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9042144 High voltage rectifier and voltage doubler using low voltage CMOS process transistors  
A high voltage full wave rectifier and doubler circuit having complementary serially connected low voltage MOSFET stacks to provide high voltage capability. The state of the MOSFETs in the MOSFET...
9042140 Bridge-less step-up switching power supply device  
A bridge-less step-up switching power supply device includes (i) a first and a second reactor having: a first and a second main winding connected to a first and a second input terminal,...
9036386 Interleaved two-stage power factor correction system  
Methods and systems are described for providing power factor correction for high-power loads using two interleaved power factor correction stages. Each power factor correction stage includes a...
9030185 Power factor correction circuit  
A power factor correction circuit includes a first series circuit, a second series circuit, a smoothing capacitor, and a reactor. The power factor correction circuit further includes an input...
9030848 DC to DC converter  
A DC to DC converter can include a reverse-blocking semiconductor switch that makes a synchronously rectifying MOSFET become parallel-connected with a capacitor that is connected to a power supply...
9024604 Power circuit  
A power circuit includes a first and a second switches between a input terminal and a reference power source; an inductor between a output terminal and a node between the first and the second...
9019735 Power factor correction circuit and method for controlling power factor correction  
A power factor correction circuit may include a boost converter circuit in which a plurality of boost circuits including a boost inductor, a rectifying diode, and a boost switch are connected with...
9001539 AC-DC resonant converter that provides high efficiency and high power density  
The disclosed embodiments provide an AC/DC power converter that converts an AC input voltage into a DC output voltage. This AC/DC power converter includes an input rectifier stage which rectifies...
9001540 Power source apparatus  
A power source apparatus includes: a first series circuit that has a first rectifier element, a first switching element, and a third rectifier element; a second series circuit that has a second...
9000601 Power semiconductor module  
The respective main electrodes of the semiconductor switching elements such as IGBTs, which are respectively mounted on the plurality of insulating boards, are electrically connected to each other...
8988909 Power conversion device  
A power conversion device includes a main circuit unit (direct-current main circuit) that converts direct-current power into alternating-current power, and a control unit that controls the...
8976558 Power supply device with smoothing capacitor and falling voltage chopper circuit  
According to one embodiment, a power supply device includes a rectifying circuit configured to rectify an alternating-current power supply, a first capacitor configured to smooth a voltage after...
8971076 Power factor correction circuit  
A first error amplification circuit amplifies a difference between a predetermined reference voltage and a first detection voltage that corresponds to the output voltage of a DC/DC converter, so...
8971044 Semiconductor device  
A semiconductor device includes: a first output unit configured to output a first phase; a second output unit configured to output a second phase different from the first phase, the second output...
8971077 Power supply circuit, mobile terminals using the same, and control method of the same  
A power supply circuit includes: a first switch and a second switch that are connected in series between an input voltage terminal and a reference power supply; a controller that controls the...
8971075 Method and apparatus for generating an adaptive switching frequency for operating power factor correction circuit  
A method of operating a power factor correction (PFC) circuit and a corresponding power factor correction circuit include determining an adaptive switching frequency of the PFC circuit related to...
8953348 Switching power supply circuit and power factor controller  
The switching power supply circuit includes a full-wave rectifier (1) which full-wave rectifies alternating power-supply voltage to output a pulsating current, and an inductor (3) connected to the...
8953342 Systems and methods for regulating power conversion systems with output detection and synchronized rectifying mechanisms  
System and method for regulating a power conversion system. A system controller for regulating a power conversion system includes a first controller terminal and a second controller terminal. The...
8953349 Systems and methods for providing AC/DC boost converters for energy harvesting  
The present invention describes systems and methods for harvesting energy from an alternating magnetic field. An exemplary embodiment can include a flux concentrator having an open core coil...
8941347 Converter control device and air conditioner including converter control device  
A converter control device comprises: a voltage-zero-cross detection unit detecting zero cross of the alternate-current voltage and outputting a voltage zero-cross signal; a power-source-current...
8942016 Power supply apparatus  
A second control circuit is configured to switch a pulse signal to a level which turns off a second switching transistor when a coil current that flows through a primary winding reaches a...
8937470 Active power factor correction circuit and related PFC controller  
An active power factor correction (PFC) circuit for calibrating a power factor of an AC-to-DC converter when the active PFC circuit is coupled with the AC-to-DC converter is disclosed including: a...
8937825 Timing controlled AC to DC converter  
A timing controlled converter for converting a time varying input signal to a regulated DC output voltage for application to a load circuit. A feedback loop is employed as a control means for...
8937826 Power converter apparatus  
A power converter apparatus for driving an electronic load is disclosed. The power converter apparatus includes a rectifier module, an active switch unit, a driving module, an input voltage...
8937463 Common-core power factor correction resonant converter  
A common-core power factor correction resonant converter includes an energy-transforming circuit. The energy-transforming circuit receives an input line voltage and generates an output power. The...
