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

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Supports Qualcomm® Quick Charge™ 3.0 and 2.0 without Optocoupler; Companion to the iW662 Rapid Charge™ and Synchronous Rectifier Controller IC

The iW1790 is a 27 W output, high performance AC/DC RapidCharge™ power supply controller that integrates Dialog’s XM-Comm technology, removing all optocouplers from travel adapters to reduce cost and improve reliability. The device also uses advanced source charging technology to integrate additional high voltage components, further reducing the overall BOM cost in travel adapter applications. The device supports Qualcomm Quick Charge 3.0 and 2.0 along with other rapid charging protocols.

It is optimized to work with Dialog’s iW662 secondary-side device, which integrates a RapidCharge interface IC and a synchronous rectifier controller. The iW662 uses Dialog’s XM-Comm technology to transmit all necessary information to the iW1790, 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 SmartDefender+™ advanced hiccup technology to address soft short circuits in charger cables and connectors, helping to prevent excessive heat build-up and damage. Learn more about advanced hiccup technology here.

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


  • Output power up to 27 W
  • 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
  • Vcc Source Charging Technology – Reduces BOM and Keeps High Efficiency
    • Eliminates External Start-up Device
    • High Efficiency up to 90%
  • Low No-Load Power Consumption <20 mW
  • Robust Protection Features
    • Output Over-Voltage Protection
    • Over-Current Protection
  • SmartDefender+™ Advanced Hiccup Technology Helps Protect Cables and Connectors from Excessive Heat and Damage by Reducing Average Power During Short Circuit by at Least 75%


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

Block Diagrams

Typical Applications Diagram
Functional Block Diagram


Product Briefs and Summaries
Date Version
iW1790 Product Summary 24/10/2018 Rev. 1.4

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