公开(公告)号：US12224659B2

公开(公告)日：2025-02-11

申请号：US18102784

申请日：2023-01-30

Applicant: FSP TECHNOLOGY INC.

Inventor： Che-Min Lin ,  Kuo-Chieh Chan ,  Kuan-Jung Lee ,  Chi-Chang Lien ,  Ching-Chia Chu

IPC: H02J7/00 ,  H02M1/32 ,  H02M3/335

Abstract: A charging device and a safety function control circuit and method thereof are provided. When a charging device is not connected to a load, a converted voltage value of a power connection terminal of the charging device is kept to be lower than a safe voltage value so as to maintain a safe mode. The safety function control circuit includes a first control module and a second control module for constant voltage control. The first control module and the second control module perform matching control on a power conversion circuit of the charging device, and in case of a single fault of one of the control modules, the other module is still capable of keeping the converted voltage value to be less than the safe voltage value. Thus, it is ensured that the safe mode stays functional in case of a concurrency of both a single hardware fault and a single firmware fault.