公开(公告)号：US20240313765A1

公开(公告)日：2024-09-19

申请号：US18571215

申请日：2022-06-23

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： HIROKI AKASHI ,  YOHSUKE MITANI ,  YUTA NAGATOMI ,  MASAFUMI NAKAMURA ,  MASATOSHI NAKASE ,  KINYA KATO ,  YASUHIRO IIJIMA

IPC: H03K17/30 ,  H03K17/06 ,  H03K17/081

CPC classification number: H03K17/302 ,  H03K17/063 ,  H03K17/08104 ,  H03K2217/0081

Abstract: In a backup power supply system according to the present invention, in a non-defective state in which a main power supply is not defective, a controller turns on a first field-effect transistor and causes a third field-effect transistor to operate in an active region so as to charge the power storage device from the main power supply via a charging path through the first field-effect transistor, the second field-effect transistor, and the third field-effect transistor. In a defective state in which the main power supply is defective, the controller turns off the first field-effect transistor and turns on the second field-effect transistor and the third field-effect transistor so as to supply power from the power storage device to the load.