The iW9802 digital AC/DC controller integrates Renesas' patented adaptive Zero Voltage Switching (ZVS) technology to enable ultra-small, lightweight, low cost, and easily portable power supplies for any AC-powered product. The device operates at high switching frequencies, which allows for a much smaller transformer and passive components, and it can work with a wide variety of third-party controllers, including the industry-standard programmable reference (TL431) to implement fixed-voltage or adjustable output power supplies for RapidCharge applications.

The iW9802 provides high efficiency, high voltage and current control accuracy. The device offers advanced protection features for current and voltage protection and includes primary-side control overvoltage and overcurrent protection circuits in the event that secondary-side protections fail, making power supplies using the iW9802 extremely robust.

The iW9802 pairs with the iW780 for USB PD 3.1 for single- and multi-port adapters up to 240W.

Learn more about Renesas' patented adaptive ZVS technology.


  • High switching frequency
    • Lighter, smaller transformer
    • Smaller passive components for easier EMI control
  • Patented adaptive ZVS control for high efficiency and low EMI
    • Efficiently recycles energy to minimize heat generation
    • Up to 94% efficiency
  • User-configurable ZVS timing optimizes performance for different power MOSFETs
  • Adaptive, seamless multi-mode control (MMC) improves efficiency and eliminates audible noise
  • AC unplug detection and X-cap discharge
  • Pairs with the iW780 for USB PD 3.1 for single- and multi-port adapters up to 240W
  • Rich protection for:
    • Overvoltage (OVP)
    • Overcurrent (OCP)
    • User-configurable over-temperature
    • Shoot-through
    • Brown-in/Brown-out
    • VSENSE/ISENSE short
    • Output short
    • Extra primary-side OCP and OVP if optocoupler fails
  • Hardwired state-machine solution prevents hacking of fast chargers. To learn more, see our "RapidCharge™ Controllers Prevent Fast Charger Hacking" blog




  • 100W+ USB PD power supplies with third-party PD controllers
  • USB Power Delivery 3.1 EPR power supplies
  • Multi-port chargers and adapters
  • D+, D- proprietary protocol RapidCharge protocol chargers
  • Power tools
  • Industrial power supplies
  • Network communication equipment
  • Laptop power supplies


Type Title Date
Product Brief PDF 624 KB
Brochure PDF 5.49 MB 日本語
Datasheet Log in to Download PDF 897 KB
Other Log in to Download ZIP 2.40 MB
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Design & Development