LOW DROPOUT LINEAR REGULATOR - The present invention provides a programmable low dropout linear regulator using a reference voltage to convert an input voltage into a regulated voltage according to a control signal. The programmable low dropout linear regulator includes an operational amplifier having a negative input coupled to receive the reference voltage, a first transistor having a gate coupled to an output terminal of the operational amplifier and a first source/drain coupled to an output terminal of the regulated voltage, a first impedance coupled between a positive input of the operational amplifier and the output terminal of the regulated voltage, and a second impedance coupled between the positive input of the operational amplifier and a ground. The second impedance includes a second transistor having a gate coupled to receive the control signal. | 05-03-2012 |
| 20120146615 | OUTPUT VOLTAGE ADJUSTMENT CIRCUIT FOR BUCK CIRCUITS - An output voltage adjustment circuit for buck circuits includes a microcontroller, first to eighth keys, and a display unit. The first to eighth keys input voltage adjustment signals to the microcontroller. A first input pin of the microcontroller is connected to a voltage output terminal. A second resistor is connected between the first input pin of the microcontroller and ground. A first to a sixth input/output pin of the microcontroller are connected to the display unit. A first to an eighth output pin of the microcontroller are connected to a pulse width modulation (PWM) controller. The first to eighth keys are selectively activated to provide voltage adjustment signals to the microcontroller, sampling output voltages of the voltage output terminal, comparing with a predetermined voltage, controlling the PWM controller to fine tune the duty cycle to output a stable voltage from the voltage output terminal. The display unit displays the voltages on the voltage output terminal. | 06-14-2012 |
| 20120146616 | DISCHARGER AND DISCHARGER CONTROL METHOD - Upon detecting an external signal which instructs to stop discharge, an input voltage equal to or less than a set value for the prevention of overdischarge, or an output voltage equal to or more than a set value for the prevention of output of an overvoltage, a control unit ( | 06-14-2012 |
| 20120206125 | METHOD OF FORMING A SEMICONDUCTOR DEVICE AND STRUCTURE THEREOF - A power conversion circuit and method of formation is provided, which in one embodiment includes a transistor, a driver circuit having an output connected to a control electrode of the transistor and having a bootstrap port configured to be connected to a first terminal of a capacitor; a switch circuit having a first port connected to a current carrying electrode of the transistor and having a ground port connected to a ground, a capacitor port configured to be connected to a second of the capacitor, a first switch configuration in which the capacitor port is connected to the first port, and a second switch configuration in which the capacitor port is connected to the ground port. | 08-16-2012 |
| 20130015836 | LOW NOISE STEP-DOWN CONVERTER AND LOW NOISE VOLTAGE SUPPLY ASSEMBLYAANM Chang; Chiu-HsienAACI New Taipei CityAACO TWAAGP Chang; Chiu-Hsien New Taipei City TWAANM Wu; Ming-FengAACI New Taipei CityAACO TWAAGP Wu; Ming-Feng New Taipei City TWAANM Cheng; Nai-ShuoAACI New Taipei CityAACO TWAAGP Cheng; Nai-Shuo New Taipei City TWAANM Chen; Yen-TingAACI New Taipei CityAACO TWAAGP Chen; Yen-Ting New Taipei City TW - A low noise step-down converter includes a rectified voltage output, a pulse generator, a rectifying diode, a rectifying inductor, a rectifying capacitor, and an impedance element. The rectified voltage output is provided for outputting a converted voltage. The pulse generator includes a pulse wave output. The pulse generator receives an input voltage and outputs a pulse wave through the pulse wave output. The rectifying diode is reversely coupled to the pulse wave output. One end of the rectifying inductor is connected to the pulse wave output for receiving the pulse wave while the other is connected to the rectified voltage output. One end of the rectifying capacitor is connected to the rectified voltage output, and the other end is electrically grounded. The impedance element at least provides resistance impedance and inductance impedance, wherein the rectifying diode and the impedance element are connected in series and are electrically grounded. | 01-17-2013 |
| 20130069618 | MOMENTARILY ENABLED ELECTRONIC DEVICE - A method and apparatus for providing intermittent or interruptible power to an electronic device. The circuit may provide power upon user initiation and interrupt that power in response to a user command, fault state, period of inactivity and so forth. As one example, interruptible power may be initially provided to activate or “power up” an electronic device and constant power provided after the initial activation. The initial powering up of the device may be facilitated by closing two contacts. The circuit may continue to provide power after the button is released through a monitoring and/or feedback mechanism. | 03-21-2013 |
