Entries |
Document | Title | Date |
20080203992 | Adaptive controller with mode tracking and parametric estimation for digital power converters - A controller for a power stage may adaptively control power switches to improve the efficiency of power consumption by the power stage and detect continuous conduction mode (“CCM”) and discontinuous conduction mode (“DCM”) operations of the power stage without instantaneous or cycle by cycle sensing and sampling of the output inductor current. Additionally, the controller may be used to facilitate the estimation of output inductor value, the peak inductor current value, and other information on converter operations. | 08-28-2008 |
20080238398 | Automatic current trimming method and circuits - Techniques pertaining to device and method for controlling an analog signal are disclosed. Using a single connection (e.g., a connector or a pin) without an external resistive element (e.g., a resistor), an analog output is digitally controlled and produced. According to one aspect of the present invention, a precisely controlled current is generated from a coded data that represents. A control unit is designed to control a working mode based on an input signal from the connection. In one embodiment, the working mode includes a default mode, a programmable mode, a testing mode and a shutdown mode. Under the programmable mode, a user determines a signal coupled in from the connection as desired, and a code unit codes the signal in accordance with a predefined protocol. The code unit then sends the coded data to a decode unit. The decode unit is designed to generate or control the current by the decoded data | 10-02-2008 |
20080278136 | Power supplies for RF power amplifier - Switched-mode power supplies (SMPSs) and their control methods for radio frequency (RF) power amplifiers in battery-powered wireless transmitter devices involve a Boost-type SMPS and a Buck-type SMPS in cascade connection which are controlled so that high efficiency is maintained for various loads and transmission power levels. The Boost SMPS and the Buck SMPS can be controlled based on the mode of operation of the transmitter, such as the actual battery voltage, the needed output power, the selected frequency band, the selected RF power amplifier (PA), the selected modulation method of the transmission signal, and/or the selected PA voltage control method, such as the envelope elimination and restoration (EER) technique, the envelope tracking (ET) technique, or the power-level tracking (PT) technique. | 11-13-2008 |
20080309304 | ELECTRO-OPTICAL DEVICE AND ELECTRONIC APPARATUS - The electro-optical device is directly connected to a battery and includes a display panel, a driver, and a voltage adjusting circuit. The driver amplifies an input voltage and supplies the amplified voltage to the display panel. The voltage adjusting circuit includes a plurality of conversion circuits, a switching unit, and a control circuit. The plurality of conversion circuits convert a voltage input from the battery into different voltages and supply the converted voltages to the driver. The switching unit performs switching for supplying the voltage to one of the plurality of conversion circuits. The control circuit controls the switching unit to switch the conversion circuit that supplies the voltage input from the battery when it is detected that a voltage gain of the driver has changed. Thus, the power consumption can be reduced without having an adverse effect on image display. | 12-18-2008 |
20090009149 | SYSTEM AND METHOD FOR LIMITING INPUT VOLTAGE TO A POWER DELIVERY SYSTEM HAVING REGENERATION CAPABILITY - A system and method for limiting input voltage to a power delivery system having regeneration capability. According to various embodiments, the system includes a regulator having a multiple input variables and at least one output variable; and an accumulator in communication with the regulator wherein the accumulator presets the output of the regulator to facilitate a quick output as well as accumulates error values related to the multiple input variables and facilitates a change by the regulator to the at least one output variable based upon the accumulated values. | 01-08-2009 |
20090033308 | COMPONENT RELIABILITY BUDGETING SYSTEM - A system may include acquisition of a supply voltage information representing past supply voltages supplied to an electrical component, acquisition of a temperature information representing past temperatures of the electrical component, and control of a performance characteristic of the electrical component based on the supply voltage information and the temperature information. Some embodiments may further include determination of a reliability margin based on the supply voltage information, the temperature information, and on a reliability specification of the electrical component, and change of the performance characteristic based on the reliability margin. | 02-05-2009 |
20090039858 | DIRECT CURRENT POWER SUPPLY DEVICE - A direct-current power supply apparatus outputs a predetermined output voltage by lowering an input voltage. The apparatus includes a control element to which the input voltage is inputted, a first resistive element, provided in series with the control element, which outputs the output voltage, and second and third resistive elements, connected in series with each other, which are provided in parallel with the first resistive element. A voltage at a midpoint between the second resistive element and the third resistive element is fed back so as to control the control element. | 02-12-2009 |
20090039859 | INTEGRATED CIRCUIT AND ELECTRONIC APPARATUS - An integrated circuit includes a trigger signal generating unit configured to generate a trigger signal for setting a control unit connected thereto in a reset state, an input unit configured to input a DC voltage of a predetermined voltage value, a pulse signal generating unit configured to generate and output a pulse signal with the predetermined voltage value to a power supply unit configured to generate a voltage to be supplied to the control unit with a coil and a capacitor, a detecting unit configured to detect generation of an event which requires an output of the trigger signal, a stopping unit configured to stop outputting of the pulse signal based on a detection result from the detecting unit, and an output unit configured to output the trigger signal generated by the trigger signal generating unit after outputting of the pulse signal is stopped and a predetermined condition is satisfied. | 02-12-2009 |
20090066310 | INTERNAL VOLTAGE GENERATION CIRCUIT WITH CONTROLLED ENABLE PULSE WIDTH - The internal voltage generation circuit includes an internal voltage enable signal generation unit generating an internal voltage enable signal whose enable pulse width is controlled according to an external voltage. An internal voltage generation unit generates an internal voltage corresponding to a reference voltage according to the internal voltage enable signal. The internal voltage generation circuit generates an internal voltage according to an internal voltage enable signal whose enable pulse width is controlled in response to an external voltage, and thus current consumption is improved, and the internal voltage generation circuit provides a stable internal voltage. | 03-12-2009 |
20090079412 | Apparatus and method for controlling the output of a photovoltaic array - An array of photosensitive devices, including photovoltaic cells is controlled to provide adequate output voltage for continued use when light conditions are sensed as dropping below a predetermined level for normal operations. Control is made of the internal connections between banks of devices or cells by switching normally parallel connected banks of series connected devices or cells to series connected banks. Stepped switching of an increased number of banks can be made as the light continues to drop, in order to extend and maximize the output of the array during reduced light conditions. The output can be further controlled to limit application of the output voltage to a load during times of diminished light conditions in order to not overdraw the diminished current capacity characteristics when the series connections are made. | 03-26-2009 |
20090091310 | Apparatus and Methods for Powering Remote Devices Under Dynamic Source and Load Conditions - Power provided to a remote network component is regulated. A monitoring circuit estimates a DC input voltage that is received from a central network supply. A control circuit compares the DC input voltage to a threshold DC voltage value to determine if the DC input voltage exceeds the threshold DC voltage value. A voltage conversion circuit converts the DC input voltage to a DC output voltage that is provided at an output voltage conductor and that is less than the threshold DC voltage value, if the DC input voltage exceeds the threshold DC voltage value. A bypass circuit bypass the voltage conversion circuit and transmit the DC input voltage to the output voltage conductor as the DC output voltage if the DC input voltage is less than the threshold DC voltage value. | 04-09-2009 |
20090096437 | AUTOMATIC POWER SUPPLY CONVERTING CIRCUIT - An automatic power supply converting circuit includes a live input terminal, a neutral input terminal, a relay, a regulator, a voltage divider circuit, an identifying circuit, a switch circuit and a voltage doubling circuit. The live input terminal and the neutral input terminal are configured for receiving a first alternating current (AC) voltage. The regulator is configured for filtering and steadying the first AC voltage and outputting a regulated voltage. The voltage divider circuit is configured for sampling the first AC voltage and outputting a divided voltage. The identifying circuit is configured for comparing a divided voltage with a reference voltage, and outputting a control signal. The switch circuit is configured for controlling the relay to be conductive or not. The voltage doubling circuit is capable of being controlled by the relay and outputting a doubled voltage. | 04-16-2009 |
20090108827 | UNDER VOLTAGE LOCK OUT CIRCUIT AND METHOD - An under voltage lock out circuit which monitors an input voltage and executes a predetermined sequence when the input voltage satisfies a predetermined condition may include a voltage comparison unit which compares the input voltage and a predetermined threshold voltage, and outputs a comparison signal; a logic circuit which receives the comparison signal output from the voltage comparison unit and a start-up signal instructing start-up of an equipment mounted with the under voltage lock out circuit, and asserts a sequence control signal when start-up is instructed by the start-up signal in a state the input voltage is higher than the threshold voltage; and a sequence circuit which executes a predetermined sequence when the sequence control signal is asserted, wherein the predetermined threshold voltage is switched according to the sequence control signal. | 04-30-2009 |
20090128117 | Voltage Conversion Device - A voltage transformer, which is placed between a DC power source (B) and a motor (M | 05-21-2009 |
20090134861 | POWER SUPPLY CIRCUIT AND ELECTRONIC APPARATUS - A power supply circuit includes: an input terminal; a DC voltage converter that converts a DC input voltage supplied to the input terminal into a DC output voltage; an output terminal that outputs the DC output voltage; a bypass circuit provided to the DC voltage converter between the input terminal and the output terminal; and a monitor control unit that monitors whether or not the DC input voltage satisfies a predetermined condition to be processed in the DC voltage converter, so as to connect the input terminal to the output terminal via the bypass circuit if the DC input voltage does not satisfy the predetermined condition. | 05-28-2009 |
20090140713 | REGULATOR CIRCUIT FOR TESTING INHERENT PERFORMANCE OF AN INTEGRATED CIRCUIT - In testing the function of an integrated circuit which includes a power voltage regulator for smoothing a power voltage received on an input terminal so as to reach an adjustment target voltage level, and a voltage adjuster for adjusting the voltage level, the voltage adjuster being interconnected to a wiring which is to supply the power voltage of the adjustment target voltage level thus adjusted to internal logics produced by designing in advance for accomplishing a target function, the voltage adjuster is controlled to execute a function test with plural voltage levels, and, based on a result from the function test, the optimal voltage level is selected which is to be supplied to the internal logics. The inherent performance of the regulator circuit is measured without being affected by the parasitic resistances. | 06-04-2009 |
20090167277 | Common-Mode Voltage Generator for a Battery-Supplied Handset Apparatus - A common-mode voltage generator for a battery-supplied apparatus is provided with a battery voltage ripple-insensitive sensor comprising a voltage dividing circuit and a number of hysteresis comparators, by means of which a battery voltage, or a fraction thereof is compared with a series of reference voltages. These reference voltages are derived from an on-chip voltage by means of said voltage dividing circuit. The hysteresis of said hysteresis comparators is larger than the ripple on said battery voltage. Further there is an adjustable regulation loop. The sensor detects a battery voltage range and adjusts the regulation loop on the basis of this range. The regulation loop provides an output commonmode voltage, which is equal to a fraction, preferably half the battery voltage. | 07-02-2009 |
20090167278 | Power Supply with Separate Line Regulation and Load Regulation - A system to supply power to an electronic system, comprises a set of one or more power units each configured to transform an input voltage into an output voltage; and a line regulator coupled to a power unit and configured to modulate a duty cycle of the power unit and a load regulator configured to provide a second control signal to a power unit to selectively enable the power unit based on load information provided by the electronic system. | 07-02-2009 |
20090179626 | Characterization Of AC Mains Circuit Parameters - Methods, devices, and systems implementing AC mains circuit parameter characterization are provided. One example embodiment of an image forming device includes a variable electrical load, and a controller adapted to vary the electrical load based on a characterization of AC mains circuit parameters including source voltage and line impedance wherein line impedance is determined for a change in source voltage. | 07-16-2009 |
20090189588 | Power supply circuit having resistance element changing its resistance value to limit current flowing to capacitive load - A power supply circuit includes a control circuit which outputs a control signal when an in-rush current flows and a power-supply-resistance control circuit which supplies a current to a capacitive load. The power-supply-resistance control circuit, provided in the current path between a power supply and the capacitive load, increases the resistance of the current path in response to the control signal and reduces the resistance of the current path in response to a stop page of the control signal, whereby the control signal is output or stopped so that the in-rush current is suppressed to a value smaller than or equal to a given value. | 07-30-2009 |
20090195234 | ON-CHIP VOLTAGE SUPPLY SCHEME WITH AUTOMATIC TRANSITION INTO LOW-POWER MODE OF MSP430 - An integrated electronic device includes circuitry for providing a system supply voltage from a primary power supply. The circuitry has a high power (HP) stage coupled to the primary power supply and having an output node coupled to a supply system node for providing a HP system supply voltage level and a HP output current such that the HP stage is configured to be active in a full power mode, and a low power (LP) stage coupled to the primary power supply and to the supply system node through a voltage follower for providing a LP supply voltage level and an LP output current such that the LP stage is configured to be active in a low power mode. The HP system supply voltage level is greater than the LP system supply voltage level and the voltage follower of the LP stage is adapted to switch off in response to a voltage level at the supply system node becoming greater than the HP system supply voltage level and to switch on in response to the voltage level at the supply system node becoming lower than the HP system supply voltage level. | 08-06-2009 |
