FAN6224

FAN6224 — Synchronous Rectification Controller for Flyback and Forward Freewheeling Rectification July 2014 FAN6224 Synchronous Rectification Controller for Flyback and Forward Freewheeling Rectification Features  mWSaver™ Technology: - Internal Green Mode to Stop SR Switching for Lower No-Load Power Consumption - 300 A Ultra-Low Green Mode Operating Current  Synchronous Rectification Controller  Suited for High-Side and Low-Side of Flyback Converters in QR, DCM, and CCM Operation  Suited for Forward Freewheeling Rectification  PWM Frequency Tracking with Secondary-Side Winding Voltage Detection  140 kHz Maximum Operation Frequency  VDD Pin Over-Voltage Protection (OVP)  LPC Pin Open/Short Protection  RES Pin Open/Short Protection  RP Pin Open/Short Protection  Internal Over-Temperature Protection (OTP)  SOP-8 Package Available Applications  AC-DC NB Adapters  Open-Frame SMPS Description FAN6224 is a secondary-side Synchronous Rectification (SR) controller to drive SR MOSFET for improved efficiency. The IC is suitable for flyback converters and forward freewheeling rectification. FAN6224 can be applied in Continuous or Discontinuous Conduction Mode (CCM and DCM) and Quasi-Resonant (QR) flyback converters based on a proprietary linear-predict timing-control technique. The benefits of this technique include a simple control method without current-sense circuitry to accomplish noise immunity. With PWM frequency tracking and secondary-side winding voltage detec...