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AC/DC Adapter Interface IC Compatible with Qualcomm® Quick Charge™ 2.0 Technology

The iW636 is recommended for new designs.


Qualcomm Quick Charge 2.0 solution companion to the iW1780

The iW626 is a Rapid Charge™ secondary-side interface and communication IC that works with the iW1780 primary-side AC/DC digital controller to enable a low-cost Qualcomm Quick Charge 2.0 compliant adapter solution for smartphone and tablet power supplies.

The iW626 integrates an opto-coupler driver that relays commands to the iW1780 AC/DC controller. The iW626+iW1780 chipset provides efficiency as high as 88% to enable the higher power density needed for small form-factor fast charging adapters. It also uses Dialog's SmartDefender™ smart hiccup technology to help address soft shorts in cables and connectors.

The iW626 is UL verified. Read the UL Verification Certificate for the iW626.

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

Lifecycle status



Supports Qualcomm® Quick Charge™ 2.0 Technology High Voltage Dedicated Charging Port (HVDCP) Class A Applications – 5V, 9V and 12V outputs.

UL Verified

Backwards compatible with USB Battery Charging Specification Revision 1.2 (USB BC1.2) Dedicated Charging Port (DCP)

Unique Secondary-Primary Communication Technology

  • Relays Output Voltage Requests, Output Current Limits, Output Voltage Undershoot and Over-Voltage Protection
  • Single Opto-Coupler Relays Information from iW626 (Secondary) to iW1780 (Primary)

Programmable Active Fast Discharge Switch

  • Quickly Discharges VOUT from 9V/12V to 5V at Portable Device Unplug or Upon Request

10mW No-Load Standby Power Consumption at 5V Steady-State Operation

6-lead SOT-23 package

Fault protection

  • Pin-to-pin short circuit protection
  • Floating pin detection


Rapid Charge™ power adapters for mobile electronics

Qualcomm® Quick Charge™ 2.0 technology HVDCP Class A (5V, 9V, 12V) adapters

Block Diagrams


Typical applications diagram


Functional block diagram

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Product Briefs and Summaries
Name Date Version
iW626 Product Summary (468.66 KB) 05/04/2021 0.8
Name Date Version
iW626 Datasheet (730.29 KB) (Registered users only) 05/04/2021 0.9
Name Date Version
iW626+iW1780 Rapid Charge Chipset Brochure (879.33 KB)
Reference designs
Name Date Version
Reference Design EBC10073: iW1780-04 and iW626-04 5V/1.6A 9V/1.6A 12V/1.2A 85-264VAC Qualcomm® Quick Charge™ Adapter Design (4.21 MB) (Registered users only) 12/01/2016 1.0
Reference Design EBC10074: iW1780-01 & iW626-00 & iW671-00 5V/2A 9V/1.67A 12V/1.25A 85-264VAC Qualcomm® Quick Charge™ High Efficiency (4.12 MB) (Registered users only) 12/01/2016 1.0
Reference Design EBC10105: iW1780-00 and iW626-04 and iW673-00 for a 24W Qualcomm® Quick Charge™ 2.0 Design (4.02 MB) (Registered users only) 23/06/2016 1.0