Match Document Document Title
US20130107584 Dynamic Mosfet Gate Drivers  
The embodiments herein describe a dynamic metal-oxide-semiconductor field-effect transistor (MOSFET) gate driver system architecture and control scheme. The MOSFET gate driver system dynamically...
US20130100713 SWITCHING POWER CONVERSION CIRCUIT AND POWER SUPPLY USING SAME  
A switching power conversion circuit having a two-stage power circuit topology and capable of performing power factor correction is disclosed. In a case that the electrical energy of the switching...
US20120268039 Switching power supply with power feedback to keep lamp's brightness constant  
A power supply and methods are provided. In one implementation, the power supply includes a switching converter with power feedback circuit to output constant power to keep lamp at constant...
US20110122658 POWER CONVERTER USING ENERGY STORED IN LEAKAGE INDUCTANCE OF TRANSFORMER TO POWER SWITCH CONTROLLER  
The power converter includes a transformer that is coupled or decoupled from a power source by a switch controlled by a switch controller. The transformer includes a first primary winding coupled...
US20150124499 ACTIVE DAMPER AND POWER SUPPLY INCLUDING THE SAME  
An active damper and a power supply according to exemplary embodiments include: a damper resistor coupled to an input voltage; a damper switch coupled in parallel with the damper resistor; and a...
US20130258722 PHASE-CUT PRE-REGULATOR AND POWER SUPPLY COMPRISING THE SAME  
A power supply includes a phase-cut pre-regulator. The phase-cut pre-regulator comprises a switching device connected between a line voltage and an input voltage of a bulk capacitor and a...
US20110267848 POWER CONVERTER  
Reduction of power loss and operation in a two-phase mode are made possible. The power converter of present invention is a power converter composed of a core formed by a magnetic material and a...
US20110157923 CIRCUITS AND METHODS FOR CONTROLLING POWER CONVERTERS INCLUDING TRANSFORMERS  
A power converter includes a transformer operated in multiple switching cycles. At least one switching cycle includes a charging period, a discharging period, and an adjusting period. The...
US20110149613 FLYBACK CONVERTER UTILIZING BOOST INDUCTOR BETWEEN AC SOURCE AND BRIDGE RECTIFIER  
A flyback converter utilizes a boost inductor coupled between a source of AC power and a bridge rectifier to provide power factor correction. A primary winding of the flyback transformer is...
US20140362609 POWER SUPPLY DEVICE  
A power adaptor to supply power for a portable device has an input circuit (21) for receiving mains input power, a power switch device (25), a power inductance (24) and an output circuit (22)...
US20140016371 Magnetic Device and Power Converter Employing the Same  
A magnetic device and power converter employing the same. In one embodiment, the magnetic device includes a first L-core segment including a first leg and a second leg extending therefrom, and an...
US20140016370 Magnetic Device and Power Converter Employing the Same  
A magnetic device and power converter employing the same. In one embodiment, the magnetic device includes a first L-core segment including a first leg and a second leg extending therefrom, and an...
US20140016369 Magnetic Device and Power Converter Employing the Same  
A magnetic device and power converter employing the same. In one embodiment, the magnetic device includes a first L-core segment including a first leg and a second leg extending therefrom, and an...
US20140016368 Magnetic Device and Power Converter Employing the Same  
A magnetic device and power converter employing the same. In one embodiment, the magnetic device includes a first L-core segment including a first leg and a second leg extending therefrom, and an...
US20140016367 Magnetic Device and Power Converter Employing the Same  
A magnetic device and power converter employing the same. In one embodiment, the magnetic device includes a first L-core segment including a first leg and a second leg extending therefrom, and an...
US20140071716 High efficient single switch single stage power factor correction power supply  
A single switch PFC power supply (including forward and fly-back power supply) in single stage has two transformers: one forward transformer, one main transformer. The main transformer transfers...
US20140169043 BIAS VOLTAGE GENERATING CIRCUIT AND SWITCHING POWER SUPPLY THEREOF  
Disclosed herein are bias voltage generating circuits configured for switching power supplies, and associated control methods. In one embodiment, a bias voltage generating circuit can include: (i)...
