Patent ID: 9337736
Filing Date: 2016-05-10
CPC Classification: G05F,H02M,Y02B

Claim Text:
1. A controller with power saving for a power converter, comprising: a delay circuit, for determining a delay time; a switching signal generation circuit, coupled to generate a switching signal which controls a power switch coupled to a transformer of the power converter for a regulation of said power converter; a detection circuit, coupled to said switching signal generation circuit, wherein whenever an output load of said power converter is lower than a light-load threshold, said switching signal is generated in a burst switching manner, and said detection circuit activates said delay circuit; and an output circuit, generating a power-saving signal to cease switching of said switching signal after said delay time ends, wherein if said output load increases while said power-saving signal is ceasing said switching of said switching signal, said switching of said switching signal is resumed, wherein said switching signal generation circuit is responsive to said output load during which said switching of said switching signal is being ceased.