20090219005 | Load Control Device Having a Trigger Circuit Characterized by a Variable Voltage Threshold - A two-wire load control device, such as a dimmer, is operable to control the amount of power delivered to an electrical load, such as a magnetic low-voltage (MLV) load, and comprises a bidirectional semiconductor switch, a timing circuit, a trigger circuit having a variable voltage threshold, and a clamp circuit. When a timing voltage signal of the timing circuit exceeds an initial magnitude of the variable voltage threshold, the trigger circuit is operable to render the semiconductor switch conductive, reduce the timing voltage signal to a predetermined magnitude less than the initial magnitude, and to increase the variable voltage threshold to a second magnitude greater than the first magnitude. The clamp circuit limits the magnitude of the timing voltage signal to a clamp magnitude between the initial magnitude and the second magnitude, thereby preventing the timing voltage signal from exceeding the second magnitude. Accordingly, multiple attempted firings of the semiconductor switch are avoided, and the MLV dimmer is prevented from conducting asymmetric current when an MLV transformer of the MLV load is unloaded. | 09-03-2009 |
20090256545 | Current-level Controlling Device for a Power Supply Device and Related Power Supply Device - A current-level controlling device for a power supply includes a reception end for receiving a current sense signal, a reference voltage generator for generating a reference voltage, an adaptive reference voltage generator, coupled to the reference voltage generator and the reception end, for adjusting the reference voltage according to variation of peak values of the current sense signal, so as to generate an adaptive reference voltage, a comparator, coupled to the reception end and the adaptive reference voltage generator, for comparing the current sense signal and the adaptive reference voltage, to generate a comparison result, and a control unit, coupled to the comparator, for controlling a switch transistor of the power supply according to the comparison result. | 10-15-2009 |
20090267584 | TRANSIENT DETECTION CIRCUIT - A transient detection circuit coupled between a first power line and a second power line and including a first control unit, a setting unit, and a voltage regulation unit. The first control unit generates a first control signal. The first control signal is at a first level when an electrostatic discharge (ESD) event occurs. The first control signal is at a second level when the ESD event does not occur. The setting unit sets a first node. The first node is set at the second level when the first control signal is at the first level. The voltage regulation unit regulates the first node. The voltage regulation unit regulates the level of the first node at the second level when the first control signal is at the second level. | 10-29-2009 |
20090278522 | LOW POWER METHOD OF RESPONSIVELY INITIATING FAST RESPONSE TO A DETECTED CHANGE OF CONDITION - A voltage signal is monitored in comparison to another voltage signal by a differential amplifier. When the first voltage signal value drops below the second voltage signal value an output signal is boosted in response. The output signal returns to a previous state without boost. | 11-12-2009 |
20090289613 | DRIVING CIRCUITRY AND AN INTEGRATED CIRCUIT FOR USE THEREIN - Driving circuitry having driving means for driving a load using a first DC voltage, regulator means for receiving an input voltage and deriving a regulated output voltage from the input voltage, and power source switch means switchable between a first state in which the first DC voltage is supplied to the regulator means as the input voltage and a second state in which a second DC voltage, lower than the first DC voltage and higher than the regulated output voltage, is supplied to the regulator means as the input voltage, second voltage deriving means for deriving the second DC voltage from the first DC voltage, and switch control means connected to the power source switch means for causing the power source switch means to switch from the first state to the second state when the second DC voltage is suitable for supply to the regulator means as the input voltage. | 11-26-2009 |
20100007321 | Dynamic electrical converter system - A dynamic electrical converter system configured to receive a variable voltage input which is then converted to a proper electrical configuration for a load. The converter assembly utilized multiple converters, each of which is configured to accept a unique range of voltages and from these voltages creating the desired electrical output configuration. A monitor checks the incoming voltage and by controlling switches going to each of the converters, selectively closes the circuit to the appropriate converter; thereby, routing the incoming voltage to the converter capable of addressing the incoming voltage. | 01-14-2010 |
20100026270 | AVERAGE INPUT CURRENT LIMIT METHOD AND APPARATUS THEREOF - The embodiment of invention discloses an average input current limit method and apparatus thereof. The apparatus comprises a switching circuit, a current average circuit and a current limit circuit. The current average circuit samples the input current of the switching circuit and generates a signal representative of the average value of the input current. The current limit circuit limits the signal so as to limit the average value of the input current. | 02-04-2010 |
20100039089 | REGULATION CIRCUIT AND A METHOD FOR REGULATING AN INPUT VOLTAGE - A regulation circuit comprises an error detector, an integrator, and a voltage regulator. The error detector comprises an input for an input voltage, a further input for a reference voltage and an output for an error signal, wherein the error signal depends on the input voltage and the reference voltage. The integrator comprises an input for the error signal and an output for an integrated error signal. The voltage regulator comprises an input for the input voltage and a terminal for the integrated error signal, wherein the voltage regulator is configured to adjust a shunt current responsive to the integrated error signal such that the input voltage is adjusted towards the target voltage. | 02-18-2010 |
20100060254 | DC-DC converter - A synchronous-rectifier type DC-DC converter includes a high-side main switch element, a low-side rectifying switch element, and a control drive circuit. The rectifying switch element includes a rectifying transistor element and a rectifying diode element connected in antiparallel with the rectifying transistor element. The control drive circuit detects an input voltage to the main switch element and determines the input voltage or a rate of increase in the input voltage. When the determined value exceeds a predetermined reference value, a complementary ON/OFF operation of the main switch element and the rectifying transistor element is released, and a state where both the main switch element and the rectifying transistor element are kept OFF for a time period that is longer than a dead-time during the complementary ON/OFF operation is set. | 03-11-2010 |
20100066339 | SEMICONDUCTOR DEVICE AND SYSTEM - A semiconductor device is provides which includes: a first boost circuit that generates a first boost voltage by boosting an external voltage and supplies the first boost voltage to an internal circuit; and a first circuit that supplies the external voltage to an output of the first boost circuit when power is turned on and supplies the first boost voltage to the output of the first boost circuit when the external voltage reaches a given voltage. | 03-18-2010 |
20100072971 | CIRCUIT FOR A SEMICONDUCTOR SWITCHING ELEMENT INCLUDING A TRANSFORMER - A circuit for a semiconductor switching element including a transformer. One embodiment provides a first voltage supply circuit having a first oscillator. A first transformer is connected downstream of the first oscillator. A first accumulation circuit for providing a first supply voltage is connected downstream of the first transformer. A driver circuit having input terminals for feeding in the first supply voltage and having output terminals for providing a drive voltage for the semiconductor switching element, designed to generate the drive voltage for the semiconductor switching element at least from the first supply voltage. | 03-25-2010 |
20100085029 | ADVANCED SLOPE INJECTION FOR INPUT CURRENT LIMITING OF SWITCH-MODE DC/DC CONVERTER - A DC/DC converter comprising voltage conversion circuitry for generating a regulated output voltage responsive to an input current and at least one switching control signal. A current control loop generates the at least one switching control signal to limit an input current responsive to the input current, a reference voltage and a slope signal injected with the reference voltage. | 04-08-2010 |
20100123448 | CONTROLLED ON-TIME BUCK PFC - An apparatus for generating an output voltage from an input voltage is provided. The apparatus comprises a switch that receives the input voltage, an inductor that is coupled to the switch, a capacitor coupled to the inductor with the output voltage being output from a node between the inductor and the capacitor, a measuring circuit that receives and measures the input voltage, and a controller that is coupled to the switch and to the measuring circuit. Additionally, the controller receives the measured input voltage and calculates an on-time for the switch based on the measured input voltage and actuates the switch for the on-time. | 05-20-2010 |
20100171482 | METHOD AND APPARATUS OF A MAXIMUM POWER POINT TRACKING CIRCUIT FOR SOLAR POWER GENERATION - A circuit that tracks the maximum power point of the solar cell is disclosed in the present invention. Unlikely conventional way of maximum power point tracking (maximum power point is referred to as MPP hereinafter; maximum power point tracking is referred to as MPPT hereinafter) which tracks MPP in the time frame of second or minutes, in the disclosed invention, MPP is tracked within the switching cycle, using the natural current ripple of the downstream converter circuit. The switching cycle is in the order of 10s of micro-seconds. Within the switching cycle of the converter, there is a natural current ripple which will result in the power change. The MPPT circuit tracks the power change and adjusts the current reference value accordingly to operate at MPP of the solar cell. | 07-08-2010 |
20100188064 | INSTRUMENT POWER CONTROLLER AND METHOD FOR ADAPTIVELY PROVIDING AN OUTPUT VOLTAGE AND AN OUTPUT CURRENT THAT TOGETHER MAINTAIN A SUBSTANTIALLY CONSTANT ELECTRICAL OUTPUT POWER - An instrument power controller ( | 07-29-2010 |
20100188065 | OPERATION CONTROL METHOD OF CHARGE PUMP CIRCUIT - A disclosed operation control method of a charge pump circuit for boosting an input voltage to a desired magnitude in the range between the input voltage and twice the input voltage and outputting the boosted voltage. The method includes the steps of (a) during a charging period, charging, with the input voltage, one or more of the capacitors connected in series by selectively turning on one or more of the first switches in accordance with the desired voltage magnitude, turning on the third switch, and selectively turning on the second switch or one of the fourth switches; and (b) during a discharging period, turning off the third switch and the second switch or the fourth switch having been turned on; selectively turning on one or more of the first switches; and turning on one or more fourth and the fifth switches. | 07-29-2010 |
20100225294 | INRUSH CURRENT CONTROL SYSTEM WITH SOFT START CIRCUIT AND METHOD - A method of and system for controlling the inrush current generated in a MOSFET of an inrush current control system, wherein the MOSFET includes a source, gate and drain. The dV/dt at the drain of the MOSFET is controlled so as to set the inrush current level as a function of dV/dt, independent of current limit without requiring a separate capacitor connected between the gate and drain of the MOSFET so that the MOSFET can turn on and off more quickly. | 09-09-2010 |
20100231191 | Method and apparatus for simulating a potentiometer - Method and apparatus are disclosed for electronic simulation of a potentiometer, and for providing a potentiometric output voltage that is representative of a parameter. The invention also teaches a non-contact type of sensor apparatus producing an output voltage that is indicative of a value of a sensed physical parameter. Electrical characteristics of a potentiometer are simulated by implementing a novel combination of analog and digital circuit techniques. Some of these characteristics include low input current, wide power supply voltage range, and an output voltage range that includes the power supply voltages. The present invention also teaches a sensor comprising electronically simulated potentiometer circuitry and a non-contact sensing element. | 09-16-2010 |
20100237845 | Charge current reduction for current limited switched power supply - Circuits and methods for a switched power converter providing charge power for at least one battery and at the same time delivering current to operate an electronic device, wherein the converter is enabled to operate out of current limit mode, for the maximum possible range of system load requirements, have been achieved. The input current of the power converter is measured within each cycle-by-cycle, i.e. within each cycle of an external clock reference and the charge current is reduced if the input current exceeds a defined portion, e.g. 80% of the maximum allowable input current. The power converter may only enter current limited operation after the charge current has been already reduced to zero. Operating out of current limit mode ensures a maximum efficiency of the converter, maximize the current deliverable to a given load and minimizes subharmonics in the output current and voltage, thereby minimizing interference with other system component. | 09-23-2010 |
20100244804 | METHOD AND APPARATUS OF LOW CURRENT STARTUP CIRCUIT FOR SWITCHING MODE POWER SUPPLIES - A startup circuit for a switching-mode power supply (SMPS) includes a first voltage detector configured to trigger the switching-mode power supply from a startup mode to a normal operation mode when an input supply voltage exceeds a first threshold voltage, a current consumption in the first voltage detector in the startup mode being determined by a reverse leakage current of a diode. A feedback circuit is coupled to the first voltage detector and being capable of maintaining a positive feedback loop with a current consumption of no more than a microampere. A second voltage detector is coupled to the first voltage detector and the feedback circuit, and is configured to trigger the switching-mode power supply to switch from the normal operation mode to the startup mode when the input supply voltage is below a second threshold voltage. | 09-30-2010 |
20100244805 | POWER SUPPLY VOLTAGE DETECTION CIRCUIT - A power supply voltage detection circuit of the present invention includes a reference signal generation circuit that generates a reference signal according to a power supply voltage, a first transistor having a current flowing between a first terminal and a second terminal, where the current is controlled according to the reference signal, a voltage generation circuit that generates a control voltage according to a potential difference between the power supply voltage and the first terminal of the first transistor, and a second transistor that controls whether or not to output the power supply voltage according to the control voltage. Such circuit configuration enables to accurately detect a low voltage state of the power supply voltage. | 09-30-2010 |
20100259240 | Bridgeless PFC converter - A truly Bridgeless PFC converter is provided which eliminates the four-diode bridge rectifier and operates directly from the AC line to result in high-efficiency, small size and low cost solution for Power Factor Correction applications. | 10-14-2010 |
20100277154 | CASCADE DEVICE WITH A VOLTAGE REGULATING EFFECT - The present invention discloses a cascade device with a voltage regulating effect. The cascade device can be applied to a power supply of a cascade structure and includes a comparing element and a power control element. The comparing element provides for inputting a sampling voltage and a reference voltage, and outputs a control signal to the power control element when the sampling voltage is larger than the reference voltage. Next, the power control element can control an input voltage to be outputted to grounding, according to the control signal. Therefore, a control circuit can be provided with a stable voltage source, without requiring an extra rectifying device. | 11-04-2010 |
