Integrated with a highly accurate control circuit, the iW1816 operates in a quasi-resonant mode allowing it to easily meet global energy efficiency standards, with less than 30mW of no-load power consumption.

The iW1816 includes an adaptive soft-start circuit that intelligently controls start-up over a range of output voltages from 5V to 12V and higher, and into capacitive loads up to 6000µF, making it ideal for applications such as smart meters, home appliances and networking equipment. The iW1816 also incorporates Renesas' PrimAccurate™ primary-side digital control algorithms that enable a fully isolated solution without the need for an optocoupler, reducing cost and solution size while greatly improving reliability. Additional functionality includes full protection from over-temperature, overvoltage and overcurrent conditions as well as EZ-EMI® design techniques to allow for a solution that easily meets global EMI specifications.


  • Meets proposed mandatory federal efficiency standards for external power supplies
  • AccuSwitch™ - Integrated 800V power bipolar junction transistor (BJT)
  • Adaptively controlled soft start-up - Fast yet smooth start-up into large capacitive loads
  • Optimized for 5W output power range capable
  • Easily meets Energy Star® AC-DC power supply efficiency specs (Rev. 2.0)
    • Less than 30mW no-load power consumption
  • PrimAccurate™ - Primary-side control, no optocoupler needed
  • Quasi-resonant control for optimal efficiency
  • EZ-EMI™ design to easily meet global EMI specifications
  • 64kHz PWM switching frequency
  • Fully protected from fault conditions:
    • Over-temperature protection
    • Output overvoltage and overcurrent
    • Sense-resistor short circuit protection




  • Smart meters
  • Motor control
  • Networking devices
  • Home automation and appliances


Type Title Date
Datasheet PDF 1.11 MB
Other Log in to Download ZIP 2.29 MB
Brochure PDF 5.49 MB 日本語
Other Log in to Download ZIP 1.46 MB
Other Log in to Download ZIP 1.47 MB
White Paper Log in to Download PDF 766 KB
White Paper PDF 597 KB
7 items

Design & Development