一种用于CCM同步整流反激变换器的新型原边PWM控制策略

A new primary PWM (pulsewidth modulation) control strategy for continuous conduction mode (CCM) synchronous rectification (SR) flyback converter is proposed in this letter. The PWM signal for the primary switch has been divided into two pulses in a switching period (dual-pulse PWM, DP-PWM). The first pulse is a fixed narrow pulse, which is used to turn off the SR, whereas the second pulse is a reg...