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Synchronous Rectifier

Synchronous Rectifier-related patent applications - as published by the U.S. Patent and Trademark Office (USPTO).


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Efficient power supply voltage regulation for synchronous rectifier controller
Dialog Semiconductor Inc.
August 09, 2018 - N°20180226897

A flyback converter is provided with a synchronous rectifier (sr) controller including a pulse linear regulator (plr) charging path and an ldo charging path. The sr controller is configured to monitor the switching period and/or duty cycle of a power switch in the flyback converter to select between the plr and ldo charging paths..
Flyback power converter circuit and secondary side controller circuit thereof
Richtek Technology Corporation
July 26, 2018 - N°20180212528

A flyback power converter circuit converting an input voltage to an output voltage includes a transformer, a power switch, a synchronous rectifier (sr) switch, and a secondary side control circuit. The secondary side control circuit controls the sr switch to be on when the power switch is off.
Synchronous rectifier control with adaptive minimum off-time
Dialog Semiconductor Inc.
July 26, 2018 - N°20180212527

A switching power converter may include a power switch coupled to a primary winding of a transformer, and a primary controller configured to turn on and off the power switch, a synchronous rectifier switch coupled to a secondary winding of a transformer, and a synchronous rectifier controller configured to turn on and off the synchronous rectifier switch. The synchronous rectifier ...
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Apparatuses, methods, and systems for circuitry using synchronous rectifiers
Intel Corporation
July 05, 2018 - N°20180191267

Embodiments include apparatuses, methods, and systems for an alternating current (ac) to direct current (dc) converter including a synchronous rectifier to convert an ac input signal to a dc output signal. The ac to dc converter may further include a feedback circuit coupled to an output terminal of the synchronous rectifier to sample the dc output signal and to generate ...
Sense resistor short detection for synchronous rectifier
Dialog Semiconductor Inc.
July 05, 2018 - N°20180191254

Systems, devices, and methods are provided to enable power converters to use two or more sensing elements to reliably detect a short circuit (or soft-short circuit) existing in the power converter and distinguish these conditions from other operating conditions, such as low voltage conditions or normal operating conditions. The disclosed embodiments enable the accurate detection of fault conditions, such as ...
Adaptive synchronous switching in a resonant converter
Nexgen Power Systems, Inc.
June 14, 2018 - N°20180166997

An embodiment of a resonant converter includes having resonant circuitry having inductive and capacitive elements configured to create electrical resonance when an input voltage is applied and a synchronous rectifier coupled between at least a portion of the resonant circuitry and an output of the resonant converter. The synchronous rectifier includes a diode, and an electrical switch.
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Controller for multi-output single magnetic component converter with independent regulation of constant current and constant ...
Power Integrations, Inc.
June 07, 2018 - N°20180159434

A power converter includes a primary winding and multiple output windings to provide multiple independently controlled and regulated outputs with a common return line. The outputs are coupled to independently regulate constant current, constant voltage, or both constant current and constant voltage outputs.
Adaptive synchronous rectifier timing for resonant dc/dc converters
Infineon Technologies Austria Ag
May 31, 2018 - N°20180152111

A resonant or semi-resonant dc/dc converter makes use of one or more synchronous rectification (sr) switches for rectifying an output current that is provided to a load of the converter. The sr switches are ideally turned off when zero current is flowing through them.
Wireless power receiver with a synchronous rectifier
Energous Corporation
May 03, 2018 - N°20180123400

Embodiments disclosed herein describe a wireless power receiver including a synchronous rectifier using a class-e or a class-f amplifier. The voltage waveform generated from a power source, for example an antenna, is tapped to create a feed-forward tap-line to provide a gate voltage to the transistor of the class-e or the class-f amplifier.
Resonant rectifier circuit with capacitor sensing
Texas Instruments Incorporated
March 29, 2018 - N°20180090993

