The iW9809 digital AC/DC controller integrates Renesas' patented quasi-resonant (QR) valley mode switching technology along with both CCM and DCM operation to enable ultra-small, lightweight, low cost, and easily portable power supplies for smartphones, tablets and other portable products. The device operates in adaptive QR mode with CCM operation at low line voltage, enabling smaller passive components and lower overall total BOM cost. The iW9809 supports USB Power Delivery 3.0 with Programmable Power Supply (USB-PD PPS), along with other RapidCharge protocols at output powers up to 65W.

The iW9809 pairs with Renesas' iW709 secondary-side IC, which integrates fast charge protocol support, USB Type-C control and synchronous rectification FET control. The combined chipset offers a complete high power density AC/DC charging solution, efficiencies up to 90% and advanced protection features to enable high power charging with safe, cool operation in a small physical charger size.


  • Adaptive quasi-resonant (QR) control with CCM operation for improved low-line performance
    • Reduces power loss at low line voltages
    • Reduces overall transformer and passive component sizes
  • Adaptive, seamless multi-mode control (MMC) improves efficiency and eliminates audible noise
  • AC unplug detection
  • 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
  • Intelligent, eco-friendly low standby power <20mW
  • Supports USB Power Delivery 3.0 with PPS (iW709)
  • Hardwired state-machine solution prevents hacking of fast chargers. To learn more, see our "RapidCharge™ Controllers Prevent Fast Charger Hacking" blog




  • Low cost, ultra-small, lightweight 65W RapidCharge AC/DC power supplies and adapters for smartphones, tablets and other portable devices using USB PD


Type Title Date
Product Brief PDF 503 KB
Brochure PDF 5.49 MB 日本語
Datasheet Log in to Download PDF 579 KB
3 items

Design & Development