SY22747AGC - Flyback Regulator For LED Lighting


  • Integrated 650V MOSFET
  • Quasi-Resonant (QR) Mode to Achieve Low Switching Losses
  • No Opto-coupler or Auxiliary Winding for Feedback in the Proprietary Floating Switch Configuration.
  • Reliable Short LED and Open LED Protection
  • Thermal Foldback Function
  • RoHS Compliant and Halogen Free
  • Compact Package: DIP8

Typical Application


SY22747 is a single stage Flyback regulator targeting at LED lighting applications. 
SY22747 integrates a 650V MOSFET to decrease physical volume. It adopts the proprietary control architecture to achieve an accurate regulation of LED current, Quasi-Resonant valley turn-on for high efficiency operation. Proprietary self-bias technique saves the bias supply and reduces the start up time. 
SY22747 integrates open/short LED protection and eliminates the need for opto-coupler or auxiliary winding (in floating switch application), thus minimizing the component count and board size.


  • LED Lighting