• 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

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.