公开(公告)号：US11264890B2

公开(公告)日：2022-03-01

申请号：US16859848

申请日：2020-04-27

Applicant: PANASONIC CORPORATION

Inventor： Takuya Ishii ,  Tetsuya Mihashi ,  Ginga Katase ,  Takashi Ryu

IPC: H02M1/32 ,  H02H7/20 ,  H02H3/20 ,  H02H1/00 ,  H02H9/02 ,  H02H3/08 ,  G05F1/10

Abstract: A power supply protection circuit is a circuit that controls a protection switch provided on a power supply line connecting a direct current power supply and a load circuit. The power supply protection circuit includes: circuitry connected to the protection switch; and a controller that switches an operation state of the circuitry between a first state and a second state. The first state is an operation state in which driving of the protection switch is enabled when the protection switch is a first semiconductor switch having a control terminal connected to a semiconductor layer of a first conductivity type. The second state is an operation state in which driving of the protection switch is enabled when the protection switch is a second semiconductor switch having a control terminal connected to a semiconductor layer of a second conductivity type that is different from the semiconductor layer of a first conductivity type.