The iW3627 is a digital offline PWM controller that provides a constant voltage for smart LED lighting applications up to 90W with high power factor (PF >0.9) and low THD (<20%). It supports the most common single-stage isolated and non-isolated topologies (buck, buck-boost or flyback) as a front-end or standalone power supply in solid-state lighting (SSL) applications with advanced digital control technology.


  • Up to 90W Output Power with Enhanced Internal MOSFET Driver
  • Supports Isolated or Non-Isolated Topologies Including Flyback, Buck or Buck-Boost
  • High PF (>0.9) and Low THD (<20%)
  • Adaptive Output Voltage Transient Detection
    • Enables Fast Transient Response with Variation < +/-10% of nominal output voltage
  • Accommodates Large Capacitance Variations and Capacitor Aging Configurable Minimum Switching Frequency
    • Enables Low No-Load Standby Power Consumption (<200mW)
  • Configurable PWM Maximum Switching Frequency
    • Optimizes for High Efficiency, Small Size
  • Active Start-Up – Reduces Turn-On Time without Increasing Stand-By Power
  • Tiny 6-Pin SOT-23 Package
  • Fully Protected
    • Input Brown-Out Protection
    • Over-Temperature Protection
    • Output Overvoltage, Overcurrent and Over-Load Protection




  • Smart LED Lighting
  • LED Lighting Ballasts
  • Front-End Pre-Regulator

Design & Development