A wireless power transfer system using a resonant rectifier circuit with capacitor sensing. A wireless power transfer system includes a power receiver resonant circuit and a synchronous rectifier.
Regulation circuit associated with synchronous rectifier providing cable compensation for the power converter and method ...
Semiconductor Components Industries, Llc
March 15, 2018 - N°20180074537

A regulation circuit of a power converter for cable compensation according to the present invention comprises a signal generator generating a compensation signal in accordance with a synchronous rectifying signal. An error amplifier has a reference signal for generating a feedback signal in accordance with an output voltage of the power converter.
Efficient power supply voltage regulation for synchronous rectifier controller
Dialog Semiconductor Inc.
March 01, 2018 - N°20180062530

A flyback converter is provided with a synchronous rectifier (sr) controller including a pulse linear regulator (plr) charging path and an ldo charging path. The sr controller is configured to monitor the switching period and/or duty cycle of a power switch in the flyback converter to select between the plr and ldo charging paths..
Method and apparatus for synchronous rectifier
Semiconductor Components Industries, Llc
February 22, 2018 - N°20180054132

A synchronous rectifier controller includes an exception timer, one or more blanking timers, and control logic. The control logic may detect a beginning of a conduction phase using a current sense signal.
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Power converter and control method therefor
Semiconductor Components Industries, Llc
December 28, 2017 - N°20170373607

A power converter and a control method therefor are provided. The power converter includes a transformer, synchronous rectifier and a control circuit.
Communication circuit for flyback power converter with synchronous rectifier
Semiconductor Components Industries, Llc
December 28, 2017 - N°20170373606

A method for communicating with a power converter comprises initiating a communication sequence by sensing a first distortion of a sensed waveform during a discharge period of a first power transfer cycle of the power converter. The sensed waveform is proportional to a secondary current of the power converter.
Dynamic sharing average current mode control for active-reset and self-driven synchronous rectification for power converters
Crane Electronics, Inc.
December 14, 2017 - N°20170358979

A circuit for providing dynamic output current sharing using average current mode control for active-reset and self-driven synchronous rectification with pre-bias startup and redundancy capabilities for power converters. The circuit communicates a secondary side feedback signal to a primary side via a bidirectional magnetic communicator that also provides a secondary voltage supply.
System for synchronous rectifier voltage regulator shoot-through detection
Dell Products, Lp
December 14, 2017 - N°20170357309

A method, circuit, and information handling system detect an assertion of a low side gate driver signal of a low side gate driver coupled to a low side gate of a low side selectively conductive device, to obtain a reference voltage value, to detect a local high side positive supply voltage at a high side positive supply voltage terminal of ...
Switching control circuit with signal process to accommodate the synchronous rectifier of power converters
Semiconductor Components Industries, Llc
November 23, 2017 - N°20170338749

A switching control circuit of a power converter according to the present invention comprises an input circuit and a clock generator. The input circuit is coupled to receive a feedback signal for generating a switching signal.
Synchronous rectifier
November 02, 2017 - N°20170317602

Disclosed is a method to control the synchronous rectification in a power converter including a primary winding and a secondary winding, including detecting a peak current in a secondary winding, determining a blanking threshold based on the peak current, and blanking a turning off of a synchronous rectifier (sr) switch for a blanking time based on the blanking threshold.. .
Digitalized double-excitation uninterrupted switching power supply
November 02, 2017 - N°20170317524

A digitalized double-excitation uninterrupted switching power supply comprises a main transformer provided with a primary coil and a secondary coil, a main loop, a synchronous rectification output loop, a synchronous direct-current converter and a digital control unit, wherein the main loop comprises a high-voltage switching network, a resonant inductor, the primary coil and a resonant capacitor. The synchronous rectification output ...
Self supply for synchronous rectifiers
Infineon Technologies Austria Ag
October 26, 2017 - N°20170310230

A power converter with an isolated topology may include a primary side and a secondary side. The secondary side includes a self-powered synchronous rectifier.
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