The iW3620 is a high-performance AC/DC power supply controller for applications up to 40W of output power, optimized for driving LEDs from an AC supply voltage. Designed to operate from a universal input voltage range of 85VAC to 264VAC, the iW3620 can be used across all voltage standards worldwide.

The iW3620 uses Renesas' proprietary PrimAccurate™ primary-side control technology, minimizing the external component count by removing the need for both the traditional opto-isolator and external compensation components, reducing solution size and cost. The device operates in quasi-resonant mode in order to optimize efficiency at heavy loads and uses pulse-by-pulse waveform analysis to offer loop response characteristics superior to traditional offline solutions. The iW3620 is fully protected and incorporates Renesas' EZ-EMI® technology to facilitate EMI management in the end application, giving the end-user an easy-to-design and robust solution for solid-state lighting.


  • PrimAccurate™ - Isolated Offline AC/DC Controller
  • EZ-EMI Design to Easily Meet Global EMI Specifications
  • Ideal for Offline LED Applications up to 40W
  • Universal Input Power Supply Range - 85VAC to 264VAC
  • Up to 130kHz Switching Frequency, Enables Small Adapters
  • Quasi-resonant Mode for Optimal Efficiency
  • Low 10µA Start-Up Current
  • Programmable Over-temperature Protection - External NTC Thermistor
  • Built-in Output Overvoltage Protection
  • Sense Resistor Short Circuit Protection
  • Open Circuit Protection




  • Solid-State Lighting
  • 40W LED Luminaires


Type Title Date
Datasheet PDF 1.37 MB
White Paper PDF 1.94 MB
White Paper PDF 807 KB
White Paper PDF 597 KB
4 items

Design & Development