SY22717NFAC - Buck Regulator For LED Lighting


  • Integrated 500V MOSFET
  • Quasi-Resonant (QR) Mode to Achieve Low Switching Losses
  • Fast  Start up (<300ms)
  • No Opto-coupler or Auxiliary Winding for Feedback in the Proprietary Floating Switch Configuration
  • Reliable Short LED and Open LED Protection
  • Thermal Foldback Function
  • Maximum Output Power : 30W
  • RoHS Compliant and Halogen Free
  • Compact Package: SO8

Typical Application


The SY22717N is a Buck regulator targeting at LED lighting applications.

It integrates a 500V MOSFET to decrease physical volume. It adopts the proprietary control architecture to achieve an accurate regulation of LED current and Quasi-Resonant valley turn-on for high efficiency operation. Proprietary self-bias technique saves the bias supply and reduces the start up time.

It 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