Patent ID: 8040649

Claim:
An overcurrent protection apparatus comprising: a plurality of overcurrent protection circuits connected in series, for protecting each of a plurality of series regulators from overcurrent, the plurality of overcurrent protection circuits each being disposed for each of the plurality of series regulators, wherein the overcurrent protection circuit intercepts a current flowing from an input side to an output side of the series regulator of a protection object according to a magnitude of the current flowing through the series regulator of the protection object disposed for the overcurrent protection circuit, and when the magnitude of the current flowing through the series regulator of the protection object is smaller than the magnitude of the current flowing through the overcurrent protection circuit disposed for an upstream series regulator of two series regulators connected adjacently to each other, the overcurrent protection circuit disposed for a downstream series regulator of the two series regulators intercepts the current flowing from the input side to the output side of the series regulator of the protection object.