Patent ID: 9391530
Filing Date: 2016-07-12
CPC Classification: H02M,H03K,Y02B

Claim Text:
1. A power converter having a synchronous rectifier, the power converter comprising: a transformer with a primary winding for receiving a DC input voltage and a secondary winding for providing an output voltage through an output capacitor; a synchronous rectifier coupled to the secondary winding of the transformer and the output capacitor, the synchronous rectifier including: wherein the control circuit comprises: first and second differential inputs, configured for coupling to a positive and a negative terminals of the power switch and sensing a voltage across that power switch; an output terminal, configured for outputting a signal to drive the power switch; a voltage comparing unit, configured to act in response to the first and second inputs, wherein the voltage comparing unit is configured to output a logic signal according to the voltage difference between the sensed voltage drop across the power switch and a reference threshold voltage; and