公开(公告)号：US20220308612A1

公开(公告)日：2022-09-29

申请号：US17655854

申请日：2022-03-22

Applicant: ROHM Co., LTD.

Inventor： Kenji MURAOKA ,  Toru TAKUMA

IPC: G05F1/573 ,  H03K19/003 ,  H02H3/08 ,  H03K17/081 ,  B60R16/02

Abstract: Provided is an overcurrent protection circuit including an overcurrent detection unit configured to compare an output current flowing through a switch element and a predetermined overcurrent detection value to generate an overcurrent detection signal, an output activation detection unit configured to compare an output voltage and a predetermined threshold voltage to generate an output activation detection signal, a logic unit configured to combine the overcurrent detection signal and the output activation detection signal to generate a logic operation signal, and a diagnostic output unit configured to provide diagnostic output, the logic unit shifting the logic operation signal to a logic level of abnormal state when the overcurrent detection signal is shifted to a logic level of overcurrent detection state and holding the logic operation signal at that logic level, unless the output activation detection signal is shifted to a logic level of output activation state.