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US20150103563 AUTOMATIC TIMING ADJUSTMENT FOR SYNCHRONOUS RECTIFIER CIRCUIT  
A circuit includes a conduction detector configured to monitor conduction of a body diode of a synchronous rectifier switch relative to a predetermined threshold and to generate a detector output...
US20100309691 DC/DC CONVERTER WITH FULLWAVE REGULATION  
A secondary circuit for a DC/DC converter, the secondary circuit having a main outlet and an auxiliary outlet, the secondary circuit comprising a main automatically controlled synchronous...
US20140085939 High Efficiency Power Converter  
A power converter nearly losslessly delivers energy and recovers energy from capacitors associated with controlled rectifiers in a secondary winding circuit, each controlled rectifier having a...
US20140192561 CONTROL CIRCUIT FOR SWITCHING POWER CONVERTERS WITH SYNCHRONOUS RECTIFIERS  
A control circuit for switching power converters with synchronous rectifiers is disclosed for providing start-up and shut-down protection. The control circuit for switching power converters with...
US20090257250 SYNCHRONOUS RECTIFIER DC/DC CONVERTERS USING A CONTROLLED-COUPLING SENSE WINDING  
A synchronous rectifier DC/DC converter is provided. The synchronous rectifier DC/DC converter includes a power transformer, a first diode, a first MOSFET, and a first controller. The power...
US20150117068 DRIVE CIRCUIT FOR SYNCHRONOUS RECTIFIER AND METHOD THEREOF  
A power converter includes a primary side power circuit, a secondary side power circuit, and a synchronous rectifier drive circuit. The primary side power circuit includes a primary winding and a...
US20140169042 POWER SUPPLY DEVICE  
A power supply device includes a primary circuit that includes two primary windings, a secondary circuit that includes two secondary windings and a switching element for synchronous rectification,...
US20090196075 FLY-FORWARD CONVERTER POWER SUPPLY  
A fly-forward converter topology for a switched-mode power supply (SMPS) that may incorporate the advantages of both a forward converter and a flyback converter into a two-stage half-wave...
US20090175056 Synchronous Rectifier  
This invention relates to a synchronous rectifier for LLC resonant converter. This method allows simple drive method for the synchronous rectifier MOSFETS by using the transformer secondary...
US20110205763 Power Converter with an Adaptive Controller and Method of Operating the Same  
A controller for a power converter, and method of operating the same. The controller improves power converter operating efficiency by regulating an internal power converter operating...
US20080298093 MULTIPHASE RESONANT CONVERTER FOR DC-DC APPLICATIONS  
The various embodiments and example provided herein are generally directed to novel multiphase resonant converters. In an embodiment, a multiphase resonant converter comprises N unit resonant...
US20090080223 FORWARD CONVERTER WITH SELF-DRIVEN SYNCHRONOUS RECTIFIERS  
The present invention relates to a forward converter with self-driven synchronous rectifiers, which utilizes a secondary driving winding and a secondary driving circuit to drive the synchronous...
US20140140106 ADAPTIVE DEAD TIME CONTROL SCHEME FOR SWITCH MODE POWER CONVERTER WITH SYNCHRONOUS RECTIFIERS TOPOLOGY  
An adaptive dead time (ADT) control scheme for use with a switch mode power converter having a full bridge with synchronous rectifiers topology. A controller which implements the control scheme...
US20090261790 SYNCHRONOUS RECTIFIER POST REGULATOR  
Methods and apparatus for regulating a synchronous rectifier DC-to-DC converter by adjusting one or more existing synchronous rectifiers in the converter are provided. By regulating an existing...
US20090244934 SYNCHRONOUS RECTIFICATION CIRCUIT HAVING BURST MODE CONTROLLER AND CONTROLLING METHOD THEREOF  
The configuration of a synchronous rectification circuit and a controlling method thereof are provided. The proposed circuit includes a converter including a first switch and a first synchronous...
US20150138839 FORWARD CONVERTER WITH SELF-DRIVEN BJT SYNCHRONOUS RECTIFIER  
An AC-to-DC converter circuit includes DC-to-DC converter that in turn includes a secondary side circuit. The secondary side circuit includes a secondary winding, a pair of bipolar...
