Patent ID: 6984966
Filing Date: 2006-01-10
Classification: H02M,Y02B

Abstract:
1. A switching power supply provided with a control switch, a synchronous switch and a series connection of an output inductor and a smoothing capacitor, wherein the input of an error amplifier is connected to the output of a power supply circuit to amplify the error between detected voltage and reference voltage, the output of said amplifier is connected an input of a first comparator and an input of a second comparator through split resistors, a filter circuit comprising resistors and a capacitor is connected in parallel to said synchronous switch, and the output of said filter circuit is connected to another input of said first comparator and another input of said second comparator, wherein a control means is configured to control the amplitude of the triangular waveform obtained through said filter circuit to be between an input level of said first comparator and an input level of said second comparator.