An Improved Current-Driven Method for Synchronous Flyback AC/DC Converters

Abstract

For low output voltage and relatively high current applications, synchronous rectifier technique can help improve efficiency in a flyback converter. An improved current-driven method for the synchronous rectifier (SR) is presented. Compared to the previous proposed current driven synchronous rectifier (CDSR), the proposed CDSR features simple structure, low driving loss, low component voltage stress and good performance. Analysis and experiments on a flyback prototype converter demonstrate the performance of the improved approach