20100277155 | DRIVER CIRCUIT - A driver circuit raises an output transistor signal smoothly while suppressing decreases in voltage. A motor driver includes a transistor connected to a buffer of a pre-driver. An external terminal of the motor driver is connected to a regulator to supply first and second transistors with voltage. The gates of the first and second transistors are connected to the drain of the other one of the first and second transistors. The first transistor is connected to a third transistor, which receives an input signal. The second transistor is connected to a fourth transistor, which receives the inverted input signal. The external terminal is connected to the gate of a further transistor. The further transistor has a source connected via a fifth transistor to a buffer, and a drain connected to the regulator. | 11-04-2010 |
20100283445 | INTEGRATED CIRCUIT HAVING LOW POWER MODE VOLTAGE REGULATOR - A voltage regulator includes a node, circuitry, a regulating transistor, a disabling transistor, and a voltage follower stage. The circuitry is coupled to the node for providing a current to the node. The regulating transistor is coupled between the node and a first power supply voltage terminal. The disabling transistor is coupled in parallel with the regulating transistor for selectively disabling the regulating transistor by directly connecting the first power supply voltage terminal to the node. The voltage follower stage is coupled between the first power supply voltage terminal and a second power supply voltage terminal. The voltage follower stage has an output connected to a control electrode of the regulating transistor, and an input connected to the node. | 11-11-2010 |
20100295527 | CIRCUIT ARRANGEMENT AND METHOD FOR POWER REGULATION AND AMPLIFIER ARRANGEMENT - A circuit arrangement and method for power regulation and an amplifier arrangement for power regulation are described. | 11-25-2010 |
20100301827 | Control for regulator fast transient response and low EMI noise - Methods and circuits for power supply arrangement and control are disclosed herein. In one embodiment, a switching regulator can include: (i) a filter network coupled to an output terminal, where an output voltage is generated at the output terminal from an input source; (ii) an active switch to connect the input source to the filter network by periodically operating between on and off states over a switching period, where a duty cycle of the on state relative to the switching period is modulated based on a PWM control signal; (iii) a comparator receiving an output feedback signal, a hysteresis signal, and a reference level, and providing the PWM control signal therefrom; and (iv) a hysteresis programming circuit generating the hysteresis signal, and a ramp control signal, where the hysteresis signal is programmed based on conditions at the input source and the output voltage to achieve a pseudo constant frequency operation. | 12-02-2010 |
20100301828 | POWER MANAGEMENT CIRCUIT AND ELECTRONIC DEVICE - The power management circuit includes a sampling unit, a reference voltage unit, a comparator, and a power managing unit. The sampling unit divides an input voltage from the power supply to generate a sampling voltage. The reference voltage unit receives the input voltage and generates a reference voltage when the input voltage is larger than a predetermined value. The comparator compares the sampling voltage with the reference voltage, generates a first signal when the sampling voltage is larger than the reference voltage, and generates a second signal when the sampling voltage is smaller than the reference voltage. The power managing unit establishes an electrical connection between the power supply and the load according to the first signal, and cuts off the electrical connection between the power supply and the load according to the second signal. A related electronic device is also provided. | 12-02-2010 |
20100315058 | POWER SUPPLY APPARATUS WITH INRUSH CURRENT PREVENTION CIRCUIT - A power supply apparatus with an inrush current prevention circuit is applied to a parallel power bus. The power supply apparatus includes a filter capacitor and a current control unit. The current control unit is electrically connected to the filter capacitor. The current control unit controls a charged current flowing through the filter capacitor to prevent an inrush current generated in the parallel power bus. | 12-16-2010 |
20100315059 | SYSTEM AND METHOD FOR CONTROLLING SYNCHRONOUS SWITCH FOR A SYNCHRONOUS CONVERTER - An apparatus comprises a synchronous converter for providing a regulated output voltage responsive to an input voltage, a control PWM signal to a control switch of the synchronous converter and a synchronous PWM signal to a synchronous switch of the synchronous converter. A first circuit generates the control PWM signal and the synchronous PWM signal responsive to a PWM control signal. The first circuit limits a maximum duty cycle of the synchronous PWM signal to a predetermined level. | 12-16-2010 |
20110006748 | SYSTEM AND METHOD FOR LIMITING INPUT-CURRENT SURGE IN A SWITCHING MODE POWER SUPPLY - A power supply comprises an input voltage detector that detects a drop in input voltage that corresponds to an input voltage loss. A power converter is coupled to the input voltage detector. The power converter, which may be a boost converter or a power factor correction converter, has a switching device that is actuated in accordance with a duty cycle. A duty cycle adjuster is responsive to detection of the drop in the input voltage to adjust the duty cycle of the switching device in order to limit an input current surge through the switching device below a desired level after the input voltage returns. | 01-13-2011 |
20110018518 | BOOST/BUCK CONVERTER AND METHOD FOR CONTROLLING IT - A power supply circuit capable of providing two regulated voltages based on a D.C. input voltage, including a boost converter and a buck-boost converter, the circuit including a single inductive element common to the boost and buck-boost converters. | 01-27-2011 |
20110018519 | POWER SUPPLY WITH NON-ISOLATED DC DC SPLITTING - A power supply with non-isolated DC DC splitting includes n conversion cells that are interlaced. The splitting switch of each cell is placed in a resonant circuit. The resonant circuit makes it possible to obtain a switching to the open state of said switch at zero current and voltage. The ripple at the input and output is minimized and the efficiency improved. In particular, the wiring inductances in the charge transfer loop of each cell no longer have negative effects on the efficiency. The cell may be of boost, buck, buck/boost, Cuk or SEPIC topology. | 01-27-2011 |
20110043182 | AUTOMATIC VOLTAGE REGULATOR - The present invention relates to an automatic voltage regulator, and more specifically, to an automatic voltage regulator capable of precisely controlling the output voltage level by using a toroidal autotransformer. The present invention has precise voltage control to enable the output of the voltage level desired by the user, and precisely carries out a variety of applications of power saving and voltage booster. In particular, the present invention can boost/reduce the input voltage to provide a desired target voltage within an error range of 1 volt or less. The present invention also comprises a simple relay switching circuit and excludes semiconductor switching devices, thereby being capable of operating adaptively in different system environments without an additional modification. | 02-24-2011 |
20110050194 | DRIVER CIRCUIT AND TEST APPARATUS - Provided is a driver circuit that outputs, from an output end, an output signal corresponding to an input signal supplied thereto, comprising an output resistance section that is provided between a constant voltage source and the output end; an output switching section that switches voltage of the output end according to the input signal; and a switching section that switches a resistance value of the output resistance section. The output resistance section includes an output resistance FET having a source/drain connection between the constant voltage source and the output end, and the switching section supplies a control voltage to a gate of the output resistance FET such that the resistance between the source and the drain of the output resistance FET switches to a designated value. | 03-03-2011 |
20110080152 | VOLTAGE REGULATION AND MODULATION CIRCUIT - A voltage regulation and modulation circuit of a contactless device, including an adjustable impedance circuit configured to maintain an amplitude of an input voltage to be less than an amplitude of a reference voltage; a current buffer circuit coupled between the adjustable impedance circuit and a load, and configured to buffer a supply current, which is output from the adjustable impedance circuit, to the load; and a parallel regulator coupled to an output of the current buffer circuit, and configured to maintain a constant supply voltage at the load. | 04-07-2011 |
20110101950 | IMPEDANCE CORRECTION - One embodiment of an impedance stabilizer for use with a switching voltage regulator supplied by a source of an electrical voltage has an impedance and a switch controllable to permit current from a source to flow through the impedance. Control circuitry to operate the switch cyclically with a controlled duty cycle is responsive to variations in the voltage of the source having a frequency lower than a cycle rate of the switch to increase the duty cycle of the switch as the voltage of the source increases. | 05-05-2011 |
20110148383 | POWER MANAGEMENT CONTROL SYSTEM AND METHOD - A power management system includes a sensor to detect current output from a battery, a first comparator to compare the battery current to a first reference value, and a burst controller to perform a first power control operation based on said comparison. The power control operation reduces power consumed by the battery in order to cause the battery current to fall below the first reference value. This may be accomplished by reducing or shutting down power to one or more functions or features of a host system that includes or is coupled to receive power from the battery. The host system may include or correspond to a mobile phone and/or any of a number of other electronic devices. | 06-23-2011 |
20110148384 | CIRCUIT FOR GENERATING BOOSTED VOLTAGE AND METHOD FOR OPERATING THE SAME - A boosted voltage generation circuit may include: a boosting circuit configured to boost an input voltage based on a boosting rate and output a boosted voltage, a boosting rate setting unit configured to receive a feedback on a level of the input voltage and set a boosting rate, and an input voltage level setting unit configured to set the level of the input voltage in response to a target level of the boosted voltage and the boosting rate. | 06-23-2011 |
20110199066 | WIDE INPUT VOLTAGE RANGE POWER FACTOR CORRECTION CIRCUIT - A boost circuit is used for power factor correction (PFC). In a low power application, transition mode control is utilized. However, switching frequency varies with different input voltages, and over a wide input voltage range, the switching frequency can become too high to be practical. To address this issue, a boost circuit is provided whose effective inductance changes as a function of input voltage. By changing the inductance, control is exercised over switching frequency. | 08-18-2011 |
20110215785 | VOLTAGE CONTROL SYSTEM - A voltage control system is configured with a constant voltage circuit, a semiconductor package and a power supply package. A power supply chip of the power supply package is configured to control the constant voltage circuit based on an input voltage supplied to the semiconductor package and an operating voltage of a semiconductor device so that the input voltage decreases as the voltage difference between the input voltage and the operating voltage increases. | 09-08-2011 |
20110221418 | POWER TRACKING DEVICE AND POWER TRACKING METHOD THEREOF - A power tracking device for a power generation apparatus is provided. A multiplier generates a power level signal according to a current signal and a voltage signal both sensed from the output of the power generation apparatus. A sample-and-hold circuit samples the power level signal according to a sampling clock and generates a current level signal, a peak level signal, and a threshold level signal according to an update signal. A compare circuit compares the current, peak and threshold level signals to generate the update signal and a change signal. A converter performs pulse width modulation (PWM) to generate a PWM signal according to a control signal corresponding to the change signal and converts the output of the power generation apparatus to a load according to the PWM signal. | 09-15-2011 |
20110241644 | SEMICONDUCTOR DEVICE AND METHOD OF MANUFACTURING THE SAME AND POWER SUPPLY DEVICE - Technology of reducing leakage current in a planar MOSFET and a hollow gate type planar MOSFET is provided. In a planar MOSFET (and hollow gate type planar MOSFET), regions close to a channel in n-type source regions have a shallow depth (shallow n-type source region), and regions away from the channel have a large depth (deep n-type source region). Protruding portions in a horizontal direction of p-type well regions are positioned further inside than a surface of a substrate. In this manner, a planar MOSFET (and a hollow gate type planar MOSFET) having small leakage current can be achieved, and thus there is an effect in loss reduction in a power source using the planar MOSFET (and the hollow gate type planar MOSFET). | 10-06-2011 |
20110260704 | Provision of an output voltage from a wide range variable and low input voltage - A circuit arrangement for providing an output voltage and/or an output current from an input voltage V | 10-27-2011 |
20110260705 | DC-DC CONVERTER, METHOD FOR CONTROLLING DC-DC CONVERTER, AND ELECTRONIC DEVICE - A DC-DC converter includes a switching element to generate a pulse waveform by repeatedly admitting and cutting off the input voltage, a fluctuation component restraining circuit to restrain a fluctuation component generated in superposition on the pulse waveform and having a shorter cycle than a cycle of the pulse waveform, and a control circuit to operate the fluctuation component restraining circuit when the input voltage is equal to or larger than a reference voltage. | 10-27-2011 |
20110267021 | Switched and Smart Switched Tracking Power Supply - A switched tracking power supply circuit that monitors an input power source and modifies the output based on the characteristics of the input source. | 11-03-2011 |
20110267022 | INTERFACE SYSTEM FOR A COG APPLICATION - A current driving type transmitter using independent current signals, which can independently generate and transmit differential current indicating a logic state of data to be transmitted, using a difference between positive data current and negative data current without using external current, so that magnitudes of current applied to a pair of transmission lines can be kept constant without being influenced by the design of current sources and processing factors, a current driving type receiver using independent current signals, which can simultaneously convert a difference in levels of current, received through the transmission lines, into a voltage level by a single I-V converter, so that errors of a true line and a bar line can be lessened, and an interface system for COG application, which adopts the transmitter and receiver, so that distortion of transmitted signals can be reduced. | 11-03-2011 |
20110273157 | SENSOR-LESS OPERATION AND DETECTION OF CCM AND DCM OPERATION MODES IN SYNCHRONOUS SWITCHING POWER CONVERTERS - Generally, described herein are embodiments of control schemes for sensor-less operation and detection of CCM and DCM in a switching power converter. In one aspect, embodiments of a controller are described that utilize dual control loops and do not require sensing the inductor current or any current in the converter which eliminates or reduces the challenges and problems associated with current sensing. Advantages of embodiments of methods described herein become more significant when used in ultra high switching frequency converters since embodiments of the controller result in eliminating the need for high-speed low-noise current sensing circuitries, when used in on-chip integrated power converters where sensing accuracy may be a more significant issue compared to on-board power converters, and in power converters with paralleled modules since embodiments of the controller eliminate sensing circuitries in each of the modules. | 11-10-2011 |
