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


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.

Lifecycle status

● Active


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

<75mW with Ample Margin at 230VAC

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

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Product Briefs and Summaries
Name Date Version
iW1796 Product Summary (455.05 KB) 09/03/2020 1.1
Name Date Version
iW1796 Datasheet (1.14 MB) (Registered users only) 11/11/2020 1.4
Reference designs
Name Date Version
Reference Design EBC10227: iW1796-09 + iW662-01 18W QC2.0 & QC3.0 Charger Design (3.56 MB) (Registered users only) 26/08/2019 1.0