27W Low BOM Cost RapidCharge™ AC/DC Digital Controller with XM-Comm Technology in Small SOT23-6

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Supports Qualcomm® Quick Charge™ 3.0 with No Optocoupler; Companion to iW662 RapidCharge™ + Synchronous Rectifier Controller IC

The iW1796 is a 27W output, high performance AC/DC RapidCharge™ power supply controller that integrates Dialog’s XM-Comm technology, eliminating all optocouplers from travel adapters to reduce cost and improve reliability. The device comes in an SOT23-6 package, reducing the total solution size for space-sensitive travel adapter applications. The device can support Qualcomm Quick Charge 3.0 and 2.0 and other rapid charging protocols.

It is optimized to work with Dialog’s iW662 secondary-side synchronous rectifier controller and rapid charge interface IC. The iW662 IC uses XM-Comm technology to transmit all necessary information via an optocoupler to the iW1796, including voltage requests, output current limits, output voltage undershoot, output over-voltage, and fault and reset signals.

A full array of protection features includes Dialog’s advanced fault control technology to address soft short circuits in charger cables and connectors without latching off the output.

Qualcomm® Quick Charge™ is a product of Qualcomm Technologies, Inc.


  • Output power – 27W
  • Optimized to Work with iW662 to Support Multiple RapidCharge Protocols:
    • Qualcomm® Quick Charge™ 3.0
    • Qualcomm® Quick Charge™ 2.0
  • XM-Comm - Proprietary Secondary-To-Primary Digital Communication via Power Transformer:
    • Reduces BOM and Significantly Simplifies Design
    • Handles All Rapid Charging Information
  • SOT23-6 Package – Reduces Solution Size
  • High Resolution – 10mV Step Capable up to 21V
    • Ideal for USB PD Programmable Power Supply (PPS) and Other Protocols


  • Ultra-Low No-Load Power Consumption
    • <75mW with Ample Margin at 230VAC
    • <20mW with External Active Start-Up Circuit
  • Robust Protection Features
    • Output Over-Voltage Protection
    • Over-Current Protection
  • Advanced Fault Control Technology
    • Helps Protect Cables and Connectors from Excessive Heat and Damage by Reducing Average Power without Needing a Latch


  • RapidCharge AC/DC Power Adapters for Smartphones, Tablets and Other Mobile Devices Using Qualcomm Quick Charge 3.0, 2.0 and other Protocols

Block Diagrams

Typical Applications Diagram
Functional Block Diagram


Product Briefs and Summaries
Date Version
iW1796 Product Summary 11/11/2020 Rev. 1.3

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