| 20130076334 | SELECTABLE PHASE POWER SUPPLY SYSTEM - A power supply system to provide power for a central processing unit (CPU) includes a bridge circuit, a pulse width modulation (PWM) controller and a pulse adjusting driver circuit. The bridge circuit detects a work state of the PWM controller to obtain a feedback signal output from the PWM controller, and provides the feedback signal to the CPU. The CPU outputs a control signal to the bridge circuit according to a work state of the CPU and the feedback signal, and the bridge circuit outputs a PWM signal to the pulse adjusting driver circuit according to the control signal. The pulse adjusting driver circuit receives a first driving signal provided by an external circuit, and adjusts the first driving signal according to the PWM signal to generate at least one second driving signal to drive the CPU. | 03-28-2013 |
| 20130147459 | METHOD FOR CORRECTING CURRENT OF PWM CONVERTER - The present invention relates to a method for compensating a current of a DC/DC converter that detects an average value of a pulsatory current that is output as a chopping wave form from an inductor that is used in a DC/DC converter to compensate an offset value in real time. A method for compensating a current of a DC/DC converter can include analyzing a PWM signal for a switching DC-DC converter, if the PWM signal is on, comparing a delay time with a rise half cycle size between a detected current and a real current that is output by an inductor, calculating a current variation amount and determining an offset compensation value for compensating a current variation amount according to the comparison result of the rise half cycle size and the delay time, and applying the offset compensation value to compensate the detected current of the inductor. | 06-13-2013 |
| 20130169262 | Methodology for Controlling A Switching Regulator Based on Hardware Performance Monitoring - A methodology for regulating power supplied to a powered component based on hardware performance, such as may be used in a system that includes the powered component and a switching regulator (EMU or energy management unit) configured to supply a regulated supply voltage to the powered component. Performance monitoring circuitry generates a performance monitoring signal corresponding to a detected performance level of selected digital operations of the powered component relative to a reference performance level. Switching control circuitry provides a switching control signal in response to the performance monitoring signal. In an example embodiments, the switching control circuitry for the switching regulator (switching transistor) is integrated into the powered component, and the detected performance level corresponds to a detected signal path delay associated with the digital operations of the powered component. | 07-04-2013 |
| 20130314070 | DC-DC CONVERTER - A DC-DC converter includes a main reactor interposed in a main energization path extending from a DC voltage input terminal to a DC voltage output terminal, a first main switching element interposed into the main energization path so as to be on-off controlled so that current flowing across the main reactor is intermitted, a second main switching element forming a discharge loop discharging electrical energy stored in the main reactor to the DC voltage output terminal side, an auxiliary reactor interposed between the first main switching element and the main reactor in the main energization path, an auxiliary switching element discharging electrical energy via the main reactor to the DC voltage output terminal side, the electrical energy being stored in the auxiliary and main reactors, and diodes connected in reverse parallel with the first and second main switching elements and the auxiliary switching elements respectively. | 11-28-2013 |
| 20140002053 | Power supply modulation method and power supply modulator | 01-02-2014 |
| 20140132243 | TWO-WIRE TRANSMITTER STARTER CIRCUIT AND TWO-WIRE TRANSMITTER INCLUDING THE SAME - A two-wire transmitter starter circuit is configured to stably supply power at the time of start-up. The two-wire transmitter starter circuit includes a starter current generation circuit. The starter current generation circuit is connected in parallel with a current conversion unit configured to convert a detection signal of a sensor to a predetermined DC current. The starter current generation circuit includes a first series circuit where a first resistor and a shunt regulator are connected in series, and a second series circuit where a switching element and a second resistor are connected in series. The shunt regulator includes a first control terminal connected to a connection point of the switching element and the second resistor. The switching element includes a second control terminal connected to a connection point of the first resistor and the shunt regulator. | 05-15-2014 |