US20090161390 Synchronous Rectification Control Circuit Assembly  
A synchronous rectification control circuit assembly includes a first transformer, a reference voltage generator, a first PWM control signal generating circuit, a second PWM control signal...
US20050286273 Self-drive for synchronous rectifiers  
A system and method for providing the self-drive of synchronous rectifiers used in isolated power converters is provided. A transformer having a primary winding, a secondary winding and a drive...
US20110044075 POWER CONVERTER CAPABLE OF LOWERING POWER WASTAGE ON STANDBY  
A power converter includes at least one electric control switch, an electric current detecting and converting unit, a power controller, and a voltage detecting and controlling unit at the primary...
US20130279207 POWER SUPPLY DEVICE AND A SYNCHRONOUS RECTIFIER PCB  
A power supply device includes a main unit and a power switching module. The main unit includes a primary circuit board, a transformer including a primary and a secondary coil, a primary-side...
US20070297201 Magnetic interface circuit  
A magnetic interface circuit (100) includes a pair of channels (101, 102) and an absorb network (3). Each channel includes a 3-wire common mode choke (2) having a middle tap (21), and an isolation...
US20110038182 POWER CONVERTER HAVING SYNCHRONOUS RECTIFIER AND CONTROL METHOD OF SYNCHRONOUS RECTIFIER  
Disclosed is a power converter including a switching circuit; a transformer having a primary winding connected to the switching circuit and a secondary winding; a main control circuit connected to...
US20090244932 Synchronous Rectifying Apparatus and Forward Synchronous Converter  
A synchronous rectifying apparatus suitable for use in a forward synchronous converter having a transforming unit with a primary and secondary side, and a first and second rectifying switches...
US20090316442 METHOD FOR OPERATING A RESONANT POWER CONVERTER  
According to an exemplary embodiment a method of operating a resonant power supply comprises controlling the resonant power supply in a discontinuous way. According to an exemplary embodiment a...
US20110013424 FORWARD CONVERTER WITH SECONDARY SIDE POST-REGULATION AND ZERO VOLTAGE SWITCHING  
The present invention discloses a forward converter with secondary side post-regulation and zero voltage switching, where the primary side power loop may adopt a single or a dual transistor...
US20090284992 METHOD AND SYSTEMS FOR CONDUCTION MODE CONTROL  
Methods for selecting between the two modes (states) of operation, continuous conduction and discontinuous conduction, are disclosed. Systems that are capable of selecting the operating mode and...
US20090262560 Current Controlled Synchronous Rectifying Drive Circuit  
A current controlled synchronous rectifying drive circuit including a current transducer ST having a primary winding connected in series with a synchronous rectifier SR and having a secondary...
US20090091951 CONTROL CIRCUIT FOR SYNCHRONOUS RECTIFYING AND SOFT SWITCHING OF POWER CONVERTERS  
A control circuit for soft switching and synchronous rectifying is provided for power converter. A switching-signal circuit is used for generating drive signals and a pulse signal in response to a...
US20080247196 Switched Mode Power Supply With Synchronous Rectifier  
In a controller (CC2) for controlling a synchronous rectification switch (S2), the controller (CC2) comprises a sensing circuit (SRL) for sensing an output (D2) of the synchronous rectification...
US20130094251 SELF-DRIVEN SYNCHRONOUS RECTIFIER DRIVE DIRCUIT, METHOD OF OPERATION THEREOF AND POWER CONVERTER INCORPORATING THE SAME  
A drive circuit for a synchronous rectifier, a method of driving a synchronous rectifier and a power converter incorporating the drive circuit or the method. In one embodiment, the drive circuit...
US20080137379 Pulse width modulation for synchronous rectifiers in DC-DC converters  
A dc-dc converter includes a converter circuit having at least one synchronous rectifier and an active switch. A voltage compensator is connected to an output voltage of the converter circuit and...
US20090316443 AC/DC INTERMEDIATE-CIRCUIT CONVERTER HAVING A VERY WIDE AC INPUT VOLTAGE RANGE  
An AC/DC intermediate-circuit converter has a very wide AC input voltage range with a ZVS three-level DC/DC resonant converter with an LLC series-resonant circuit. Two intermediate-circuit...
