FULL-BRIDGE SYNCHRONOUS RECTIFICATION CONTROLLER

WIPO Patent Application WO/2020/114246

A1

Disclosed is a full-bridge synchronous rectification controller, in which a full-bridge synchronous rectification circuit formed by two self-driven PMOS synchronous rectifiers and two externally-driven NMOD synchronous rectifiers, and a control circuit thereof are integrated. The two self-driven synchronous rectifiers select to be turned on by transformer windings on their own, without requiring a driving circuit. The two externally-driven synchronous rectifiers generate a spike voltage at the drain after being turned on, and a synchronous rectification logic module 1 and a synchronous rectification logic module 2 may generate signals for turning off the externally-driven synchronous rectifiers after detecting the spike voltage, so a signal for turning off the externally-driven synchronous rectifiers is blocked by means of a minimum turn-on time signal, preventing the externally-driven synchronous rectifiers from being turned off immediately after being turned on. The present invention can realize that only one full-bridge synchronous rectification controller is required for a secondary side of a separately excited push-pull converter, improving the output efficiency, saving one secondary winding, improving the production efficiency, and reducing machining costs and power supply system costs.

XIAO HUA (CN)

PCT/CN2019/119575

June 11, 2020

November 20, 2019

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MORNSUN GUANGZHOU SCI & TECH (CN)

H02M3/335

CN109617430A	2019-04-12
US20180152109A1	2018-05-31
CN107251399A	2017-10-13
CN108599558A	2018-09-28
CN101297466A	2008-10-29

GUANGZHOU ZHIYOU PATENT & TRADEMARK AGENCY CO., LTD. (CN)

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