SY22678ABC - Single Stage Buck PFC Controller For LED Lighting


  • Valley Turn-on of the MOSFET to Achieve Low Switching Loss
  • 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: SOT23-6

Typical Application


The SY22678 is a single stage Buck PFC controller targeting at LED lighting applications. It is a Buck converter operates in the quasi-resonant mode to achieve higher efficiency and keeps in constant on time operation to achieve high power factor. It adopts special design to achieve quick start up and reliable protection for safety requirement.


  • LED Lighting
  • Down Light
  • Tube Lamp
  • PAR Lamp
  • Bulb Lamp