SWITCHED-MODE POWER SUPPLY SECONDARY-SIDE SYNCHRONOUS RECTIFIER CONTROLLER, AND SWITCHED-MODE POWER SUPPLY

WIPO Patent Application WO/2023/005758

A1

Disclosed in embodiments of the present application are a switched-mode power supply secondary-side synchronous rectifier controller, and a switched-mode power supply. The synchronous rectifier controller comprises: a demagnetization detection circuit, a standby determination circuit, an AND gate circuit, and a drive circuit. An input terminal of the demagnetization detection circuit is connected to one end of a synchronous rectification MOS Q2 of the switched-mode power supply. One output terminal of the demagnetization detection circuit is connected to one input terminal of the AND gate circuit, and the other output terminal of the demagnetization detection circuit is connected to an input terminal of the standby determination circuit. An output terminal of the standby determination circuit is connected to the other input terminal of the AND gate circuit. An output terminal of the AND gate circuit is connected to an input terminal of the drive circuit. An output terminal of the drive circuit is connected to a gate of the MOS Q2. The technical solution of the present application has the advantage of improving the system efficiency.

ZHANG DONGTIAN (CN)

PCT/CN2022/106694

February 02, 2023

July 20, 2022

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SHENZHEN INJOINIC TECH CO LTD (CN)

H02M3/335

CN113315383A	2021-08-27
CN102882377A	2013-01-16
CN103236795A	2013-08-07
CN105991034A	2016-10-05
CN103728572A	2014-04-16
CN107342691A	2017-11-10
CN209134310U	2019-07-19

SCIHEAD IP LAW FIRM (CN)

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