20110279104 | DC CONVERTER FOR A MOTOR VEHICLE - A step-up converter converts a battery voltage to an intermediate voltage. The intermediate voltage is greater than or equal to the battery voltage. A step-down converter receives the intermediate voltage supplied by the step-up converter and controls an output voltage which is less than or equal to the intermediate voltage. The step-up converter controls the intermediate voltage in an open loop depending on the battery voltage, at least if the battery voltage is lower than a first predetermined value, and at least if at the same time the load on the output of the step-up converter exceeds a minimum load. | 11-17-2011 |
20110285375 | Maximum Power Point Tracker Bypass - A circuit arrangement, includes output terminals that provide an output current and input terminals that receive a source current and a source voltage from a DC current source. A maximum power point tracker is coupled between the input terminals and the output terminals and a bypass circuit is coupled between the input terminals and the output terminals. The bypass circuit is configured to enter a bypass state dependent on the output current and dependent on the source current. The source current flows through the bypass circuit in the bypass state. | 11-24-2011 |
20110285376 | MULTI-HYSTERESIS VOLTAGE CONTROLLED CURRENT SOURCE SYSTEM - A multi-hysteresis voltage controlled current source system having a variety of multi-hysteresis characteristics is provided. In the multi-hysteresis voltage controlled current source system, single-hysteresis voltage controlled current source circuits | 11-24-2011 |
20110291635 | ELECTRONIC CIRCUIT - An electronic circuit including a first electronic sub-circuit having an operating voltage that is higher than a supply voltage provided by a voltage source, and a second electronic sub-circuit that is coupled to the voltage source and to a first voltage input of the first electronic sub-circuit. The second electronic sub-circuit includes a short-time voltage boosting circuit that is adapted to provide a voltage at the first voltage input for a period long enough to enable a start-up of the first electronic sub-circuit when the short-time voltage boosting circuit is triggered and a controllable voltage boosting circuit that is adapted to provide a boosted voltage at the first voltage input. The controllable voltage boosting circuit is coupled to a control output of the first electronic sub-circuit to receive a control signal, and the period the short-time voltage boosting circuit provides a voltage at the first voltage point is long enough to start the control of the controllable voltage boosting circuit by the first electronic sub-circuit. | 12-01-2011 |
20110298440 | LOW VOLTAGE SIGNALING - A low voltage signaling system for integrated circuits includes a first voltage domain operating at a nominal integrated circuit (IC) power supply voltage (Vdd) swing level at a signal transmitting end of a first chip, a second voltage domain having one or more transmission interconnect lines operating at a reduced voltage swing level with respect to the first voltage domain, and a third voltage domain at a signal receiving end of a second chip, the third voltage domain operating at the Vdd swing level; wherein an input signal originating from the first voltage domain is down converted to operate at the reduced voltage swing level for transmission over the second voltage domain, and wherein the third voltage domain senses the input signal transmitted over the second voltage domain and generates an output signal operating back up at the Vdd swing level. | 12-08-2011 |
20110298441 | Converter Circuit and Electronic System Comprising Such a Circuit - A converter circuit to be connected to an electrical energy source capable of showing major fluctuations in delivered power includes a chopper circuit with a variable duty cycle and connectable to the electrical energy source, an output circuit adapted for connection to the chopper circuit, a control loop for tracking an MPP of the energy source connected to an output of the energy source, and a control unit configured to command, at predefined intervals, changes in the chopper circuit's duty cycle as a function of the control loop's set-value signal. The control loop includes means for analog storage of pieces of information corresponding to output voltages from the energy source for at least three successive duty cycles, and an analog comparison unit delivering an output, as a function of the stored pieces of information, and a set-value signal for increasing or reducing of the duty cycle by the control unit. | 12-08-2011 |
20110298442 | Converter Circuit and Electronic System Comprising Such a Circuit - A converter circuit for connecting to a source of electrical energy that is capable of major fluctuations in delivered power. The circuit includes a chopper circuit having a variable duty cycle, a variable-size chopper switch and an input terminal connectable to said electric energy source; at least one first output circuit adapted to being connected via a variable-size chopper switch to an output terminal of the chopper circuit; and a control circuit configured to control firstly the duty cycle of the chopper circuit and secondly the size of said variable-size switches as a function of the power delivered by said electrical energy source. | 12-08-2011 |
20110298443 | LOAD DRIVING DEVICE AND ELECTRICAL APPARATUS - The load driving device disclosed in the specification includes a controller to generate a first control signal based on an input signal, a first output transistor to supply an output current to a load according to the first control signal, a first dividing circuit to output a first divided voltage by dividing a voltage across a first primary electrode and a second primary electrode of the first output transistor by a first transistor and a second transistor connected in serial, a first voltage generating circuit to output a first reference voltage, and a first comparator to supply a first over current detection signal to the controller based on the first reference voltage and the first divided voltage. | 12-08-2011 |
20110309813 | Field Device of Process Automation - A field device of process automation technology having an interface for output of an electrical current signal and a specifying unit, which provides a value, on which depends an electrical current signal to be output via the interface. A first controllable electrical current sink and a second controllable electrical current sink are provided. The first controllable electrical current sink and the second controllable electrical current sink are settable to predeterminable electrical current levels, and that the first controllable electrical current sink and the second controllable electrical current sink are connected with the interface in such a manner that the electrical current signal which at the interface essentially depends on the lower of the predeterminable electrical current levels, to which the first controllable electrical current sink and the second controllable electrical current sink are set. | 12-22-2011 |
20110316513 | DEVICE AND METHOD FOR SINGLE BOARD ENERGY-SAVING AND SINGLE BOARD - The embodiments of the present invention disclose a single board energy-saving device, which includes: a power calculation module, configured to detect the input current of the single board, and calculate the real-time power of the single board according to the detected input current and a previously measured and obtained input voltage of the single board; a single board energy-saving control module, configured to determine the load condition of the single board according to the real-time power of the single board and send a voltage adjustment command according to the load condition; a power supply adjustment module, configured to receive the voltage adjustment command and adjust the bus voltage of the single board according to the voltage adjustment command. The corresponding embodiments of the present invention also disclose a single board energy-saving method and a single board. Through the foregoing technical solutions, energy-saving is realized for the single board. | 12-29-2011 |
20120001611 | DC/DC CONVERTER AND ELECTRONIC APPARATUS - A DC/DC converter comprising: a switching element; a driving unit configured to turn on/off the switching element based on a pulse width of a control signal; a control unit configured to generate the control signal based on a voltage signal; and a generation unit configured to generate the voltage signal by connecting a detection unit having a resistor corresponding to a temperature and a resistance element in series, and dividing a reference voltage by the detection unit and the resistance element. | 01-05-2012 |
20120007574 | SWITCHING CIRCUIT AND TEST APPARATUS - Provided is a switching circuit with high withstand voltage. The switching circuit switches whether two terminals are electrically connected to each other, according to a switching signal input thereto. The switching circuit comprises a first switching section that switches whether the two terminals are electrically connected to each other; a first control section that is electrically insulated from the first switching section and controls the first switching section according to an input current; a second switching section that switches whether the input current is input to the first control section; and a second control section that is electrically insulated from the second switching section and controls the second switching section according to the switching signal. | 01-12-2012 |
20120007575 | METHOD AND APPARATUS FOR CONTROLLING THE MAXIMUM OUPUT POWER OF A POWER CONVERTER - An example controller for a power converter includes an input voltage sensor, a current sensor, an oscillator, a timing and multiplier circuit, and a drive signal generator. The input voltage sensor receives an input signal representative of an input voltage and the current sensor senses a current in a power switch. The oscillator generates a signal having a switching frequency and the timing and multiplier circuit adjusts the switching frequency of the signal to be proportional to a value that is the input voltage multiplied by a time it takes the current in the power switch to change between two current values. The drive signal generator drives the power switch into the on state for an on time period and an off state for an off time period in response to the current in the power switch and in response to the signal having the switching frequency. | 01-12-2012 |
20120019227 | POWER SUPPLY CIRCUIT - An apparatus for selecting either a High VIN path or a Low VIN path from a voltage source to a low voltage circuit is disclosed. The apparatus has a clamped step down circuit operable to select the High VIN path when a voltage level from the voltage source is above or equal to a pre-determined voltage level and, a power supply control circuit operable to select the Low VIN path when the voltage level from the voltage source is below the pre-determined voltage level. | 01-26-2012 |
20120019228 | SYNCHRONOUS RECTIFIER CONTROL FOR SYNCHRONOUS BOOST CONVERTER - A synchronous boost DC/DC conversion system comprises an input for receiving a DC input voltage, an output for producing a DC output voltage, a power switch controllable to adjust an output signal of the conversion system, and an inductor coupled to the input. A synchronous rectifier is configurable to create a conduction path between the inductor and the output to provide the inductor discharge. A control circuit is provided for controlling the synchronous rectifier as the input voltage approaches the output voltage, so as to adjust average impedance of the conduction path over a discharge period of the inductor. | 01-26-2012 |
20120025800 | VOLTAGE MODE TRANSMITTER EQUALIZER - A voltage mode transmitter equalizer has high efficiencies, yet consumes substantially constant supply current from the power supply and provides constant back-match impedance. The voltage mode transmitter equalizer is configured such that the output voltage of the signal to be output on a pair of transmission lines can be controlled according to the input data, but its return impedance is substantially matched to the differential impedance of the transmission lines and it draws substantially constant supply current from the power supply regardless of the output voltage of the signal. Further, an equalizer for a voltage-mode transmitter provides fine-granularity equalization settings by employing a variable pull-up conductance and a variable pull-down conductance. Conductance is varied by selectively enabling a plurality of conductance channels, at least some of which have resistance values that are distinct from one another. | 02-02-2012 |
20120038343 | CONSTANT CURRENT SOURCE AND SOLID IMAGING APPARATUS USING THE SAME - A constant current source has a first current source circuit for outputting a first current; a second current source circuit for outputting a second current according to a reference voltage; a current comparison circuit for comparing magnitudes of the first and second currents; and a current adjustment unit for adjusting a current value of the first current output from the first current source circuit in accordance with a comparison result of the current comparison circuit. | 02-16-2012 |
20120062202 | APPARATUS AND METHOD FOR TRACKING MAXIMUM POWER POINT AND METHOD OF OPERATING GRID-TIED POWER STORAGE SYSTEM USING THE SAME - An apparatus for tracking a maximum power point includes a converter unit for converting a first power, outputted from a solar cell module, into a second power and a maximum power point control unit for searching for a maximum power point voltage and an open-circuit voltage corresponding to a temperature and solar radiation of the solar cell module, decreasing voltage of the first power from the open-circuit voltage to the maximum power point voltage in a soft-start manner, and then performing Maximum Power Point Tracking (MPPT) control according to a Perturbation and Observation (P&O) algorithm. | 03-15-2012 |
20120098516 | DRIVER FOR COOPERATING WITH A WALL DIMMER - A current correction circuit ( | 04-26-2012 |
20120112726 | POWER SUPPLY CONTROLLER - A power supply controller includes a power supply section, a power supply controlling section connected to the power supply section, a starter switch being switched selectively to a first status and a second status, a o power switch being switched selectively to a first status and a second status, a controlling section connected to the power switch, and a function section operable to execute a predetermined operation. The power supply controlling section causes a power to be supplied from the power supply section to the controlling section when at least one of the power switch and the starter switch is in the first status. This power supply controller does not malfunction even when the starter switch malfunctions, thus preventing wasteful consumption of the power supply section. | 05-10-2012 |
20120119722 | POWER CONVERTER CONTROL METHOD - Optimizes the operation and control of electric generators against events produced in the power grid, such as voltage dips or overvoltages, comprising the following steps: detecting that the DC bus voltage level (V | 05-17-2012 |
20120133350 | DIRECT CURRENT VOLTAGE SUPPLY APPARATUS - A DC voltage supply apparatus including a voltage detection unit, an enable signal processing unit, a latch unit, a control unit and a voltage transforming unit is provided. The voltage detection unit receives and detects a DC input voltage to generate an input voltage state signal. The enable signal processing unit receives the input voltage state signal and an enable signal, and determines a state of the enable signal according to the input voltage state signal. When the enable signal is ineffective, the latch unit latches the enable signal to keep an ineffective state. The control unit receives the enable signal, and generates a control signal. When the control signal is effective, the voltage transforming unit receives the DC input voltage and transforms the DC input voltage into a DC output voltage. When the control signal is ineffective, the voltage transforming unit stops receiving the DC input voltage. | 05-31-2012 |
