SY22744UFAC - Boost PFC Regulator


  • Integrated 520V MOSFET
  • Quasi-Resonant (QR) Mode to Achieve Low Switching Losses
  • PF>0.95, THD<10%
  • Output Over Voltage Protection 
  • Low BOM Cost
  • RoHS Compliant and Halogen Free
  • Compact Package: SO8

Typical Application


SY22744U is a single-stage Boost PFC Regulator. Constant tON operation is applied to achieve high PF and no multiplier is need. Quasi-Resonant switching is applied to achieve high efficiency and better EMI performance. 


  • Adaptors
  • Pre-stage for Two-stage AC/DC Converter
  • LED Lighting