Patent ID: 7663355
Filing Date: 2010-02-16
Classification: H02M,Y02B

Abstract:
1. A power supply apparatus comprising: an output controller that receives a control signal and that outputs an output voltage to a load; an output current detector that detects an output current flowing to the load when the output voltage is supplied from the output controller to the load and that outputs a monitoring signal corresponding to the output current; an offset circuit that produces an offset varying according to a signal fed thereto and that outputs a signal having the offset added to the monitoring signal; a comparator that compares the signal outputted from the offset circuit and having the offset added thereto with a reference potential and that outputs the control signal to the output controller; a reference voltage source that outputs a reference voltage; and a comparison circuit that compares the output voltage supplied to the load with the reference voltage and that outputs the signal to the offset circuit.