| 20140184191 | SYSTEM AND DEVICE FOR REDUCING STANDBY POWER CONSUMPTION - The invention provides a system and a device for reducing standby power consumption. The system for reducing standby power consumption, comprises a power regulator, a power detecting circuit and a HIC module, and the HIC module is controlled by a MCU to efficiently reduce standby power consumption. | 07-03-2014 |
| 20140253090 | CONFIGURABLE INTEGRATED CIRCUIT ENABLING MULTIPLE SWITCHED MODE OR LINEAR MODE POWER CONTROL TOPOLOGIES - An integrated circuit is operable for implementing any of multiple switched mode or linear power control topologies. The integrated circuit includes a control unit, and functional blocks each of which includes circuitry. The control unit is operable selectively to enable particular ones of the functional blocks in response to an input signal indicative of a particular one of the switched mode or linear mode power control topologies. | 09-11-2014 |
| 20140266143 | VOLTAGE REGULATOR - A method includes receiving, at a voltage regulator, an activity adjustment signal from a digital circuit. The method also includes controlling one or more variable impedance elements of the voltage regulator to modify an output voltage provided to the digital circuit. The output voltage is based at least in part on the activity adjustment signal. | 09-18-2014 |
| 20150028843 | METHOD FOR REMOTE CONTROL OF A POWER CONVERTER MODULE AND A DEVICE - The present disclosure relates to methods, systems and a module for operating a power converter module, the power converter module comprises a voltage source, a remote control terminal configured to be connected to a voltage potential for remote control of the power converter module. A voltage converter is configured to send an alarm signal, determine the voltage potential of the remote control terminal, and control an output voltage of the voltage converter at an output terminal of the power converter module based on the determined voltage potential of the remote control terminal. An alarm branch is configured to change the voltage potential of the remote control terminal by a voltage source in response to an alarm signal from the voltage converter when the remote control terminal is connected to a voltage potential, thereby causing the voltage converter to control the output voltage at the output terminal. | 01-29-2015 |
| 20150035514 | DC-DC CONVERTER AND SEMICONDUCTOR DEVICE - A DC-DC converter with low power consumption and high power conversion efficiency is provided. The DC-DC converter includes a first transistor and a control circuit. The control circuit includes an operational amplifier generating a signal that controls switching of the first transistor, a bias circuit generating a bias potential supplied to the operational amplifier, and a holding circuit holding the bias potential. The holding circuit includes a second transistor and a capacitor to which the bias potential is supplied. The first transistor and the second transistor include a first oxide semiconductor film and a second oxide semiconductor film, respectively. The first oxide semiconductor film and the second oxide semiconductor film each contain In, M (M is Ga, Y, Zr, La, Ce, or Nd), and Zn. The atomic ratio of In to M in the first oxide semiconductor film is higher than that in the second oxide semiconductor film. | 02-05-2015 |
| 20150115931 | POWER SUPPLY DEVICE, POWER SUPPLY SYSTEM AND METHOD FOR CONTROLLING THE SAME - A power supply system may include a target device and an adapter. The target device may include an adapter connection switch that receives adapter recognition information to form a connection with the adapter, a voltage detection unit that receives an output voltage from an adapter, and a voltage-change-requesting unit that outputs a voltage to request a voltage change based on information on the output voltage from the adapter. The adapter may include a device information recognition unit that receives the voltage to request a voltage change, and an output-voltage-changing unit that changes the output voltage based on the voltage to request a voltage change. | 04-30-2015 |
| 20160103465 | METHOD TO IMPROVE THE RESOLUTION OF AN SCR BASED POWER SUPPLY - A method to provide high resolution power control in SCR based power supplies utilizing dithering designed to introduce perturbations in the control signal to the power supply controller or firing circuit+, and to thereby control the output of the power supply with increased resolution. | 04-14-2016 |
