公开(公告)号：US20230155497A1

公开(公告)日：2023-05-18

申请号：US18050060

申请日：2022-10-27

Applicant: CHROMA ATE INC.

Inventor： Chen Yuan WU ,  Chih Hsien WANG ,  Kuo Cheng WANG ,  Cheng Chung LEE

IPC: H02M3/139 ,  H02M3/158 ,  H02M3/157 ,  H02M1/00

CPC classification number: H02M3/139 ,  H02M1/0025 ,  H02M3/157 ,  H02M3/1582

Abstract: The present invention relates to an AC/DC power conversion module and a method of driving the same. When an AC/DC converter is electrically coupled to an external power source, a microprocessor is electrically energized by a buck auxiliary circuit, under control of the microprocessor, a DC/DC converter is activated for a certain time period, and then, the AC/DC converter is activated. Thereafter, an output voltage of the AC/DC converter is boosted, and an output voltage of the DC/DC converter is boosted accordingly. Power elements in the downstream side DC/DC converter are activated first, and then power elements in the upstream side AC/DC converter are activated, thereby an inrush current is suppressed. Once the external power source is connected, the buck auxiliary circuit will automatically reduce a voltage of the power input to activate the module. It realizes that the module will autonomously operate after being electrically energized.