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| Application No. | Application Title | Issue Date |
| 20120106213 | THREE-PHASE RECTIFIER A three-phase rectifier converts three-phase alternating current (AC) power supplied from a three-phase AC power supply into direct current (DC) power. The three-phase rectifier includes a full-wave rectifier circuit, a bidirectional switch circuit, and a controller. Th... | 05/03/2012 |
| 20120051105 | LED DRIVER WITH LOW HARMONIC DISTORTION OF INPUT AC CURRENT AND METHODS OF CONTROLLING THE SAME A method of controlling an output current of a power supply circuit comprising a first converter stage for receiving an input voltage, a second converter stage delivering a regulated output current, a controlled switch for conducting the input current and the output cur... | 03/01/2012 |
| 20120051104 | SINGLE-PHASE VOLTAGE TYPE AC/DC CONVERTER, THREE-PHASE VOLTAGE TYPE AC/DC CONVERTER, AND STABILIZATION CONTROL METHOD An object is to provide a single-phase voltage type AC/DC converting device and a three-phase voltage type AC/DC converting device arranged between a load and a distribution network and is capable of contributing to stabilize a system frequency and a system voltage, and... | 03/01/2012 |
| 20120026766 | CONTROL DEVICE OF A SWITCHING POWER SUPPLY A control device controls a switching converter that converts an alternating supply voltage to a regulated voltage and comprises a switch connected to an inductor. The control device is adapted to control the on period and the off period of said switch for each cycle. T... | 02/02/2012 |
| 20120014149 | POWER CONVERSION APPARATUS AND METHOD According to one embodiment a power conversion apparatus includes a first switch, a second switch, and a pulse generator. The first switch is connected at both ends of an AC power supply through an inductor and capacitor connected in series. The second switch is connect... | 01/19/2012 |
| 20110317458 | SWITCHED-MODE POWER SUPPLY CONTROLLING CIRCUIT AND SWITCHED-MODE POWER SUPPLY USING THE SAME A controlling circuit is provided for controlling an output voltage of a main circuit of a switched-mode power supply. The controlling circuit includes components that generate a switching status selecting signal reflecting a voltage change of the main circuit, and outp... | 12/29/2011 |
| 20110292699 | Systems and Methods for Distortion Reduction Systems and devices for reduction of total harmonic distortion in power supply circuits are presented. Example embodiments of the disclosed systems of total harmonic distortion reduction reduce a low frequency output voltage ripple seen by the voltage control loop by ad... | 12/01/2011 |
| 20110280052 | MULTILEVEL ELECTRIC POWER CONVERTER There is described a multilevel electric power converter circuit comprising: Ns switching elements connected in series in a closed loop; NAE additional elements, the additional elements being one of a direct current source and at least one passive ... | 11/17/2011 |
| 20110267856 | PFC WITH HIGH EFFICIENCY AT LOW LOAD A Power Factor Corrector (PFC), typically used as the first stage of switched mode power supplies, particularly suited for Universal Mains inputs, is disclosed, along with methods for controlling a switched mode power supply having power factor correction. In order to i... | 11/03/2011 |
| 20110235378 | POWER SUPPLY SYSTEM FOR ELECTRONIC DEVICE A power supply system includes an AC power source, a converter, a relay switch, and a waveform monitoring circuit. The AC power source provides an AC voltage. The converter is capable of converting the AC voltage into a DC voltage. The relay switch is connected between ... | 09/29/2011 |
| 20110051477 | Front-end circuit of power converter A front-end circuit of a power converter has a power connection wiring detecting circuit, a power switch and a control unit. The power connection wiring detecting circuit is connected to an AC power. The control unit is connected to the power connection wiring detecting... | 03/03/2011 |
| 20110043133 | LED-Based Lighting Power Supplies With Power Factor Correction And Dimming Control A power supply for powering one or more loads includes a boost circuit with power factor correction (PFC) that provides an operating voltage from an electrical power source, and a dimmer detection circuit that determines a dimming level applied to the electrical power s... | 02/24/2011 |
| 20110038189 | CLOSED-LOOP EFFICIENCY MODULATION FOR USE IN AC POWERED APPLICATIONS A system and method for closed-loop efficiency modulation for an AC/DC power system is provided. A boost-buck converter and a DC/DC converter connected in series receive a rectified DC feed signal from a AC input signal and deliver a modified DC output to an active load... | 02/17/2011 |
