• 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

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.