US20140346874 Power Supply with Standby Operation  
A power supply includes a power conversion circuit configured to selectively operate in one of an active mode in which output power is supplied to a load and a standby mode in which output power...
US20120170328 Multimodal LED Power Supply With Wide Compliance Voltage and Safety Controlled Output  
A power supply for a non-linear load such as a light emitting diode load uses a voltage dynamic of a fly-back topology to correct for a rippling of an unfiltered rectified line voltage. Efficiency...
US20120250364 FLYBACK CONVERTER WITH FORWARD CONVERTER RESET CLAMP  
A power supply includes a first power converter having a first transformer coupled to an input of the power supply and to a first output of the power supply. A clamp reset circuit is coupled to...
US20120176820 Switching Power Converter Having Optimal Dynamic Load Response with Ultra-Low No Load Power Consumption  
A switch controller is disclosed that adaptively controls the operating frequency of a switching power converter in order to improve one-time load response and repetitive dynamic load responses....
US20140233270 VOLTAGE CONVERSION AND CHARGING FROM LOW BIPOLAR INPUT VOLTAGE  
A circuit includes a transformer configured with a primary winding and a secondary winding that are driven from a voltage supplied by a thermoelectric generator (TEG). The circuit includes a...
US20120026757 CONVERTER CONTROLLER  
Provided is a converter controller capable of preventing destruction of an element such as an auxiliary switch by preventing operation interference between auxiliary circuits of respective phases...
US20140265594 Mother/Daughterboard Power Supply  
Circuits are described that permit the efficient supply of power from a backplane such as that contained in a motherboard. In one embodiment, the power supply stores charge at a relatively high...
US20120176821 Startup Circuit and Input Capacitor Balancing Circuit  
In one embodiment, an input capacitor balancing circuit for a power supply is provided. The circuit includes an input capacitance operable to filter input power for the power supply. The input...
US20110096572 LOW POWER CONSUMPTION START-UP CIRCUIT WITH DYNAMIC SWITCHING  
A start-up circuit in a switch-mode power converter that employs a Zener diode to provide a reference voltage to reduce the power consumption and the size of the start-up circuit. The start-up...
US20130194835 FLYBACK CONVERTER WITH FORWARD CONVERTER RESET CLAMP  
A power supply includes a forward converter having a first transformer coupled to an input of the power supply and to a first voltage output. The power supply also includes a separate flyback...
US20120114009 FORWARD-FLYBACK POWER SUPPLY USING AN INDUCTOR IN THE TRANSFORMER PRIMARY AND METHOD OF USING SAME  
A power supply (300) includes a rectification means (303) for providing a voltage from an AC mains input (301). An inverter (307) is used for supplying a switched AC voltage at high frequency from...
US20130343099 ACTIVE DAMPING CIRCUIT, ACTIVE DAMPING METHOD, POWER SUPPLY DEVICE COMPRISING THE ACTIVE DAMPING CIRCUIT  
An active damping circuit according to an exemplary embodiment of the present invention is applied to a power supply using an input voltage that is generated by rectifying an AC input passed...
US20110222319 SWITCHING POWER SUPPLY  
A switching power supply includes a first auxiliary power supply for causing a first auxiliary winding of a transformer to induce voltage by ON/OFF control of a switching element connected to a...
US20150092455 INTEGRATED MAGNETIC CIRCUIT AND METHOD OF REDUCING MAGNETIC DENSITY BY SHIFTING PHASE  
Disclosed herein are an AC-DC converter in which an inductor of boost PFC and a flyback transformer are integrated in one and a method of preventing a magnetic density from being saturated by...
US20110058396 FLYBACK-TYPE INVERTER CIRCUIT FOR NETWORK SUPPLY OR FOR NETWORK-INDEPENDENT OPERATION  
An inverter circuit for supplying solar power or wind power to a network or for network-independent operation. The inverter circuit includes a minimum number of components and can therefore be...
