TOTEM-POLE BRIDGELESS CIRCUIT, SURGE PROTECTION METHOD THEREOF AND POWER SUPPLY MODULE

WIPO Patent Application WO/2024/088139

A1

A totem-pole bridgeless circuit. The circuit comprises a slow bridge arm unit (110) and a fast bridge arm unit (120) which are connected in parallel; an alternating-current input unit (130) connected between the midpoint of two switching transistors in the slow bridge arm unit (110) and the midpoint of two switching transistors in the fast bridge arm unit (120); a current sampling unit (140); and a surge protection unit (150). The current sampling unit (140) comprises sampling resistors respectively connected in series with the two switching transistors in the slow bridge arm unit (110). When the current sampling unit (140) collects a surge current, the circuit can control, by means of the surge protection unit (150), a first slow switching transistor (SR1), a second slow switching transistor (SR2), a first fast switching transistor (Q1) and a second fast switching transistor (Q2) to be disconnected, thereby realizing surge protection of the totem-pole bridgeless circuit. The totem-pole bridgeless circuit has a simple circuit structure and a fast response speed. Also disclosed are a totem-pole bridgeless circuit surge protection method and a power supply module.

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XIE RENJIAN (CN)
LIU XIANG (CN)

PCT/CN2023/125272

May 02, 2024

October 18, 2023

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HYNETEK SEMICONDUCTOR CO LTD (CN)

H02M7/219

CN115580161A	2023-01-06
CN103368371A	2013-10-23
CN109004850A	2018-12-14
CN105871244A	2016-08-17
CN111856116A	2020-10-30
CN102576057A	2012-07-11
JP2014042433A	2014-03-06

LIUJIA CHINA IP LAW OFFICE (CN)

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