US20080253149 COMPOSITE TRANSFORMER AND INSULATED SWITCHING POWER SOURCE DEVICE  
An E-shaped transformer core has a middle leg and one pair of outer legs and on opposite sides with respect to the middle leg. A first pair of coils including at least two coils are wound around...
US20090244933 HALF-BRIDGE LLC RESONANT CONVERTER WITH SELF-DRIVEN SYNCHRONOUS RECTIFIERS  
The present invention discloses a half-bridge LLC resonant converter with self-driven synchronous rectifiers, which utilizes a primary IC controller and a gate driver to drive the secondary...
US20090323375 Discontinuous Conduction Mode Control Circuit and Method for Synchronous Converter  
Circuit and method for controlling a synchronous power converter in discontinuous conduction mode with increased efficiency is disclosed. Circuitry is provided outputting gating signals to a high...
US20050024897 Synchronized rectifying controller for a forward power converter  
The present invention provides a forward power converter with a synchronized rectifying controller. The synchronized rectifying controller has a detection input for detecting the voltage of a...
US20140119063 POWER CONVERTING DEVICE AND SYNCHRONOUS RECTIFIER CONTROL CIRCUIT  
A power converting device includes a main switch, a synchronous rectifier switch, a rectifier-filter circuit which outputs an output voltage, and a synchronous rectifier control circuit which...
US20090168464 Synchronous rectifier control device and a forward synchronous rectifier circuit  
A synchronous rectifier control device comprises a status detecting unit, an analog circuit, a first counter, a second counter and a signal process unit. The status detecting unit receives at...
US20090086512 Driving a primary-side switch and a secondary-side rectifier element in a switching converter  
An apparatus, comprising a transformer comprising a first winding and a second winding; a first switch coupled to the first winding and configured to alternate between an off state and an on state...
US20110063877 Synchronous rectifying circuit with primary-side swithching current detection for offline power converters  
A synchronous rectifying circuit is provided for offline power converter. A pulse signal generator is utilized to generate a pulse signal in response to a switching current of the power...
US20150256087 Soft Switching Converter with Dual Transformer by Steering the Magnetizing Current  
A design and control method is shown to create soft transition in dual transformer half bridge or full bridge topology by controlling the magnetizing current in both transformers to cross zero...
US20100014324 OFFLINE SYNCHRONOUS RECTIFYING CIRCUIT WITH SENSE TRANSISTOR FOR RESONANT SWITCHING POWER CONVERTER  
A synchronous rectifying circuit of a resonant switching power converter is provided to improve the efficiency. The synchronous rectifying circuit includes a power transistor and a diode connected...
US20080278972 Power conversion circuit, driving method and drive unit therefor  
A power conversion circuit capable of varying an output voltage within a range from a negative voltage lower than a ground voltage to a positive voltage higher than a supply voltage, and a driving...
US20130107582 DC TO DC CONVERTOR  
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...
US20150109831 SWITCHING POWER SUPPLY DEVICE  
A drive control circuit for a switching power supply device. The drive control circuit includes an output control circuit configured to generate an output control signal with a pulse width...
US20150249395 DC to DC Converter and DC to DC Conversion System  
The present disclosure discloses a DC/DC converter and a DC/DC conversion system. The DC/DC converter includes a transformer, a primary power circuit, a secondary bridge synchronous rectifying...
US20080068868 Power MESFET Rectifier  
A rectifier MESFET includes an N-channel MESFET having its gate connected to its source, and at the same current density having a voltage drop lower than the gate Schottky diode. A Schottky diode...
US20080304291 Switched Mode Power Converter and Method of Operation Thereof  
A switched mode power converter is provided which includes a transformer (2) having a primary winding (2a) and at least one secondary winding (2b); a primary side active switch device (S1) coupled...
US20100226150 METHOD AND DEVICE FOR REGULATING A RESONANT INVERTER EQUIPPED WITH SUCH A DEVICE  
Embodiments of the present invention relate to a method and device for regulating a series resonant inverter with controlled rectification. It also relates to a resonant inverter equipped with...
US20090273951 SMART DRIVING METHOD FOR SYNCHRONOUS RECTIFIER AND ITS APPARATUS THEREOF  
The present invention discloses a smart driving method for a secondary synchronous rectifier of an isolated converter and its apparatus thereof. The apparatus comprises: a main circuit having a...

Matches 1 - 50 out of 84 1 2 >