Patent ID: 7288854
Filing Date: 2007-10-30
Classification: H02J,H02M

Abstract:
1. A power supply apparatus which supplies different output voltages to a plurality of electric loads, comprising: a switching regulator which performs start and stop operations in response to a first control signal and generates a first constant voltage in response to a first voltage switching signal to output the first constant voltage to one of the plurality of electric loads; a series regulator which performs start and stop operations in response to a second control signal and generates a second constant voltage in response to a second voltage switching signal to output the second constant voltage to another one of the plurality of electric loads; and a controller which generates the first and second control signals and the first and second voltage switching signals, controls the first and second voltage switching signals such that the first constant voltage of the switching regulator is greater than the second constant voltage of the series regulator, and controls the switching regulator and the series regulator such that the first output voltage of the switching regulator is greater than the second output voltage of the series regulator using the first and second voltage switching signals during a time the switching regulator and the series regulator simultaneously operate.