SY22731AFAC - Single Stage LED driver Dimmable, High PF and Low BOM Cost


  • Compatible with Leading Edge/Trailing Edge Dimmer
  • High PF Without any Dimmer, PF>0.9
  • Internal Dimming Curve 5%~100%
  • 350V FET Integrated
  • Quasi-Resonant Operation
  • Reliable Open/Short LED Protection
  • Thermal Fold Back
  • Low BOM Cost
  • RoHS Compliant and Halogen Free
  • Compact Package: SO8

Typical Application


SY22731A is a single-stage driver for LED lighting applications.

SY22731A adopts proprietary techniques to identify whether dimmer applied and dimmer types. Good compatibility is achieved with Leading/Trailing edge dimmer and high PF is achieved without any dimmer.

SY22731A drives the converter in Quasi-Resonant mode to achieve high efficiency. Reliable Open/Short LED protections are integrated.

SY22731A integrates high voltage power FET inside to save driver space further.

SY22731A is available in SO8 package.


  • LED Lighting
  • Leading Edge Dimming
  • Trailing Edge Dimming