Patent ID: 8300430
Filing Date: 2012-10-30
Classification: H02M,Y02B

Abstract:
1. A synchronous rectification circuit, comprising: a synchronous rectifier having a first and a second terminals; a first inductor having a first terminal and a second terminal connected to the first terminal of the synchronous rectifier; a second inductor having a first terminal connected to the second terminal of the synchronous rectifier and a second terminal; a controller coupled to the first and the second inductors, and receiving and comparing a sensed voltage signal measured across the first terminal of the first inductor and the second terminal of the second inductor and reflecting a voltage across the first and the second terminals of the synchronous rectifier, a threshold voltage signal and a compensation voltage signal to obtain a control signal to control the synchronous rectifier; and a compensation device providing the compensation voltage signal having at least one of functions of mitigating an influence of the first and the second inductors towards the sensed voltage signal and reducing the influence to zero.