Patent ID: 6791305
Filing Date: 2004-09-14
Classification: H02M,Y02B

Abstract:
A control circuit for performing digital control of a switching power supply equipped with a switching circuit block comprising:a first means that generates an output voltage digital value that indicates an actual output voltage of the switching power supply in response to a first clock signal, a second means that generates a reference voltage digital value that indicates a target value of an output voltage of the switching power supply in response to a second clock signal, a third means that compares the output voltage digital value and the reference voltage digital value and generates an error voltage digital value based thereupon, and a fourth means that reads the error voltage digital value in response to a third clock signal and controls an operation of the switching circuit block based thereupon, wherein: phases of the first clock signal and the third clock signal are substantially shifted and phases of the second clock signal and the third clock signal are substantially shifted.