Patent ID: 7800923
Filing Date: 2010-09-21
Classification: H02M,Y02B

Abstract:
1. An offline synchronous regulator, comprising: a plurality of switches, coupled to switch a primary winding of a transformer and generating a switching signal in a secondary winding of said transformer; a switching circuit, coupled to said transformer and an output of said offline synchronous regulator to generate pulse signals in response to said switching signal and a feedback signal; and a synchronous switch, having a power-switch set and a control circuit, said power-switch set being coupled from said transformer to said output of said offline synchronous regulator; said control circuit being operated to receive said pulse signals for turning on or off said power-switch set; wherein said feedback signal is correlated to said output of said offline synchronous regulator; said pulse signals are generated for rectifying and regulating said offline synchronous regulator; and a polarity of said pulse signals determines on or off states of said power-switch set.