SY22688FAC - Flyback Regulator For LED Lighting


  • Integrated 600V MOSFET
  • Quasi-Resonant (QR) Mode to Achieve Low Switching Losses
  • Primary Side Control to Eliminate the Opto-coupler
  • Fast Startup (<300ms)
  • No Auxiliary Winding for Feedback
  • Reliable Short LED and Open LED Protection
  • RoHS Compliant and Halogen Free
  • Compact Package: SO8

Typical Application


The SY22688 is a Flyback regulator targeting at LED lighting applications.

It integrates a 600V MOSFET to decrease physical volume. It is a primary side controller without applying any secondary feedback circuit for low cost, and drives the Flyback converter in the quasi-resonant mode to achieve higher efficiency. Proprietary self-bias technique saves the bias supply and reduces the startup time.

It integrates open/short LED protection and eliminates the need for opto-coupler or auxiliary winding, thus minimizing the component count and board size.


  • LED Lighting