The iW628 is a precision voltage reference used to quickly detect voltage drops on the output of an AC/DC power supply and provide instantaneous feedback to the controller in order to improve the dynamic loop response of the overall power supply.

The device consumes a minimum amount of current, allowing the overall power supply to maintain no-load power consumption levels below 20mW. As a complement to Renesas' family of PrimAccurate™ AC/DC controllers, the iW628 helps improve the already high-performing AC/DC controllers while eliminating additional secondary-side components normally required to achieve similar levels of performance.


  • Fast Response Time to Voltage Changes
  • Less than 100µA of 'Normally-Off' cut-off current during normal operation
  • Wide Input Voltage Range of 2.5V to 15V (at DRV pin)
  • Built-in Optocoupler LED Driver
    • Minimum 2mA Driver Current




  • AC/DC Power Adapters
  • AC/DC Networking and Embedded Applications
  • Precision Voltage Reference


Type Title Date
Datasheet Log in to Download PDF 554 KB
Product Brief PDF 417 KB
Brochure PDF 5.49 MB 日本語
3 items

Design & Development