US20150230300 Dual Switcher Flyback Structure for LED Driver  
Driver circuits to reduce or remove flicker of SSL devices are presented. A controller for a power converter which converts electrical power at an input voltage into electrical power at an output...
US20150062976 SWITCHED-MODE POWER SUPPLY WITH MODULAR ARCHITECTURE  
The disclosure concerns a switched-mode power supply comprising a module for charging and discharging an energy store including an electrical transformer. The device provides high configuration...
US20130343098 Power Converters And Methods For Active Leakage Energy Recovery In A Power Converter  
Power converters and methods of recovering leakage energy in power converters are disclosed. In one embodiment, a power converter assembly includes an input for receiving a direct current (DC)...
US20120243268 Transformers and Methods For Constructing Transformers  
Transformers and methods of constructing transformers are disclosed. In one embodiment, a method of constructing a transformer includes wrapping a first primary winding around a core, wrapping a...
US20110182088 QUASI-RESONANT POWER SUPPLY CONTROLLER AND METHOD THEREFOR  
In one embodiment, a quasi-resonant power supply controller is configured to select particular valley values of a switch voltage to determine a time to enable a power switch. The valleys values...
US20110103101 INTEGRATED CONTROL CIRCUIT FOR CONTROLLING A SWITCHING POWER SUPPLY, SWITCHING POWER SUPPLY INCORPORATING THE SAME, AND A METHOD OF CONTROLLING A SWITCHING POWER SUPPLY  
An integrated control circuit for controlling a switching power supply, a switching power supply incorporating the same, and a method of controlling the switching power supply, where the control...
US20140211518 LOW TOTAL HARMONIC DISTORTION AND HIGH POWER FACTOR CORRECTION POWER CONVERTERS  
A controller circuit for the control of a power converter is disclosed. An example controller circuit generates a waveform that drives a switch that controls the power converter. The controller...
US20130181635 LED Driver with Primary Side Sensing  
The disclosed switching regulator, including a controller for a switching regulator, is adaptable to supplying, or controlling the supply of, regulated current to a load that is isolated from a...
US20150162823 PFC CIRCUITS WITH VERY LOW THD  
A boost chopper circuit is described that an alternating current (AC) power source; at least one inductor connected to said AC power source; a rectifier connected to said inductor and AC power...
US20140185334 SWITCHING POWER SUPPLY  
Aspects of the invention provide a switching power supply in which frequency reduction control in a light load condition both in a power factor correction converter and a DC-DC converter restrains...
US20120224400 ELECTRICAL EQUIPMENT  
A television includes a power supply circuit including a transformer that converts input voltage to output voltage, an input voltage monitoring circuit that monitors the input voltage based on a...
US20140036549 Switching Power Converter Dynamic Load Detection  
A secondary-side dynamic load detection system and method rapidly identifies when a dynamic load has been placed on the output (e.g., when an electronic device is re-connected to the switching...
US20140268912 NO LOAD DETECTION AND SLEW RATE COMPENSATION  
The power regulation control circuit is implemented during two modes. A first mode is a sleep mode and a second mode is a wake-up mode. During the sleep mode, the power supply detects a no-load...
US20130235621 REGULATION FOR POWER SUPPLY MODE TRANSITION TO LOW-LOAD OPERATION  
A switching power converter includes a controller configured to transition from a first operating mode to a second operating mode by determining the operating conditions at the transition point...
US20140085940 Power System Switch Protection Using Output Driver Regulation  
A controller of a switching power converter includes a voltage protection circuit that generates a modified supply voltage that does not exceed a predetermined threshold voltage to power one or...
US20140218977 SWITCHING POWER SUPPLY CIRCUIT  
A switching power supply circuit includes a switching element that switches power fed to a primary winding of a transformer and thus induces a voltage in the secondary winding, and an oscillation...
US20080304293 Converter controller  
A converter controller is disclosed. In one embodiment, a controller for a flyback converter includes a converter and a flyback controller. The converter is coupled to the flyback converter for...
US20150131340 POWER SUPPLY DEVICE  
A power supply device may include a transformer having a primary winding receiving a rectified alternating current (AC) input power and a secondary winding electromagnetically coupled to the...