Patent ID: 7701736

Claim:
A synchronous rectifying circuit for power converter, comprising: an integrated synchronous rectifier comprising: a rectifying terminal, coupled to a secondary side of a power transformer; a ground terminal, coupled to an output of the power converter; a first input terminal; and a second input terminal, wherein a power transistor is connected between the rectifying terminal and the ground terminal; and the first input terminal and the second input terminal are coupled to receive a pulse signal for turning on/off the power transistor; and a pulse-signal generation circuit comprising: an input circuit, coupled to receive a switching signal; a first output terminal; and a second output terminal, wherein the switching signal is used for switching the power transformer of the power converter; the first output terminal and the second output terminal are utilized to generate the pulse signal; and an isolation device, coupled between the first input terminal and the second input terminal of the integrated synchronous rectifier, and the first output terminal and the second output terminal of the pulse-signal generation circuit.