公开(公告)号：US20240175922A1

公开(公告)日：2024-05-30

申请号：US18272432

申请日：2022-01-12

申请人： Rohm Co., Ltd.

发明人： Ryosuke SUMII ,  Katsuhiro OSHIKAWA ,  Takayuki MATSUURA

IPC分类号： G01R31/3187 ,  G01R31/28 ,  G01R31/319 ,  G01R31/3193

CPC分类号： G01R31/3187 ,  G01R31/2856 ,  G01R31/2879 ,  G01R31/31901 ,  G01R31/31932

摘要： A self-diagnosis circuit (BST1) configured to diagnose a fault detection circuit (20) including a first comparator (CMP1) configured to be fed with a voltage based on a fault sensing target voltage (Vo1) and a first reference voltage (Vref1) includes a voltage switch circuit (50) configured to switch the level of a voltage based on a second reference voltage (Vref2) and output the resulting voltage, a first path switch circuit (51) configured to switch between a path through which the voltage output from the voltage switch circuit is fed to the first comparator and a path through which the voltage based on the fault sensing target voltage is fed to the first comparator, and a control circuit (15) configured to control the voltage switch circuit and the path switch circuit.