Integrated Secondary-Side Synchronous Rectifier Controller and RapidCharge™ Interface IC for Qualcomm® Quick Charge™ 3.0 and 2.0 Applications

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Uses Dialog’s XM-Comm Technology to Remove All Optocouplers from Rapid Charge Solutions

The iW662 integrated secondary-side synchronous rectifier controller and rapid charge interface IC uses Dialog’s XM-Comm technology to communicate back to the primary-side controller, the (iW1790, iW1796, iW1798) eliminating the need for optocouplers to create solutions for rapid charging protocols such as Qualcomm Quick Charge 3.0 and 2.0 technology. 

The device also integrates a synchronous rectifier controller that uses adaptive off-time control to remove the need for a parallel schottky diode to reduce power loss during transitions.  The total solution reduces overall BOM cost and improves efficiency in reduced form-factor travel adapters.

The iW1790+iW662 chipset uses Dialog's advanced fault control technology to help address soft shorts in cables and connectors. Learn more about advanced hiccup technology here.

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


  • Integrates RapidCharge Interface IC and Synchronous Rectifier Controller in a Single IC
  • XM-Comm - Proprietary Secondary-to-Primary Digital Communication via Power Transformer:
    • No need for Optocoupler
    • Reduces BOM and Significantly Simplifies Design
    • Handles All Rapid Charging Information
  • Supports Multiple RapidCharge Protocols
    • Qualcomm Quick Charge 3.0
    • Qualcomm Quick Charge 2.0
  • Synchronous Rectifier Controller
    • High-voltage Drain Sensing up to 100 V With No Additional External Clamping Circuits Required
    • Lossless MOSFET VDS Sensing for SR Timing Control with Digital Adaptive Turn-Off Control
    • Optimized 5 V MOSFET Gate Driver

  • Double-layer cable protection:
    • Secondary side (iW662): Proprietary D+/D- Overvoltage Protection (OVP) Addresses VBUS D+/D Soft Shorts
    • Primary side (iW1790, iW1796, iW1798): Advanced Cable Fault Protection Reduces Average Output Power at Fault
  • Intelligent Low Power Mode Enables < 20 mW No-load Power Consumption
  • Dual Over-Temperature Protection (OTP)
    • On-chip Temperature Sensing Circuit and External NTC


  • RapidCharge AC/DC Adapters for Smartphones, Tablets, Other Portable Devices

Block Diagrams

Functional Block Diagram
iW1790 Typical Applications Block Diagram

iW1796 Typical Applications Diagram
iW1798 Typical Applications Diagram


Product Briefs and Summaries
Date Version
iW662 Product Summary 04/11/2019 Rev. 1.2
Date Version
iW662 High Voltage Dedicated Charging Port Verification

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