公开(公告)号：US20210099093A1

公开(公告)日：2021-04-01

申请号：US17012242

申请日：2020-09-04

Applicant: Leadtrend Technology Corporation

Inventor： Chung-Wei LIN ,  Hung Ching LEE ,  Tsung Chien WU ,  Bo-Yi WU

IPC: H02M3/335 ,  H02M1/08 ,  H02M1/38

Abstract: A power supply has a transformer, a rectifier switch, a secondary-side controller and two diodes. The transformer includes a primary winding, a secondary winding, and a detection winding, inductively coupling to one another. The rectifier switch is connected in series with the secondary winding between two output power lines. The secondary-side controller is electrically coupled to two ends of the detection winding, for controlling the rectifier switch in response to two terminal signals at the two ends respectively. The two diodes are back-to-back electrically connected in series between the two ends, and a joint connecting the two diodes is electrically connected to one of the two output power lines.