20120153924 | Voltage Regulator Soft-Start Circuit - Techniques are disclosed for providing an improved start-up (soft-start) circuit for use with voltage regulators, and an improved regulator start-up methodology. For example, an apparatus comprises a voltage regulator circuit and a start-up circuit operatively coupled to the voltage regulator circuit. The start-up circuit is configured to provide a current signal, during a start-up period, that generates a reference voltage at a reference input of the voltage regulator circuit such that the reference voltage ramps up at a rate substantially equal to a ramp-up rate of a supply voltage coupled to the start-up circuit and the voltage regulator circuit. | 06-21-2012 |
20120187933 | AUTOMATIC POWER SUPPLY SELECTION FOR DUAL MODE COMPONENT - This disclosure is directed to techniques for automatically controlling a dual mode component of a device to operate according to a first mode or a second mode. According to these techniques, a device or circuit may include a first power supply input terminal and a dual mode component that includes a second power supply input terminal. The device or circuit further includes an automatic power supply selection module configured to compare a voltage level at the first power supply input terminal to a predetermined threshold, and based on the comparison, supply one of a first mode voltage level or a second mode voltage level to the second power supply input terminal. The first mode voltage level may cause the dual mode component to operate in a first mode, while the second mode voltage level may cause the dual mode component to operate in a second mode different than the first mode. | 07-26-2012 |
20120200278 | METHODS AND APPARATUSES FOR ELECTRICAL PULSE ENERGY CAPTURE - Methods and apparatuses are disclosed for power conversion for fuzes and other electrical power consumers. A current monitor coupled to a power source signal generates a source current indicator. A controller generates a control signal responsive to the source current indicator. A filter well is coupled to the power source signal. An inductive switch circuit switchably grounds a rectified inductive load coupled to an output side of the filter well in response to the control signal, developing a pulsed power signal. A resonance rectifier presents substantially lossless resistive impedance for the pulsed power signal and rectifies the pulsed power signal to charge a charge storage device and generate a power output signal. The filter well, the inductive switch circuit, and the controller maintain the source current indicator within a predetermined current range by filtering the pulsed power signal and adjusting the control signal's frequency responsive to the source current indicator. | 08-09-2012 |
20120229114 | DC/DC BOOST CONVERTER - A DC/DC boost converter includes a first boost driving unit, a second boost driving unit connected in parallel with the first boost driving unit, and a capacitor electrically connected to the first and second boost driving units. The first boost driving unit is utilized for performing a first driving operation according to an input voltage and a first control signal. The first driving operation includes a first energy-storing operation and a first energy-releasing operation. The second boost driving unit is utilized for performing a second driving operation according to the input voltage and a second control signal different from the first control signal. The second driving operation includes a second energy-storing operation and a second energy-releasing operation. The first and second energy-releasing operations are employed to alternately charge the capacitor for generating an output voltage. | 09-13-2012 |
20120249108 | CONSTANT FREQUENCY ON-TIME CONTROL SYSTEM AND METHOD AND VOLTAGE REGULATOR USING THE SAME - A constant frequency ON-time control system applied to a voltage regulator is disclosed. The voltage regulator determines a time length of an input voltage inputted thereto according to an ON-time and thereby regulates an output voltage. The constant frequency ON-time control system includes a constant frequency ON-time control circuit for computing the ON-time according to a system duty cycle of the voltage regulator and a frequency setting parameter and a frequency setting parameter adjusting circuit for generating a frequency setting parameter adjust value according to an OFF-time corresponding to the ON-time and taking a result of operation between the frequency setting parameter adjust value and a preset frequency setting parameter as the frequency setting parameter. The frequency setting parameter adjusting circuit uses the frequency setting parameter adjust value to change the result of operation for varying the frequency setting parameter when the OFF-time is shorter than a reference value. | 10-04-2012 |
20120249109 | Communication system with monitored input state of an input device as well as current-increasing device - The present invention concerns a communication system with monitored input state of an input device. The input device has an input connection, a ground connection and an input circuit connected between the input connection and the ground connection. The input circuit is designed to detect an input signal. A sensor device is also provided, which is connected to the input connection and optionally the ground connection. The communication system also has a current-increasing device connected to the input connection and the ground connection, which is designed to furnish an increased current for the input circuit for an adjustable time period as a function of the voltage lying on the input connection. A power supply is also provided to supply power to the sensor device. | 10-04-2012 |
20120249110 | POWER CONVERTER - A power converter ( | 10-04-2012 |
20120280671 | On-time Control Module and On-time Control Method - The present invention discloses an on-time control module for compensating a switching frequency in a switching regulator. The on-time control module includes an average voltage generating circuit, for generating an average voltage related to a duty according to an input voltage and the duty, and an on-time controller, for generating a control signal of an on-time related to the duty according to the input voltage and the duty voltage. | 11-08-2012 |
20120326690 | MOS TRANSISTOR DRAIN-TO-GATE LEAKAGE PROTECTION CIRCUIT AND METHOD THEREFOR - A circuit having an active mode and a sleep mode includes a power transistor, an amplifier, and a protection circuit. The power transistor has a first current electrode coupled to a first power supply terminal, a second current electrode as an output of the circuit for coupling to a load, and a control electrode, wherein the power transistor is characterized by having a threshold voltage and a leakage current, wherein the leakage current occurs between the control electrode and the first current electrode during the sleep mode. The amplifier has an output coupled to the control electrode of the power transistor that provides an active output during the active mode. The protection circuit detects the leakage current and prevents the leakage current from developing a voltage on the control electrode of the power transistor that exceeds the threshold voltage of the power transistor. | 12-27-2012 |
20120326691 | VOLTAGE CONVERTER HAVING AUXILIARY SWITCH IMPLEMENTED THEREIN AND RELATED VOLTAGE CONVERTING METHOD THEREOF - A voltage converter has an input terminal and only N output terminals, and includes a DC-DC power supply block having an input node and an output node, (N+1) switches including N main output switches and an auxiliary switch each having a first end and a second end, and a switch control circuit. The DC-DC power supply block includes an inductor, and a switch module configured for alternating between a first interconnection configuration and a second interconnection configuration during a predetermined time period. First ends of the (N+1) switches are coupled to the output node, and second ends of the N main output switches are coupled to the N output terminals, respectively. The switch control circuit is configured for controlling the switch module and the (N+1) switches, wherein the (N+1) switches are switched on alternately during the predetermined time period. | 12-27-2012 |
20120326692 | POWER-SUPPLY CONTROL APPARATUS AND POWER-SUPPLY CONTROL METHOD - A power-supply control apparatus uses a margin setting unit to set the value of a margin that is added to a request voltage value VID | 12-27-2012 |
20130015832 | VOLTAGE REGULATOR AND MEMORY DEVICE INCLUDING THE SAMEAANM YOON; Gil WonAACI Hwaseong-siAACO KRAAGP YOON; Gil Won Hwaseong-si KRAANM JUNG; Dong IlAACI Hwaseong-siAACO KRAAGP JUNG; Dong Il Hwaseong-si KR - A voltage regulator and a memory device including same are provided. The voltage provider includes a resistive circuit configured to output at least one divided voltage; at least one driver circuit configured to be connected to the resistive circuit and to set the at least one divided voltage; and a compensation circuit configured to be connected to the at least one driver circuit, to receive a predetermined voltage, and to apply a power supply voltage to the at least one driver circuit. The at least one driver circuit may set the at least one divided voltage based on the power supply voltage received from the compensation circuit. | 01-17-2013 |
20130033249 | CONTROL OF DELIVERY OF CURRENT THROUGH ONE OR MORE DISCHARGE LAMPS - A process for controlling a current supplied to a load includes, in at least one aspect, detecting input to control a current supplied to a load operated by a driving signal, and in response to detecting the input, modifying the driving signal to control the current supplied to the load, wherein modifying the driving signal comprises alternately applying a first duty cycle and a second duty cycle to the driving signal. | 02-07-2013 |
20130063117 | MAXIMUM POWER POINT TRACKING METHOD - A maximum power point tracking method is provided. The method includes temporarily determining a next voltage command using voltage and power measured at current and previous time points. When an increase or decrease in voltage command is continued predetermined times or more, it is decided that the next voltage command temporarily determined to be increased is decreased or that the next voltage command temporarily determined to be decreased is increased. The output voltage of a solar cell is regulated based on the decided next voltage command. | 03-14-2013 |
20130113452 | System and Method for Power Conversion for Renewable Energy Sources - A power converter is configured to transfer energy from a photovoltaic (PV) array to a DC bus internal to the power converter. The power converter executes a modulation module to selectively connect one or more switching devices between the output of the PV array and the DC bus. The power converter is configured to operate in multiple operating modes. In one operating mode, the converter operates with a fixed modulation period and a variable on time, and in another operating mode, the converter operates with a variable modulation period and a fixed on time. The improved power converter provides highly efficient low power energy capture, improving power efficiency and enabling energy capture in low light conditions with reduced converter losses. | 05-09-2013 |
20130119957 | Bi-directional Switching Regulator and Control Circuit Thereof - The present invention discloses a bi-directional switching regulator and its control circuit, wherein the bi-directional switching regulator converts an input voltage to an output voltage in a power supply mode, and it includes: a power stage including an upper gate switch, a lower gate switch and an inductor coupled to a common switching node, wherein the inductor is coupled to the input voltage; a load switch coupled between the output voltage and the upper gate switch; and a driver circuit controlling the load switch to adjust an output current flowing through the load switch according to current information at an input terminal of the input voltage. | 05-16-2013 |
20130119958 | Wide Input Voltage Range Power Supply Circuit - A wide input voltage power supply circuit for a load includes a first stage and a second stage. The first stage includes a linear regulator circuit configured to maintain an output voltage at a predetermined output voltage level. The linear regulator includes an input for shutting the linear regulator off when an input voltage exceeds a predetermined shut off threshold. The second stage includes a high voltage detection circuit coupled to the input of the linear regulator. The high voltage detection circuit is configured to detect the level of the input voltage and to shut the linear regulator off when the input voltage exceeds the predetermined shut off threshold. An under voltage lockout circuit may be included, the under voltage lockout circuit configured to set a minimum turn-on voltage for the load. | 05-16-2013 |
20130119959 | VOLTAGE ADJUSTING DEVICE FOR SOLID STATE DRIVE - A voltage regulating device includes a connector, a slot, a voltage regulating circuit, and a control module. The connector is obtains an initial voltage from an external power supply. The slot is configured for electrically connecting to a load. The voltage regulating circuit is connected between the connector and the slot. In accordance with user input into a keyboard connected to a control microchip as to a voltage level required, the voltage regulating circuit converts the initial voltage to a required test voltage and outputs the required test voltage to the load by the slot. The control microchip controls the voltage regulating circuit to convert the initial voltage into the required test voltage. | 05-16-2013 |
20130119960 | APPARATUS, METHOD AND SYSTEM FOR CONTROL OF AC/AC CONVERSION - A method, system and apparatus for controlling a pulse width modulator (PMW) converter for direct AC/AC conversion and/or AC voltage regulation. According to some embodiments of the invention, an output voltage may be provided, independent of the input voltage quality, thereby avoiding or minimizing power company irregularities, brownouts and the like. Embodiments of the present invention may be useful, for example, for use in connection with motors and motored devices or other applications. | 05-16-2013 |
20130119961 | DC/DC CONVERTER - In a DC/DC converter, a first operation section calculates a first operation value, based on a difference voltage between an instruction value for a high-voltage-side voltage and a detected value of a high-voltage-side voltage, a second operation section calculates a second operation value, based on a difference voltage between a voltage instruction value for a charge-discharge capacitor and a voltage detected value of the charge-discharge capacitor, and a switching control section obtains a conduction ratio, based on the first operation value and the second operation value, and controls, based on the conduction ratio, switching operations of first to fourth semiconductor circuits, thereby controlling the high-voltage-side voltage, and the voltage of the charge-discharge capacitor. | 05-16-2013 |
20130134955 | Method for Operation of a Photovoltaic Generator at an Operating Point of Maximum Power - A method includes searching for a point of maximum power based on a systematic load variation, setting the point of maximum power as the operating point of the photovoltaic generator, and tracking the operating point based on a load variation with a narrow variation range. The method also includes analyzing operating variables of the photovoltaic generator to determine the level of probability that the operating point deviates from the point of maximum power, selectively interrupting the tracking and carrying out another search to determine the point of maximum power as a function of the analysis of the operating variables, and setting the point of maximum power as the operating point, and resuming the tracking. The method further takes into account previous searches carried out in the presence of comparable operating variables to determine the probability. | 05-30-2013 |