| 20100308733 | APPARATUS AND METHOD FOR CONSTANT POWER OFFLINE LED DRIVER A single-stage integrated circuit drives LED sources in a constant power mode to eliminate the need for LED current sensing, while reshaping the waveform of the inductor current near line zero crossing to achieve high power factor. The integrated circuit achieves substa... | 12/09/2010 |
| 20100308921 | LEAKAGE CURRENT REDUCTION IN A POWER REGULATOR A regulator with decreased leakage and low loss for a power amplifier is described. Switching circuitry is used to connect the regulator input bias to a bias control voltage when the power amplifier is to be operated in an on condition or to a voltage generator when the... | 12/09/2010 |
| 20100265743 | CONTACT-INPUT ARRANGEMENT FOR POWER SYSTEM DEVICES A contact-input circuit for a power system device is described for processing a higher voltage signal from power system equipment or another power system device for use by a lower voltage circuit. The contact-input circuit generally includes a voltage threshold detectio... | 10/21/2010 |
| 20100246222 | METHOD AND APPARATUS FOR DIGITAL CONTROL OF A SWITCHING REGULATOR Various techniques directed to the digital control of a switching regulator are disclosed. In one aspect, a power supply regulator includes a compare circuit to be coupled to receive a feedback signal representative of an output level of a power supply. This causes a fe... | 09/30/2010 |
| 20100213865 | Pulse Width Modulation Control Device The present invention relates to a pulse-width modulation (PWM) control device, especially to a PWM control device for use with a TRIode for an Alternating Current (TRIAC) dimmer. The PWM control device is comprised of a load, a rectifier, a PWM control module and a PWM... | 08/26/2010 |
| 20100195358 | VOLTAGE REGULATOR AND AC-DC CONVERTER A voltage regulator is provided. An input node receives an input voltage. An output node provides a supply voltage. A first transistor is coupled between the input node and a node. A first resistor is coupled between the input node and a gate of the first transistor. A ... | 08/05/2010 |
| 20100124083 | 3-PHASE POWER FACTOR CORRECTED AC TO DC FILTERED SWITCHING POWER SUPPLY This invention relates to a power supply apparatus and method for converting three-phase delta AC power to DC power using EMI filters and PFC circuits to maintain balanced AC current loading and reduce radiated and conducted emissions. Overcurrent and temperature protec... | 05/20/2010 |
| 20100118572 | LED DRIVER WITH LOW HARMONIC DISTORTION OF INPUT AC CURRENT AND METHODS OF CONTROLLING THE SAME A power supply circuit for powering a load at constant current has a rectifier stage for receiving an AC voltage input and for producing a first substantially DC voltage. A first capacitor is attached to the load. A charge-pump is attached to an output of the rectifier ... | 05/13/2010 |
| 20100091531 | METHODS AND SYSTEMS FOR REDUCING POWER CONSUMPTION Methods and systems for managing power are described. In one embodiment of a method, a DC input voltage from an AC mains to DC converter, inputted to a DC to DC converter, is adjusted lower while maintaining substantially constant DC output voltage from the DC to DC con... | 04/15/2010 |
| 20100073964 | SWITCHING CONTROL CIRCUIT AND SWITCHING POWER SUPPLY A switching element controls supply of a primary current to a transformer in a switching power supply. An amplifier circuit amplifies an output ripple of an auxiliary winding of a transformer. A fluctuation generator circuit generates a fluctuating signal, based on an o... | 03/25/2010 |
| 20100073974 | DIGITAL PEAK INPUT VOLTAGE DETECTOR FOR A POWER CONVERTER CONTROLLER An example integrated circuit controller for a power converter includes a digital peak detector and a switching block. The digital peak detector is coupled to output a digital count signal representative of a peak input voltage of the power converter. The switching bloc... | 03/25/2010 |
| 20100029109 | Multifunctional Wall Socket A multifunctional wall socket related to electrical conduction connecting device, comprising socket cover (1) with a conventional power connector (2) and a USB port (3) arranged on the socket cover. The USB port (3) is connected to the output... | 02/04/2010 |
| 20090279332 | Flyback constant voltage converter having both a PWFM mode and a PWM mode A flyback AC/DC switching converter has a constant voltage (CV) mode. The CV mode has sub-modes. In one sub-mode (“mid output power sub-mode”), the output voltage (VOUT) of the converter is regulated using both pulse width modulation and pulse frequency modulation. ... | 11/12/2009 |
| 20090279331 | Acdc converter This invention relates to an ACDC converter (1) comprising a converter input (3) and a converter output (5), a pre-regulation stage (7) and a DC transformer stage (9) comprising a transformer input stage (11) and a transformer o... | 11/12/2009 |
