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65W Digital Quasi-Resonant RapidCharge™ AC/DC Controller


Pairs with iW709 to Create a Complete Solution for Low Total BOM Cost USB PD 3.0 Chargers and Travel Adapters

The iW9809 digital AC/DC controller integrates Dialog’s patented quasi-resonant (QR) valley mode switching technology along with both CCM and DCM operation to enable ultra-small, light-weight, 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 PPS, along with other RapidCharge protocols at output powers up to 65W.

The iW9809 pairs with Dialog’s 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.


Lifecycle status

● Active


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:

  • Over-voltage (OVP)
  • Over-current (OCP)
  • User-configurable over-temperature
  • Shoot-through
  • Brown-in/brown-out
  • Output short
  • Extra primary-side OCP & 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. Learn more


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

Block Diagrams


Typical applications diagram


Functional block diagram

To order a sample of any of our products, please complete the following form. We will provide up to five parts free of charge. Our sales department will provide pricing for samples orders exceeding five parts.

Sample Request Form

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Product Briefs and Summaries
Name Date Version
iW9809 Product Summary (422.42 KB) 21/10/2020 0.2
Name Date Version
iW9809 Datasheet (655.15 KB) (Registered users only) 21/10/2020 0.2