SY22654FAC - Single Stage BUCK PFC Constant-Voltage Regulator


  • Integrated 500VMOSFET
  • Valley Turn-on to Achieve Low Switching Losses
  • Power Factor >0.9 with Single-Stage Conversion
  • Maximum Switching Frequency Limitation 100kHz
  • RoHS Compliant and Halogen Free
  • Compact Package: SO8

Typical Application


The SY22654 is a single stage high PF Buck regulator, targeting at Constant Voltage (CV) applications. It adopts the proprietary control architecture to achieve accurate output voltage. Quasi-resonant valley turn-on operation and adaptive PWM/PFM control are adopted to achieve high efficiency.


  • AC/DC Adapters
  • LED Lighting