公开(公告)号：US10778086B1

公开(公告)日：2020-09-15

申请号：US16440499

申请日：2019-06-13

Applicant: QUANTA COMPUTER INC.

Inventor： Yu-Shin Liao ,  Kuo-Chan Hsu ,  Yun-Teng Shih ,  Cheng-Hung Yu

IPC: H02M1/36 ,  H02M1/08 ,  H02M1/00

Abstract: A power source switching circuit for powering an electronic component includes a soft-start circuit, a first input connected to a standby power source, a second input connected to a main power source, and an output. The output provides a voltage to the electronic component and is configured to be alternatively electrically connected to the first input or the second input. When the power source switching circuit is in a standby mode, the output is connected to the first input and the standby power source. When the power source switching circuit is in a main mode, the output is connected to the second input and the main power source. When the power source switching circuit is initially activated to the standby mode, the soft-start circuit is enabled. When the power source switching circuit subsequently switched from the main mode to the standby mode, the soft-start circuit is disabled.