20130169256 | Low EMI Driver Circuit - A driver circuit, in accordance with one example, includes a controllable current source operably coupled to the load and configured to sink or source a first current in accordance with a control signal. A controllable switch is responsive to an input signal, operably coupled to the current source, and configured to take over, or not, the first current in accordance with an input signal. The first current is directed as a load current through the load when the controllable switch is driven into a blocking state. The first current is directed through the controllable switch when the controllable switch is driven into a conducting state thus bypassing the load. An input signal includes a first series of pulses defining the desired load current waveform in accordance with a desired modulation scheme. | 07-04-2013 |
20130193945 | Distributed Power Harvesting Systems Using DC Power Sources - A method for maintaining reliability of a distributed power system including a power converter having input terminals and output terminals. Input power is received at the input terminals. The input power is converted to an output power at the output terminals. A temperature is measured in or in the environment of the power converter. The power conversion of the input power to the output power may be controlled to maximize the input power by setting at the input terminals the input voltage or the input current according to predetermined criteria. One of the predetermined criteria is configured to reduce the input power based on the temperature signal responsive to the temperature. The adjustment of input power reduces the input voltage and/or input current thereby lowering the temperature of the power converter. | 08-01-2013 |
20130200874 | DC POWER SUPPLY APPARATUS - A direct current (DC) power supply apparatus includes an input unit configured to receive an outside DC power; a plurality of polarity correction units configured to correct the polarity of the outside DC power; a plurality of switch units installed to correspond to each of the plurality of polarity correction units; a detection unit configured to detect a flow of current of the plurality of polarity correction unit; and a control unit configured to determine a polarity correction unit, at which current of DC power flows, among the plurality of correction units based on a detection signal of transmitted from the detection unit, and control the switch unit corresponding to the determined polarity correction unit at an ON position such that the current of DC power flows through the switch unit which is controlled at the ON position. | 08-08-2013 |
20130214755 | STABILIZATION SYSTEM AND METHOD FOR INPUT OSCILLATION - A system and method for controlling power supply input filter oscillations is provided. The method includes utilizing a converter power circuit to generate a positive input resistance to counteract input filter oscillations, which are generated in response to normal converter negative input impedance and current-mode control operation. A controller controls the converter power circuit to generate the positive resistance utilizing a first input corresponding to the voltage applied to the converter input. A second input disables the converter power circuit based on completion of output capacitor charge, the first and second inputs being different. | 08-22-2013 |
20130214756 | WIDE INPUT VOLTAGE RANGE POWER FACTOR CORRECTION CIRCUIT - A boost circuit is used for power factor correction (PFC). In a low power application, transition mode control is utilized. However, switching frequency varies with different input voltages, and over a wide input voltage range, the switching frequency can become too high to be practical. To address this issue, a boost circuit is provided whose effective inductance changes as a function of input voltage. By changing the inductance, control is exercised over switching frequency. | 08-22-2013 |
20130229163 | OVERVOLTAGE PROTECTION CIRCUIT AND ELECTRONIC DEVICE - An overvoltage protection circuit is arranged in an electronic device for providing a proper working voltage to the electronic device. The overvoltage protection circuit includes a first selecting circuit and a second selecting circuit connected in parallel to the first selecting circuit between a voltage input port and a voltage output port of the overvoltage protecting circuit. When an input voltage from the input port is less than a first value, the input voltage is output to the output port directly through the first selecting circuit, and when the input voltage is greater than the first value, the input voltage is output to the output port after the value of the input voltage is reduced through the second selecting circuit. | 09-05-2013 |
20130229164 | VOLTAGE DISCHARGE OPTIMIZATION - One embodiment of an apparatus to control and sense a voltage through a single node can include a comparator to monitor single node voltage, a transistor to discharge voltage through the single node and control logic. The control logic can have at least two operational phases when actively controlling the voltage through the single node. In a first phase, the control logic can configure the comparator to determine if the single node voltage is greater than a reference voltage. In a second phase, the control logic can configure the transistor to discharge voltage through the single node when the comparator has previously indicated that the single node voltage is greater than a reference voltage. The control logic can alternatively execute first and second phases to discharge the voltage to a predetermined level. | 09-05-2013 |
20130229165 | AC COUPLED SINGLE-ENDED LVDS RECEIVING CIRCUIT COMPRISING LOW-PASS FILTER AND VOLTAGE REGULATOR - A receiving circuit is provided that can accurately detect a clock signal that has a single phase and a small amplitude. A receiving circuit includes an AC coupled circuit | 09-05-2013 |
20130257405 | ADD-ON BOOST CONVERTER FOR A SOLAR ENERGY SYSTEM - Exemplary embodiments are directed to a boost converter module for a solar energy system. The boost converter module includes input poles, output poles, and a boost converter unit connected between the input poles and the output poles. The input poles can be adapted for connection to a photovoltaic device feeding an input direct voltage (DC | 10-03-2013 |
20130265027 | STEP-UP CIRCUIT - A step-up circuit includes a capacitor, a transistor connected to the capacitor, and a reference voltage generator circuit configured to supply the transistor with a reference voltage that causes a rate of voltage increase relative to supply voltage to vary in accordance with the supply voltage. | 10-10-2013 |
20130271102 | POWER SUPPLY CONTROL STRUCTURE - A power supply control structure includes a voltage detection unit connected to a main power supply, a current control unit connected to the voltage detection unit, and switch units connected to different output points provided on the current control unit. The voltage detection unit detects a voltage value of the main power supply, the current control unit turns on one of the switch units via one of the output points according to the detected voltage value of the main power supply, so that loads respectively connected to the switch units always have the same output power even when the voltage value of the input main power supply is changed and batteries serving as the input main power supply can provide extended operating time. | 10-17-2013 |
20130271103 | Power-Gated Electronic Device - A power-gated electronic device and a method of operating the same is provided. The power-gated electronic device comprises a low drop out voltage power supply (LDO), an auxiliary power supply and at least one electronic domain having a power gate. The LDO provides a supply voltage to the at least one electronic domain which is coupled to a supply rail of the LDO via a switch, acting as a power gate. The auxiliary power supply comprises at least one current source which is coupled to the electronic domain via an auxiliary switch acting as an auxiliary power gate. The auxiliary power supply is configured to control the auxiliary switch as a function of a voltage difference between a reference voltage and the auxiliary supply voltage. | 10-17-2013 |
20130271104 | SOFT-START TIME CONTROL CIRCUIT - A control circuit for controlling a soft-start time of a DC power supply includes a digital potentiometer, a first drive circuit, and a controller. The digital potentiometer includes a first potentiometer. The first drive circuit includes a first driver, a first MOSFET, and a first charge capacitor. The first driver charges the first charge capacitor via the first potentiometer when the DC power supply is first switched on, and the first MOSFET is switched on to connect the DC power supply to the load when the first charge capacitor is fully charged. The controller regulates resistance of the first potentiometer to regulate a charge time constant of the first charge capacitor, enabling a gradual rise in voltage supplied, from approximately zero to full power, within a desired period of time. | 10-17-2013 |
20130285636 | POWER TRACKING DEVICE AND POWER TRACKING METHOD - A power tracking device and a power tracking method is disclosed herein. The power tracking device includes a power voltage setting circuit, a switch, a switching signal circuit, and a voltage memory circuit. The switching signal circuit is configured for sending a first control signal to the switch. When the switch receives the first control signal and electrically isolates the power source and the power voltage setting circuit, the voltage memory circuit stores an open circuit voltage of the power source and sends a setting voltage relative to the open circuit voltage, and when the switch receives the first control signal and electrically connects the power source and the power voltage setting circuit, the power voltage setting circuit sets an output voltage of the power source to correspond with the setting voltage. | 10-31-2013 |
20130314066 | DELAY CIRCUIT AND ELECTRONIC DEVICE HAVING THE SAME - An electronic device receives a voltage from a power supply. The electronic device includes a load, a first adjusting module, a switching module, a delay module, and a second adjusting module. The first adjusting module produces a working voltage when the electronic device is powered on. The switching module establishes an electrical connection between the first adjusting module and the load when receiving the working voltage, and cuts off the electrical connection when not receiving the working voltage. The delay module delays outputting the working voltage to the load for a first predetermined time period on power on, and maintains a power supply to the load for a second predetermined time period after power off. Both the first predetermined time period and the second predetermined time period are independently adjustable. | 11-28-2013 |
20130328539 | SYSTEM FOR TRANSFERRING ENERGY FROM AN ENERGY SOURCE AND METHOD OF MAKING SAME - A system for transferring energy from an energy source includes a first energy source, a DC link coupled to a DC load, a first DC-to-DC voltage converter coupled to the DC link, and a second DC-to-DC voltage converter coupled to the first energy source. A controller is coupled to the first and second DC-to-DC voltage converters and configured to determine a voltage level of the first energy source and of the DC link. If the voltage level of the DC link is less than the voltage level of the first energy source, the controller controls the second DC-to-DC voltage converter to draw energy from the first energy source to cause the DC voltage output from the first energy source and supplied to the first DC-to-DC voltage converter to be below the DC load voltage supplied to the DC link via the first DC-to-DC voltage converter. | 12-12-2013 |
20140015506 | POWER CONVERSION APPARATUS AND CONTROLLING METHOD THEREOF - A power conversion apparatus and a controlling method thereof are disclosed. The power conversion apparatus is applied with a power generation apparatus, which outputs a first signal. The power conversion apparatus includes a conversion-sensing circuit, a control signal generating circuit and a switching circuit. The conversion-sensing circuit converts the first signal into a second signal, and senses at least a voltage waveform change of the second signal to generate a time interval. The control signal generating circuit is electrically connected with the conversion-sensing circuit and outputs a control signal according to the time interval. The switching circuit is electrically connected with the power generation apparatus and the control signal generating circuit, and has a plurality switching elements. The switching circuit receives the first signal and conducts one of the switching elements according to the control signal so as to convert the first signal and output an output signal. | 01-16-2014 |
20140028277 | ELECTRIC DEVICE - Provided is an electric device, including: a secondary battery; and a power supply circuit for dropping an input voltage which is input from the secondary battery to an output voltage and outputting the output voltage to a load, in which the output voltage is stepwise dropped in accordance with the drop of the input voltage. | 01-30-2014 |
20140043007 | POWER SUPPLY APPARATUS AND METHOD, AND USER EQUIPMENT - Embodiments of the present invention provide a power supply apparatus and method, and a user equipment. In the embodiments of the present invention, charging protection for the battery electric core and a bypass function for the voltage boost circuit can be implemented through control that is performed on the switch device by the logic control circuit, so that additional impedance can be reduced and working efficiency can be improved. | 02-13-2014 |
20140062445 | VOLTAGE GENERATION CIRCUIT - A voltage generation circuit includes a plurality of voltage generation units each configured to include an internal voltage with a reference voltage, generate a detection signal based on a comparison result between the internal voltage and the reference voltage, and adjust the level of the internal voltage in response to an oscillation signal, a control unit configured to generate an oscillation control signal in response to the detection signals, an oscillator configured to generate the oscillation signal in response to the oscillation control signal, and a selective output unit configured to selectively supply the oscillation signal to one or more of the plurality of voltage generation units in response to the detection signals. | 03-06-2014 |
20140077784 | Power Converter and Operating Method Thereof - A power converter and an operating method therefore are disclosed. The power converter includes an output stage, an input voltage detecting unit, and a pulse width modulation (PWM) unit. The output stage is coupled between an input terminal and a ground terminal. The input voltage detecting unit is used to detect an input voltage. The PWM unit is coupled to the output stage and the input voltage detecting unit and used to provide a PWM signal to the output stage. The PWM unit adjusts an on-time of a switch conducting signal of the PWM signal according to the input voltage and a default voltage. When the input voltage is lower than the default voltage, the PWM unit increases the on-time of the switch conducting signal and a period of the PWM signal. | 03-20-2014 |
20140077785 | METHOD AND DEVICE FOR MAXIMUM POWER POINT TRACKING OF PHOTOVOLTAIC MODULE SYSTEMS - A method of maximum power point tracking for a photovoltaic module system is disclosed. The photovoltaic module system may comprise a photovoltaic module array comprising a plurality of identical photovoltaic modules, and the tracking method may comprise: detecting system parameters and environmental parameters of the photovoltaic module array; estimating a first voltage coefficient of one photovoltaic module according to the system parameters and the environmental parameters; estimating a plurality of second voltage coefficients of the photovoltaic module array according to the first voltage coefficient with different shading ratios; estimating a plurality of local maximum power point powers according to corresponding second voltage coefficients; and determining a whole maximum power point by comparing the local maximum power point powers with one another. | 03-20-2014 |
20140077786 | 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. | 03-20-2014 |
