FAN6921

集成的临界模式PFC /准谐振电流模式PWM控制器 Integrated Critical Mode PFC / Quasi-Resonant Current Mode PWM Controller

This application note presents practical step-by-step design considerations for power supply system employing ’s PFC/PWM combination controller, which combines a Boundary Conduction Mode BCM Power Factor Correction PFC controller and QuasiResonant QR PWM controller. Figure 1 shows the typical application circuit, where the BCM PFC converter is in the

front end and the Quasi-Resonant flyback converter is in the back end.