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36W High Power MediaTek Pump Express™ Plus-Compatible Digital PWM AC/DC Controller


High efficiency for small form factor adapters

The iW1788 is a highly integrated AC/DC off-line power supply controller designed to be compatible with MediaTek’s Pump Express™ Plus fast charge protocol for smartphones and tablets.  The iW1788 is a single-chip solution for output power up to 36W that uses Dialog’s intelligent Rapid Charge™ digital algorithm and digital PrimAccurate™ primary-side control to significantly reduce charge times in USB AC/DC power adapters.

The iW1788 is highly efficient, and offers no-load standby power < 30mW, meeting the US Department of Energy’s external power supply efficiency requirements and Version 5, Tier 2 of the EU’s Code of Conduct for external power supplies.  The iW1788 also offers a full array of protection features including overvoltage, short circuit and over-temperature protection.

Lifecycle status



Supports MediaTek Pump Express™ Plus fast charge protocol

24W PrimAccurate™ isolated off-line controller

  • Eliminates secondary-side regulator and optical feedback isolator

Built-in digital intelligence on primary side for intelligent dynamic voltage scaling to optimize charge time

Meets DoE External Power Supply and EU Code of Conduct Version 5, Tier 2 standards

  • < 30mW no-load power consumption

Adaptive Multi-Mode PWM/PFM control improves efficiency

No audible noise over the entire operating range

Active start-up scheme enables fastest possible start-up

Cable drop compensation – configurable

Low EMI design

No external compensation needed

SmartDefender™ Smart Hiccup Technology

  • Helps Address Soft-Shorts in Cables, Connectors without Latching Off
  • Helps Protect Cables and Connectors from Excessive Heat and Damage by Reducing Average Power During Short Circuit by at Least 50%

Fully protected from fault conditions

  • Over-temperature protection
  • Output short circuit
  • Output low impedance
  • Output overvoltage


Compact AC/DC power supplies and power adapters for portable electronics

Rapid Charge™ enabled adapters for smartphones

Linear AC/DC replacement

pump express

MediaTek’s Pump Express Plus protocol enables up to 45% faster charging times (compared to conventional chargers) for smartphones and media tablets. The iW1788 uses Dialog’s intelligent Rapid Charge™ technology, enabling adapters that can scale the output voltage from 3.6V to 12V to optimize charging times for high capacity batteries.

The iW1788 also incorporates Dialog's SmartDefender™ smart hiccup technology to help address soft short circuits in cables and connectors.

For 5.0W – 7.5W output power MediaTek Pump Express-compatible controller, see iW1680.

Block Diagrams


Typical Applications Diagram


Functional Block Diagram

To order a sample of any of our products, please complete the following form. We will provide up to five parts free of charge. Our sales department will provide pricing for samples orders exceeding five parts.

Sample Request Form

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Product Briefs and Summaries
Name Date Version
iW1788 Product Summary (615.89 KB) 24/02/2016 1.1
Name Date Version
iW1788 Datasheet (1.82 MB) (Registered users only) 06/12/2018 1.1
Reference designs
Name Date Version
Reference Design EBC10069: iW1788-00 5V/1.67A 7V/1.67A 9V/1.67A 12V/1.25A, 90-264VAC, MediaTek Pump Express™ Plus Travel Adapter Design (4.25 MB) (Registered users only) 12/01/2016 1.0