Patent ID: 6384584
Filing Date: 2002-05-07
Classification: G05F

Abstract:
A current control circuit comprising:a pair of input terminals for connecting a DC power source which outputs a prescribed output voltage, a pair of output terminals for connecting a load, a first resistor, one end of which is connected to one of said input terminals, a PNP transistor, for detecting an overcurrent flowing to said load, having an emitter connected to an one end of said first resistor and a base connected to the other end of said first resistor, a PMOS transistor, for controlling connection and disconnection between said DC power source and said load, having a source connected to the other end of said first resistor and a drain connected to one of said output terminals, a time constant circuit comprising a second resistor and a capacitor which are provided between a collector of said PNP transistor and the ground, and a hysteresis comparator, to which a voltage obtained by said time constant circuit is applied, for controlling a gate of said PMOS transistor.