SY22778YAGC - Single Stage Buck PFC Regulator For LED Lighting


  • Integrated 600V MOSFET
  • Valley Turn-on of the MOSFET to Achieve Low Switching Losses
  • Power Factor >0.90 with Single-stage conversion
  • Low start up current: 15µA typical
  • Quick start up <500ms
  • Reliable short LED and Open LED protection
  • Power factor >0.90 with single-stage conversion
  • RoHS Compliant and Halogen Free
  • Compact package: DIP8

Typical Application


The SY22778Y is a single stage Buck PFC controller targeting at LED lighting applications. It integrates a 600V MOSFET to decrease physical volume. It adopts the proprietary control architecture to achieve an accurate regulation of LED current, unity power factor, and quasi-resonant valley turn-on high efficiency operation. It adopts special design to achieve quick start up and reliable protection for safety requirement.

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


  • LED Lighting