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45W High Resolution RapidCharge™ AC/DC Digital Controller with Advanced Protection Features


Supports USB PD 3.0, Qualcomm® Quick Charge™ 4+, and Direct Charge Adapters; Companion to iW657P USB PD 3.0 Controller

The iW1799 is a 45W output, high performance AC/DC RapidCharge™ power supply controller that supports USB Power Delivery with Programmable Power Supply (USB PD PPS) and other rapid charging protocols. The device offers high voltage and current resolution with the ability to step the voltage in 10mV increments up to 21V, ideal for USB PD PPS and Direct Charge adapters.

The iW1799 is optimized to work with Dialog’s iW657P USB PD interface controller in mobile device adapters to achieve fast and smooth voltage transition on request from the mobile device. The iW657P accepts fast charging protocols, including USB PD and transmits all necessary information via an optocoupler to the iW1799, including voltage requests, output current limits, output voltage undershoot, output over-voltage, and fault and reset signals.

The device offers a full array of advanced protection features, including an advanced fault protection technology that reduces power during a fault, an X-Cap discharge function to safely discharge the input capacitor when the travel adapter is unplugged, and 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 - 45W+

Optimized to Work with iW657P to Support Multiple RapidCharge Protocols:

  • USB PD 3.0 and 2.0
  • Qualcomm® Quick Charge 4+
  • Direct Charge
  • Other Proprietary OEM Protocols

Proprietary Secondary-To-Primary Digital Communication and Built-In Decoder:

  • Reduces BOM and Significantly Simplifies Design
  • Single Optocoupler for All Rapid Charging Information

High Resolution Voltage and Current Control

  • 10mV/Step up to 21V – Key for USB PD PPS and Direct Charge

Ultra-Low No-Load Power Consumption

  • <75mW with Ample Margin at 230VAC
  • <20mW with External Active Start-Up Circuit

Robust Protection Features

  • Input Over-Voltage Protection or Input X-Cap Discharge
  • Output Over-Voltage Protection
  • Over-Current Protection
  • SD pin for external NTC Temperature Protection

Advanced Fault Control Technology

  • Helps Protect Cables and Connectors from Excessive Heat and Damage by Reducing Average Power During Short Circuit without Latching


RapidCharge AC/DC Power Adapters for Smartphones, Tablets and Other Mobile Devices Using USB PD, Qualcomm Quick Charge 4+, Direct Charge Protocols

Block Diagrams


iW1799 iW657P 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
iW1799 Product Summary (436.27 KB) 05/05/2020 1.1
Name Date Version
iW1799 Datasheet (1.07 MB) (Registered users only) 22/05/2020 0.91
Reference designs
Name Date Version
Reference Design EBC10222: iW1799-02 + iW657P-27-93B + iW676-00 27W USB PD PPS Constant Power Design (3.71 MB) (Registered users only) 26/08/2019 1.0
Reference Design EBC10223: iW1799-02 + iW657P-27-92B + iW676-00 33W USB PD PPS Design (3.93 MB) (Registered users only) 26/08/2019 1.0
Reference Design EBC10224: iW1799-32 + iW657P-45-94B + iW676-00 45W USB PD PPS 48W Max Design (5.61 MB) (Registered users only) 26/08/2019 1.0
Reference Design EBC10225: iW1799-32 + iW657P-65-F0 + iW676-00 65W USB PD PPS Electronically Marked Cable (EMC) Design (3.68 MB) (Registered users only) 03/09/2019 1.0