Patent ID: 8054605

Claim:
A power supply controller comprising: a MOSFET disposed between a power source and a load; a current detecting element configured to output a current detection signal corresponding to a load current passing through said MOSFET; an overcurrent protective circuit configured to perform a forcing shutoff operation for said MOSFET, if a first current anomaly, in which a load current passing through said MOSFET exceeds a first threshold, is determined based on said current detection signal; a charging circuit configured to turn on said MOSFET based on an external ON signal by applying a charging current to a gate of said MOSFET, said charging circuit being capable of changing a charge rate thereof; and a control circuit configured to increase the charge rate of said charging circuit if a second current anomaly, in which a load current passing through said MOSFET exceeds a second threshold lower than said first threshold, is determined based on said current detection signal, so that the charge rate is higher than that when said load current is equal to or lower than said second threshold.