Control of Power Electronic Converters
Technical Dialogue Session
Active clamp flyback (ACF) conveter, Synchronous rectification (SR), Secondary side resonant, digital control.
Secondary side resonant active clamp flyback (SSR-ACF) converter is a better candidate than primary side resonant active clamp flyback (PSR-ACF) converter to be used in high frequency small power supply applications. Based on the resonant capacitor voltage in SSR-ACF converter, this paper proposes an accurate synchronous rectification (SR) control method to turn off the synchronous rectifier (SRer) at the right point. Compared with the current widely used SR detecting method, the turn off point of SRer based on the presented method can not be affect by noise or voltage oscillation, and not need complicated sensing circuit.