8934273 Switching power supply including power factor correction circuit with polarity determination control  
The present invention relates to a PFC switching power supply which can perform polarity determination and voltage detection of AC voltage without using a DC isolator such as a transformer....
8933674 Switch controller, switch control method, and power supply device comprising the switch controller  
The present invention relates to a switch controller, a switch control method, and a power supply including the switch controller. An exemplary embodiment of the present invention detects an...
8929110 Pulse width modulation controller architectures  
Systems, apparatuses, and techniques for pulse width modulation (PWM) are described. A described system includes a circuit that contains an inductor and a transistor that controls current through...
8917076 Off-line regulator with pass device and associated method  
An off-line regulator has a rectification circuit configured to rectify an AC line voltage into a rectified line voltage, a pass device coupled between the rectified line voltage and a first...
8913409 Self-driven AC-DC synchronous rectifier for power applications  
Systems, methods, and devices that employ self-driven gate-drive circuitry to facilitate controlling power switches to emulate a diode bridge to synchronously rectify a power signal are presented....
8908400 Voltage multiplication in a wireless receiver  
A wireless energy transfer receiver includes an input configured to receive alternating current (AC) electric energy and an output configured to make available direct current (DC) electric energy....
8902616 Active front end power converter with diagnostic and failure prevention using peak detector with decay  
Active front end power conversion systems are presented having a peak detector with adjustable decay providing a signal to an overload protection component to selectively discontinue rectifier...
8901900 Buck power factor correction system  
The invention disclosed buck power factor correction system. The system includes: a first storing device, for storing and discharging energy; a first converter device, coupled to the first storing...
8897042 Power source system and control circuit  
A power source system including power-factor modifying circuits to modify a power factor of supplied electric power, a time difference circuit to output start signals for instructing the...
8890357 Bathing system transformer device with first and second low voltage output power connections  
A line voltage transformer device for a bathing installation includes a housing structure, with a line voltage electrical power connection including a line voltage wiring cable having an...
8891264 Series circuits and devices  
Embodiments of the present invention relate to a rectifier circuit and methods of making the same for use in wireless devices (e.g., RFID tags). The present invention is drawn to a rectifier...
8891267 AC-DC converter with adaptive current supply minimising power consumption  
A circuit arrangement with standby mode minimizing power and/or current consumption having a mains AC power supply terminals and an active circuit capable of converting said mains AC power to...
8884591 Control circuit for discontinuous conduction mode power factor correction converter using harmonic modulation  
A control circuit for a discontinuous conduction mode power factor correction converter using harmonic modulation includes: a first difference circuit configured to calculate and output a...
8879286 Facility power supply with power-factor correction  
An embodiment of a power supply includes an input node, a converter stage, and an outlet. The input node is operable to receive an input AC signal having peak portions and non-peak portions. The...
8872434 Constant-current-drive LED module device  
A constant-current-drive LED module device includes a rectifier configured to receive and rectify an alternating current power source; a unidirectional LED module unit configured to connect to one...
8867239 Power supply device and method of controlling the same by using an adjustable power factor corrector  
Provided are a power supply device and a method of controlling the same. The power supply device includes: a power factor corrector which corrects a power factor of an initial power; a standby...
8861237 Power supply apparatus  
A power supply apparatus mainly includes a secondary side controller, a digital isolator, a plurality of isolation sensing units, and a driving unit. The secondary side controller is configured to...
8861230 Control circuits for power converters  
A control circuit for controlling one or more power switches of a power converter includes a voltage control loop and a current control loop. The control circuit is configured to generate a...
8861236 Switching power supply with self-optimizing efficiency  
A switching power supply is provided that includes: input terminals for the uptake of an input power, output terminals for providing an output power, a circuit disposed between the input and...
8854018 Control circuit for reducing touch current of a power converter and operation method thereof  
A control circuit for reducing touch current of a power converter includes an auxiliary pin, a zero-crossing signal generator, a feedback pin, a frequency limiting signal generator, and a gate...
8848409 Multilevel converter and a control method for operating a multilevel converter  
A converter includes an active stage for converting an AC input voltage at an AC input into an intermediate DC voltage, and a DC/DC converter for transforming the intermediate DC voltage into an...
8842447 DC power supply with low power loss  
A DC power supply (1) having a series regulator (2) for generating a fixed output DC voltage (VCC) at a variable input AC voltage (VAC) with low power loss. For this purpose, the DC power supply...
8837174 Switching power-supply apparatus including switching elements having a low threshold voltage  
In a switching power-supply apparatus, a primary-side power converter circuit includes a half bridge system and a synchronous rectifier circuit is provided as a rectifier circuit of a...
8837181 Step down switching regulator  
A current limiting comparator generates a current limiting signal SLIM which is asserted when a detection voltage Vs at a detection terminal CS is higher than a predetermined threshold voltage...
8829874 Electronic device and method for DC-DC conversion with low power mode  
The invention relates to an electronic device and a method for DC-DC-conversion. The electronic device includes energizing switch and a commutating switch coupled at a switching node. The...