OVERCURRENT PROTECTION CIRCUIT

摘要

Provided is an overcurrent protection circuit that can cope even with a case where a ground fault occurs in a mask time period for overcurrent detection. The overcurrent protection circuit detects, when a switching element 7 is on, a differential voltage value between both ends of the switching element 7 that is caused by an electric current flowing therethrough, and turns off the switching element 7 when the detected differential voltage value is larger than a predetermined voltage value. A detection circuit 14 that detects respective voltage values at both ends of the switching element 7, and means 14 for preventing the switching element 7 from being turned on if either of the respective voltage values detected by the detection circuit 14 is less than a predetermined value.