Patent ID: 7848073

Claim:
A power supply controller, comprising: a switching element that is disposed between a power source and a load, the load being an inductive load; a current detecting element that is connected in parallel to the switching element and outputs a detection signal corresponding to a load current that flows to the switching element; a voltage generator circuit that generates a generation voltage that corresponds to an output voltage across the load; an anomaly detecting circuit that, when a voltage corresponding to the detection signal exceeds the generation voltage, outputs an abnormal signal; a protection circuit that performs a predetermined protection operation based on the abnormal signal that is outputted from the anomaly detecting circuit, the protection circuit forcing the switching element to shut off and be kept in a shutoff state for a predetermined reference shutoff time period, as the predetermined protection operation; a control circuit into which an on signal and an off signal are inputted, and which turns on the switching element based on input of the on signal and turns off the switching element based on input of the off signal; and a blocking circuit that blocks execution of the predetermined protection operation by the protection circuit when the off signal is inputted and the voltage corresponding to the detection signal exceeds the generation voltage.