20140084893 | POWER SUPPLY CIRCUIT - Disclosed is a power supply circuit of an electric device. The power supply circuit comprises a power source configured to output a power source voltage; a power source voltage detecting circuit configured to detect the power source voltage, and to output a first voltage control signal; a leading edge delay circuit configured to receive the first voltage control signal, and to output a second voltage control signal; an electronic switch connected in series between the power source and the load, configured to turn on or turn off power supply from the power source to the load; and a slow turn-on circuit configured to receive the second voltage control signal. | 03-27-2014 |
20140084894 | Direct Current Link Circuit - A device for converting power from a floating source of DC power to a dual direct current (DC) output, the device includes: positive and negative input terminals connectible to the floating source of DC power; and positive and negative, and ground output terminals connectible to the dual DC output that may feed an inverter. The inverter may be either a two or three level inverter. A charge storage device may be connected in parallel to, and charged from, the positive and negative input terminals. A resonant circuit may be also connected between the charge storage device and the dual DC output. The resonant circuit may include an inductor connected in series with a capacitor. The charge storage device may discharge through the resonant circuit by switching through to either the negative output terminal or the positive output terminal. | 03-27-2014 |
20140091779 | SEMICONDUCTOR DEVICE - A semiconductor device includes a reference voltage generation circuit to which a power source voltage is applied; an output terminal for outputting an output voltage; a determining circuit connected to the reference voltage generation circuit and the output terminal for generating the output voltage according to a determination target voltage; and a constant electric current source connected to the determining circuit and a ground potential for generating a constant electrical current. | 04-03-2014 |
20140117964 | Dual Mode Power Supply Controller with Charge Balance Multipliers and Charge Balance Multiplier Circuits - A circuit for generating an output current includes a control signal generating circuit that is configured to generate a control signal. The control signal is a function of a level of an analog input voltage signal, and a level of the output current is a function of a level of an analog input current signal and the level of the analog input voltage signal. | 05-01-2014 |
20140132238 | SYSTEM AND METHOD FOR SENSING AND MITIGATING HYDROGEN EVOLUTION WITHIN A FLOW BATTERY SYSTEM - A method is provided for mitigating hydrogen evolution within a flow battery system that includes a plurality of flow battery cells, a power converter and an electrochemical cell. The method includes providing hydrogen generated by the hydrogen evolution within the flow battery system to the electrochemical cell. A first electrical current generated by an electrochemical reaction between the hydrogen and a reactant is sensed, and the sensed current is used to control an exchange of electrical power between the flow battery cells and the power converter. | 05-15-2014 |
20140139200 | ENERGY STORAGE SYSTEM AND METHOD THEREOF - An energy storage system (ESS) and a method thereof are disclosed. The system includes a maximum power tracking control unit changing a controlled variable for maximum power point extraction in proportion to an hourly current and power slope of the power generating unit, setting the change amount of the controlled variable to be relatively large if the hourly current and power slope is out of a predetermined hourly current and power slope range, and setting the change amount of the controlled variable to be relatively small if the hourly current and power slope is within a predetermined hourly current and power slope range, and a maximum power extracting unit extracting and converting a maximum power from the power generating unit in response to a control of the maximum power tracking control unit. | 05-22-2014 |
20140152286 | ANALOG FRONT-END COMPENSATION - In an embodiment, an apparatus may include a sense element that may measure a property such as, for example, pressure. The sense element may produce an output based on the measured property. Circuitry associated with the sense element may store a voltage that represents the output produced by the sense element. The circuitry may include, for example, a capacitor which may store the voltage. The stored voltage may include one or more parasitic components such as, for example, an offset voltage and/or voltage associated with current leakage. The circuitry may adjust the stored voltage to compensate for the parasitic components. The adjustment may occur over a series of phases of operation of the circuitry. | 06-05-2014 |
20140176108 | MAXIMUM POWER EXTRACTION DEVICE - Provided is a maximum power extraction devices including: a battery; a voltage control unit adjusting a size of a first power outputted from the battery according to a resistor selected from a plurality of resistors, and generating a compare signal according to a size difference between an operating voltage adjusting the size of the first power depending on the selected resistor and a reference voltage; a switching unit connected between the battery and a load and adjusting a size of the operating voltage according to a size difference of the compare signal in response to first and second switching control signals; a switching control unit generating the first and second switching control signals to allow a size between the operating voltage according to the compare signal and the reference voltage to be within an error range; and a maximum power control unit measuring the number of first operations obtained by counting the occurrence number of the first or second switching control signals for a predetermined time, when the compare signal is within the error range. | 06-26-2014 |
20140176109 | SOLAR POWER SUPPLY DEVICE - A solar power supply device includes a solar panel converting solar energy to electrical power with a DC voltage, a voltage convertor connected to the solar panel, a control unit, and a PWM signal processing unit. The voltage convertor converts the DC voltage to a power voltage to power the electrical equipment. The control unit outputs a first and a second PWM signal, and adjusts duty cycles of the first PWM signal and/or the second PWM signal by determining whether the electrical power output by the solar panel can drive the electrical equipment. The PWM signal processing unit multiplies the first PWM signal and the second PWM signal to obtain a third PWM signal, and output the third PWM signal to the voltage convertor to control the voltage convertor to output the corresponding power voltage. | 06-26-2014 |
20140184189 | INDUCTIVELY ASSISTED SWITCHED CAPACITOR DC-DC CONVERTER - In general, in one aspect, a direct-current to direct-current (DC-DC) converter adapted for converting a plurality of input voltages to a plurality of output voltages, comprising: a plurality of capacitors, a plurality of inductors, and a plurality of switches, and said switches interconnect said capacitors creating a switched capacitor circuit capable of operating at one of a plurality of distinct conversion ratios, wherein said plurality of inductors provide continuous modes from the plurality of distinct ratios and selection of an overall converter mode is based on an input voltage received. | 07-03-2014 |
20140239934 | SWITCHING CONVERTER WITH SLOPE COMPENSATION CIRCUIT - A switching converter with slope compensation circuit, the slope compensation circuit has a first voltage source, a first operation circuit, a first switch, a first capacitor, a second switch and a first controlled current source. | 08-28-2014 |
20140247033 | Low EMI Driver Circuit - A driver circuit, in accordance with one example, includes a controllable current source operably coupled to the load and configured to sink or source a first current in accordance with a control signal. A controllable switch is responsive to an input signal, operably coupled to the current source, and configured to take over, or not, the first current in accordance with an input signal. The first current is directed as a load current through the load when the controllable switch is driven into a blocking state. The first current is directed through the controllable switch when the controllable switch is driven into a conducting state thus bypassing the load. An input signal includes a first series of pulses defining the desired load current waveform in accordance with a desired modulation scheme. | 09-04-2014 |
20140253085 | Digital programmable control systems - A digital programmable control system, which is composed of a micro control module receives a detection result by using a detection module to detect a voltage and a current on a battery module and a bus module, and a judgment program in the micro control module determines whether the detection result meets a switching condition, and generates a control signal to control a bidirectional conversion module to perform a switching procedure in order to achieve the purpose of high accuracy regulation voltage and current. | 09-11-2014 |
20140266125 | Buck-Boost Voltage Converter Circuits for Solid State Lighting Apparatus - A voltage converter includes a converter circuit and a control circuit coupled to the converter circuit and configured to selectively operate the converter circuit in a boost mode or a floating buck mode in response to a level of an input voltage supplied to the voltage converter circuit. The converter circuit may further include an inductor, a first control switch coupled to the control circuit, and a second control switch coupled to the control circuit. The control circuit may be configured to control a state of the first control switch in the boost mode in response to a level of current in the inductor, and the control circuit may be configured to control a state of the second control switch in the floating buck mode in response to the level of current in the inductor. | 09-18-2014 |
20140266126 | SYSTEMS AND METHODS FOR EDGE CONTROL IN A SWITCHED OUTPUT STAGE - In accordance with embodiments of the present disclosure, systems and methods may include a switch coupled at its gate terminal to an input signal voltage, the input signal voltage for controlling a gate voltage of a gate terminal of a driver device coupled at its non-gate terminals between a rail voltage and an output node. The systems and methods may also include a diode having a first terminal and a second terminal, the diode coupled to a non-gate terminal of the switch such that when the switch is enabled, the first terminal is electrically coupled to the gate terminal of the driver device and the second terminal is electrically coupled to the output node. | 09-18-2014 |
20140292301 | Low Power Bias Compensation Scheme Utilizing A Resistor Bias - Compensation circuitry includes a resistor and transistor coupled in series with a reference current source to generate a variable reference voltage that is provided, via a voltage regulator, to bias elements of a core circuit in order to establish an operating current in the core circuit. In one embodiment, the resistor and transistor of the compensation circuitry are of similar construction to the bias elements of the core circuit, such that fluctuations in the ratio of the reference current and the operating current of the core circuit are minimized over process, supply voltage and temperature variations. The voltage regulator may be a low dropout regulator. In various embodiments, the core circuit may comprise a resistor biased voltage controlled oscillator, a differential current mode logic (CML) input to single CMOS output circuit, or like circuitry that may be sensitive to phase noise or requires low power operation. | 10-02-2014 |
20140300337 | INTELLIGENT VOLTAGE REGULATOR - A voltage regulator includes a programming interface via which programming instructions may be applied to a processor of the voltage regulator. The voltage regulator operates the processor according to the programming instructions to select one of multiple active internally-generated analog voltage levels to determine an output voltage level of the voltage regulator. | 10-09-2014 |
20140306681 | POWER SUPPLY DEVICE AND METHOD OF CONTROLLING THE POWER SUPPLY DEVICE - A voltage control unit is configured to: control, in accordance with an output voltage signal and an output current signal, output power of a rectifying unit to a voltage lower than a voltage by which an amount of generated power of a magneto AC generator becomes maximum; control a transformation ratio in accordance with the output voltage signal and the output current signal so as to improve power generation efficiency of the magneto AC generator one of when an rpm variation signal indicates an decelerating state and when the rpm variation signal indicates that a variation in rpm indicates a value smaller than a predetermined constant; and control the transformation ratio so as to decrease the output power of the rectifying unit when the rpm variation signal indicates an accelerating state. | 10-16-2014 |
20140306682 | CONTROL CIRCUIT, AND POWER GENERATION DEVICE HAVING THE SAME - Provided is a control circuit capable of efficiently supplying electric power from an alternating-current generator to a load, and a power generation device having this control circuit. A control circuit 1 for controlling electric power to be supplied from a power generator | 10-16-2014 |
20140312871 | APPARATUS AND METHOD FOR WETTING CURRENT MEASUREMENT AND CONTROL - A voltage signal and a wetting current are received from a switching device. A first pulse train is created from the voltage signal and the first pulse train has a first duty cycle that is proportional to the voltage at the switching device. The first pulse train is transmitted across an isolation barrier. The first pulse train that is received across the isolation barrier is digitized and at least one operating condition of the switching device is determined based upon the digitized pulse train. A second pulse train having a second duty cycle is received and the wetting current from the switching device is controlled based upon the second duty cycle. | 10-23-2014 |
20140333279 | CHOKE CIRCUIT, AND BUS POWER SUPPLY INCORPORATING SAME - The invention relates to a choke circuit and a bus power supply incorporating same. Such a coil choke circuit includes an inductor connected between a first input terminal and a first output terminal, a boost circuit connected between a second input terminal and a second output terminal for increasing the voltage level that is output by the second output terminal. A switching element is connected in parallel to the boost circuit for bypassing the boost circuit. Additionally, a comparator is connected between the first input terminal and the first output terminal for detecting a potential difference across the inductor; wherein in case the comparator detects a potential difference higher than a threshold, the switching element is controlled to be in an OFF state; and in case the comparator detects a potential difference lower than or equal to the threshold, the switching element is controlled to be in an ON state. | 11-13-2014 |
20140354258 | SUPPLY VOLTAGE CIRCUIT - A method includes using a charge pump to receive a first supply voltage and generate a voltage in response thereto. The method includes using the voltage generated by the charge pump to bias a supply voltage circuit to generate a second supply voltage. The second supply voltage is greater than the first supply voltage. | 12-04-2014 |
20140361760 | VOLTAGE REGULATION CIRCUITS AND POWER SUPPLY DEVICES USING THE SAME - A voltage regulation circuit is provided. The voltage regulation circuit regulates a level of a supply voltage provided by an automotive battery. The voltage regulation circuit includes a selector and an error amplifier. The selector receives a plurality of predetermined voltages and selects one of the plurality of predetermined voltages according to a control signal to serve as a first reference voltage. The error amplifier generates an error signal according to the first reference voltage and a feedback signal. The feedback signal is related to the supply voltage. The voltage regulation circuit regulates the level of the supply voltage according to the error signal. | 12-11-2014 |