| 20090268492 | Switching Regulator and Electronic Device Therewith A switching regulator (20) according to the present invention includes a sense resistor (Rs), a sense current generating circuit (213) for generating a sense current (Isense) commensurate with a sense voltage (Vsense), a slope current generating circuit (<... | 10/29/2009 |
| 20090268493 | POWER-ON RESET CIRCUIT AND ELECTRONIC DEVICE USING THE SAME A power-on reset circuit connected to an external DC power source includes a delay circuit, a rectifying circuit, and a logic operation circuit. The delay circuit includes a first delay unit used for outputting a first delaying reference signal and a second delay unit u... | 10/29/2009 |
| 20090262562 | EFFICIENCY IMPROVEMENT IN POWER FACTOR CORRECTION An power converter that is operable to convert AC power into DC power that may be delivered to a load. The power converter includes a transformer and a controllable switch. The switching frequency of the power converter is configured to be dependent on the level of the ... | 10/22/2009 |
| 20090244942 | Synchronous rectification control circuit A synchronous rectification control circuit is connected with a secondary-side rectification circuit and includes a driving circuit, a dead-time acquisition circuit, and a zero-voltage detection circuit. The driving circuit includes a differentiating circuit, a first co... | 10/01/2009 |
| 20090168475 | CONVERTER POWER SUPPLY CIRCUIT AND CONVERTER POWER SUPPLY DRIVING METHOD A converter power supply circuit 100 includes SW_Q1 and SW_Q2 which switch a voltage inputted from an alternating power supply 101 via a full-wave rectifier 102 and a low-pass filter 103, by drive signals applied thereto and gen... | 07/02/2009 |
| 20090154206 | Circuit and associated method for reducing power consumption in an a power transformer A method and circuit is provided for reducing power consumption in a power transformer, typically incorporated into an electrical or electronic device such as a consumer device. In an embodiment, a detection/isolation circuit is coupled to an input of a power transforme... | 06/18/2009 |
| 20090141521 | Method and apparatus of providing synchronous regulation for offline power converter A synchronous regulation circuit is provided to improve the efficiency for an offline power converter. A secondary-side switching circuit is coupled to the output of the power converter to generate a synchronous signal and a pulse signal in response to an oscillation si... | 06/04/2009 |
| 20090129130 | POWER CONVERTER This invention relates to a power converter (1) comprising a converter input (3), a converter output (5), a power factor correction (PFC) stage (7) and an isolation stage (9). The PFC stage (7) is implemented by way of a buck PF... | 05/21/2009 |
| 20090116269 | Power supply with reduced power consumption when a load is disconnected from the power supply Detection and control circuitry are added to a conventional power supply to detect when a load, such as a portable electronic device, has been disconnected from the power supply and, when disconnected, interrupt a current path to the primary windings of a transformer wi... | 05/07/2009 |
| 20090103337 | METHOD AND APPARATUS TO REDUCE THE VOLUME REQUIRED FOR BULK CAPACITANCE IN A POWER SUPPLY A driver circuit included in a power supply having a rectifier coupled to a single phase AC input voltage is disclosed. An example driver circuit includes a drive signal generator to generate a drive signal to be coupled to a variable impedance element. A voltage sensor... | 04/23/2009 |
| 20090097289 | FEEDBACK COMMUNICATION TECHNIQUE FOR SWITCHED MODE POWER SUPPLY A power conversion circuit for a switched mode power supply (SMPS) 11 is arranged to be switchable between a normal mode of operation and a burst standby mode of operation. In an embodiment, the SMPS 11 comprises an AC/DC stage having a primary (input) sid... | 04/16/2009 |
| 20090097288 | OUTPUT POWER SWITCHING VECTOR SCALING SYSTEM AND METHOD A power converter control system and method is provided to maximize the power output of the converter where an overload condition is present. A controller calculates a command voltage and command power factor. The command voltage and command power factor are used to gen... | 04/16/2009 |
| 20090091958 | DEVICE FOR SIMULATING RECTIFIED CONSTANT IMPEDANCE LOAD AND METHOD THEREOF The device for simulating a rectified constant impedance load provide by the present invention is to test a power product and comprises an analog-digital converter, a digital signal processor, a digital-analog converter, and an active electrical load module in order to ... | 04/09/2009 |
