Offline LED Driver with Power Factor Correction and Primary Side Regulation

Datasheet | ƾڪ
Overview / Features / Applications


AP1200 is an off line LED driver with power factor correction (PFC). Its primary side regulation method eliminates the needs of opto-coupler and any secondary side feedback circuit.


  • Constant current output ( +/- 5%)
  • Isolated flyback configuration with primary side regulation (PSR). No opto-coupler is needed.
  • Boundary conduction mode (BCM) power factor correction ( PF > 0.9)
  • Zero current detect (ZCD) with valley switching
  • Gate driver to drive external power MOSFET
  • MOSFET over current protection (OCP)
  • Output over voltage protection (OVP)
  • Output short circuit protection (SCP)
  • Over temperature protection (OTP)
  • VCC under voltage lockout (UVLO) with hysteresis
  • Low startup current ( 9gA)
  • Low quiescent operating current ( 600gA)
  • Auto restart after fault conditions
  • Built-in VCC voltage clamp
  • Built-in gate driver output voltage clamp
  • High efficiency ( > 85% ) for 5W to 20W LED application.


  • Off line PFC LED driver ( 5W to 20W)