20140375294 | POWER SUPPLY MODULE AND SOFT START METHOD - Embodiments of the present invention provide a power supply module and a soft start method. The power supply module includes an input detection circuit configured to output a first notification signal to a trigger drive circuit when it is determined that the power supply module receives a power supply signal; the trigger drive circuit configured to, upon receipt of the first notification signal sent from the input detection circuit, wait for a predetermined duration without sending a drive signal to a current limiting circuit, and to send the driver signal to the current limiting circuit when the predetermined duration elapses; and the current limiting circuit configured to limit a current on a Direct Current (DC) bus of the power supply module when the drive signal is not received by the current limiting circuit, and not to limit the current on the DC bus upon receipt of the drive signal. | 12-25-2014 |
20150028838 | ELECTRONIC APPARATUS AND POWER CONTROLLING METHOD - An electronic apparatus and a method of controlling power thereto are disclosed. The electronic apparatus including: a signal receiver configured to receive an input signal; a power supply configured to supply power to elements of the electronic apparatus; a controller configured to controls power supplied to the power supply; and a driving circuit configured to output an ON signal to the power supply in order to supply power to the elements of the electronic apparatus in response to the signal receiver receiving a preset frequency signal while the controller is turned off. Thus, the electronic apparatus is automatically turned on and off by an input signal of a predetermined frequency without a user's manipulation of an additional power switch, and thus, a user's convenience may be improved. | 01-29-2015 |
20150061633 | TECHNIQUE FOR SUPPLYING POWER TO A LOAD VIA VOLTAGE CONTROL AND CURRENT CONTROL MODES OF OPERATION - A regulator draws power from a battery or power delivery system and supplies regulated power to a load according to alternating modes of operation. In a voltage control mode, the regulator supplies power with a nominal voltage level and a fluctuating current level that is allowed to float according to the current demands of the load. When the load demands an amount of current that could potentially cause damage, the regulator transitions to a current control mode. In the current control mode, the regulator supplies power with a fluctuating voltage level and a maximum current level. The regulator transitions between voltage control mode and current control mode in order to supply a maximum power level to the load without exceeding the maximum current level. The regulator is also configured to limit the power drawn from the battery by decreasing the maximum output current, potentially avoiding voltage droop. | 03-05-2015 |
20150061634 | CURRENT LOOP INPUT PROTECTION - A protective circuit for a process control device such as a valve actuator, for example, prevents damage to device components. In particular, a protective circuit allows an analog current loop (e.g., 4-20 mA) to provide to a device component a secondary operating voltage, derived from the analog current loop, in the absence of a primary operating voltage source (e.g., during a power failure), such that the device component is not damaged when a signal from the analog current loop is applied to the process control device in the absence of the primary operating voltage source. | 03-05-2015 |
20150069992 | REFERENCE GENERATOR CIRCUIT WITH DYNAMICALLY TRACKING THRESHOLD - A circuit includes a reference circuit configured to receive a reference input voltage and provides a first output signal that is a function of the reference input voltage. The circuit includes a reference adjuster configured to receive an external input signal and generates a second output signal that is a function of the external input signal to control an offset voltage to adjust the first output signal. The first output signal and the second output signal are combined to provide a dynamic reference output signal. If the external input signal has crossed a predetermined threshold, the dynamic reference output signal tracks the external input signal while maintaining a substantially constant voltage difference relative to the external input signal. | 03-12-2015 |
20150077085 | SWITCHED-CAPACITOR DC-DC CONVERTER - A high power density switched-capacitor DC-DC converter is disclosed. According to one aspect, the subject matter described herein includes a high power-density switched-capacitor DC-DC converter that includes: first and second voltage summing circuits, each voltage summing circuit producing an output voltage that is substantially equal to an input voltage; and a switching circuit connected between the first and second voltage summing circuits and configured to provide a DC voltage source as an input to the first and second voltage summing circuits, wherein the converter produces an output voltage that is the sum of the voltage produced by the first voltage summing circuit, the voltage provided by the DC voltage source, and the voltage produced by the second voltage summing circuit. | 03-19-2015 |
20150084613 | ZERO CURRENT DETECTOR AND DC-DC CONVERTER USING SAME - A DC-DC converter includes a zero current detector. The DC-DC converter includes a high-side switch and a low-side switch. When the DC-DC converter works in a discontinuous conduction mode (DCM). The zero current detector detects a zero current a detection node which is arranged between the high-side switch and the low-side switch generates the zero current, the zero current detector outputs the control signal to a driver. The driver switches the high-side switch and the low-side switch off simultaneously according to the control signal. The zero current detector includes a temperature compensation unit to control a responsivity of the zero current detector which not influenced by temperature change. | 03-26-2015 |
20150102795 | LEVEL SHIFTER, DC-DC CONVERTER, AND LEVEL SHIFT METHOD - A level shifter includes: a first cascode portion, including a first transistor of a first conductivity type and a second transistor of a second conductivity type which are cascode-coupled to each other, configured to transmit a first input signal; a second cascode portion, including a third transistor of the first conductivity type and a fourth transistor of the second conductivity type which are cascode-coupled to each other, configured to transmit a second input signal; a latch portion configured to retain a first output signal and a second output signal obtained by changing, based on a first voltage obtained by boosting a power supply voltage, potential levels of the first input signal and the second input signal; and a potential-difference suppression circuit, coupled in parallel to the first cascode portion, configured to control a potential difference between source and drain of each of the first transistor and the second transistor. | 04-16-2015 |
20150108962 | POWERED DEVICE - A powered device is electronically connected to power sourcing equipment (PSE), to receive voltage signals from the PSE. The powered device comprises a rectifier unit, a recognition unit, a control unit, a converter and a powered circuit. The recognition unit identifies that the PSE is an Ethernet PSE or a DC PSE. The control unit controls whether the control unit output a negative voltage signal output by the rectifier unit, according to a positive voltage signal output by the rectifier unit and a identified result output by the recognition unit. The converter converts the negative voltage signal and the positive voltage signal to a working voltage of the powered circuit, to drive the powered circuit. To feed power by a single interface and identify that the PSE is the Ethernet PSE or the DC PSE, according to a simple circuit architecture. | 04-23-2015 |
20150115927 | METHOD AND APPARATUS FOR GENERATING A DIRECT CURRENT BIAS - A voltage detector operates to detect a system power supply voltage and generate a trigger signal. A control signal generator responds to the trigger signal and generates a control signal. A DC bias generator responds to the control signal by generating a DC bias. The control signal controls the DC bias to have a first value when the power supply voltage is a first voltage and have a second value when the power supply voltage is a second voltage different from the first voltage, wherein the first value is different from the second value. A dynamic DC bias is generated which can not only support a larger voltage scope, but also significantly improves signal to noise ratio. The system power supply detection may concern stop/start operation of an automobile engine. | 04-30-2015 |
20150123639 | SYSTEM FOR CONTROLLING POWER-UP SEQUENCE - Disclosed is a system for controlling a power-up sequence applicable to a power controller of a lane departure warning system, including: one DC/DC converter unit configured to convert a first input voltage of input power and output the converted first input voltage as a first output voltage, and including four output terminals; and a comparator block unit including two comparators configured to monitor a state of the input power, and one or more comparators configured to generate a control signal for enabling a power output of a next sequence from the first output voltage. | 05-07-2015 |
20150123640 | CHARGE AND DISCHARGE SIGNAL CIRCUIT AND DC-DC CONVERTER - A charge and discharge signal circuit includes: high side transistors connected in series; low side transistors connected in series; high side drive circuits; low side drive circuits; and a drive signal generation circuit, wherein each drive circuit includes: a level shifter; a capacitor switch string connected in series, being connected in parallel with the transistor; and a drive part, to which an output of the level shifter is supplied, at least one pair of neighboring ones of the level shifters are commonly formed, and two neighboring ones of the drive parts receive a same output from the common shifters. | 05-07-2015 |
20150123641 | SYSTEMS, DEVICES, AND METHODS FOR CONTROL OF A POWER SUPPLY CONNECTION - A power supply control circuit for a portable electronic device is capable of connecting and disconnecting a power supply with respect to an electrical load of the device. The power supply control circuit offers a relatively quick transition time and low leakage current, making the control circuit particularly suitable for applications that require the power supply to remain connected to the electrical load at all times. | 05-07-2015 |
20150130439 | CURRENT BALANCING DEVICE AND METHOD - The present invention discloses a current balancing device and method capable of balancing an output current and an input current of a current loop. Said device comprises: a transmission circuit for outputting an output current and receiving an input current; at least one adjustable resistor set in the current loop for providing resistance according to at least one adjustment signal; and a current balancing circuit, coupled to the transmission circuit and the adjustable resistor, for determining whether the difference between the output and input currents satisfies a predetermined requirement in light of a predetermined duration and thereby generating the adjustment signal, wherein if the difference between the output and input currents fails to satisfy the predetermined requirement, the current balancing circuit will adjust the resistance of the adjustable resistor through the adjustment signal, so as to reduce the difference between the output and input currents. | 05-14-2015 |
20150331440 | POWER CONVERTER DEPENDENT ON A VOLTAGE RANGE THE INPUT VOLTAGE RESIDES IN - A power converter ( | 11-19-2015 |
20150372594 | CIRCUIT AND METHOD FOR ACTIVE CROSSTALK REDUCTION IN MULTIPLE-CHANNEL POWER SUPPLY CONTROLLERS - A comparator sense input is disconnected from a current sense resistor for the duration of a switching transition in an adjacent channel(s). Instead, the sense input receives a signal of the magnitude and the slew rate sampled prior to the transition. | 12-24-2015 |
20150381042 | Isolator Including Bi-Directional Regulator - An apparatus includes a first terminal, a second terminal, a bi-directional regulator circuit, and functional circuitry. The bi-directional regulator circuit generates a voltage across a first power supply node and a second power supply node in response to an input current flowing through the first terminal and the second terminal with a first polarity. The bi-directional regulator circuit also generates the voltage across the first power supply node and the second power supply node in response to the input current flowing through the first terminal and the second terminal with a second polarity opposite the first polarity. The functional circuitry is powered by the voltage and is configured to generate a signal using the voltage. The signal is indicative of the input current in response to the input current being supplied to the first terminal and is indicative of the input current in response to presence of the input current. | 12-31-2015 |
20160065050 | POWER SOURCE CIRCUIT AND METHOD OF CONTROLLING POWER SOURCE CIRCUIT - A power source circuit includes a power source terminal for inputting a power source voltage; a switching regulator including a switching circuit connected to the power source terminal and a smoothing circuit connected to the switching circuit; a series regulator connected to the switching regulator in series; a switching portion; and a control portion. The smoothing circuit includes a capacitor and an inductor to output a first voltage. The series regulator is connected to the switching circuit and the smoothing circuit in series to output a second voltage. The switching portion supplies the power source voltage to the series regulator. The control portion outputs a switching signal for controlling the switching portion to turn on or off according to the power source voltage. | 03-03-2016 |
20160164406 | VOLTAGE PROTECTING CIRCUIT - Voltage protecting circuit includes a sensing unit coupled to a power adaptor, a control circuit board for controlling the power adaptor, and a switching unit coupled to the sensing unit and the control circuit board. The sensing unit senses a current voltage of the power adaptor; the control circuit board receives the current voltage of the power adaptor when the switching module is switched on. The control circuit board controls the power adaptor to supply a power voltage when the current voltage of the power adaptor is less than a reference voltage. When the sensing unit receives the power voltage, the switching unit is switched off for preventing the power voltage from flowing into the control circuit board. | 06-09-2016 |
20160164412 | CURRENT MODE SWITCHING POWER SUPPLY HAVING SEPARATE AC AND DC CURRENT SENSING PATHS - In a current mode switching power supply, current through the inductor needs to be sensed to control the peak current. The inductor current includes a DC component and an AC component containing switching noise. To reduce the switching noise, the actual inductor current is sensed to generate a signal, and a first AC component is attenuated by a first RC circuit while not attenuating a first DC component. A second AC component is derived by applying the rectangular wave switch voltage, which is at the duty cycle of the regulator, to a second RC filter, which blocks a second DC component. The second AC component is much larger than the first AC component and does not contain switching noise. The large second AC component, the smaller “noisy” first AC component, and the first DC component are applied to the first RC circuit to create a low-noise inductor current signal. | 06-09-2016 |
20160190913 | CONSTANT-VOLTAGE DRIVE DEVICE CAPABLE OF ADJUSTING OUTPUT VOLTAGE - A constant-voltage drive device capable of adjusting output voltage includes a chopping wave structure, an AC power voltage detection module, an AC voltage signal bias module, a power factor correction controller with multiplier, a power factor correction and energy conversion and transmission module, an output control module, a reference signal generation module, an AC power phase angle detection module and a phase angle information transmission module. The output voltage can be both constant and adjustable, so that the output changes with the phase angle information of input, and also provides the chopping wave structure with current for proper functioning. The device is applicable for bigger power range with better compatibility and stronger adaptability. | 06-30-2016 |
20160202718 | VOLTAGE GENERATION CIRCUIT | 07-14-2016 |
20160254663 | Current Loop Input Protection | 09-01-2016 |