Overcurrent interrupting device

摘要

An overcurrent interrupting device includes a power MOSFET (10) for controlling an electric current flowing from a power supply to a load; a current detection circuit (30) for detecting a current value of an electric current flowing from the power MOSFET (10) to a load (L); a determination value selection circuit (50) for selecting a determination value used for determining an overcurrent; an overcurrent determination circuit (40) for determining whether or not the current value represents occurrence of an overcurrent, on the basis of the current value detected by the current detection circuit (30) and the determination value selected by the determination value selection circuit (50); and a boosting and switching circuit (20) for controlling activation/deactivation of the power MOSFET (10) on the basis of a result of determination rendered by the overcurrent determination circuit (40).