USB Power Delivery 3.0 Interface Controller

A team of engineers is ready to answer your questions

Supports USB Power Delivery 3.0, Qualcomm® Quick Charge™ 4+, and Direct Charge Adapters

The iW656P USB power delivery (USB PD) 3.0 interface controller resides on the secondary side of the AC/DC power supply and manages the communication between the power adapter and mobile device.

The iW656P works with Dialog’s controllers (iW1791, iW1797, iW1799RapidCharge primary-side controller and supports fast charging protocols, including USB PD 3.0, Qualcomm Quick Charge 4+ and direct charging. It transmits all necessary information via an optocoupler to the primary side, including voltage requests, output current limits, output voltage undershoot, output over-voltage, and fault and reset signals.

The iW656P also works with Dialog’s iW676 synchronous rectifier, which eliminates the need for a parallel Schottky diode for higher efficiency and lower BOM cost.

For USB PD 3.0 interface controller with integrated current sense, see iW657P.

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


  • Supports Multiple RapidCharge Protocols:
    • USB PD 3.0 PPS (Programmable Power Supply)
    • Qualcomm® Quick Charge™ 4+
    • Direct Charge
    • Other RapidCharge Protocols
  • Compatible with USB Type-C™ Rev. 1.2
  • Supports wide output voltage range from 3.3 to 21V
  • NMOS VBUS Switch Lowers System Cost
  • VCONN Support for Smart Cables
  • Single Optocoupler for All Rapid Charge Information
  • Low No-Load Power Consumption <20mW
  • High Efficiency up to 90%


  • Double-Layer Cable Protection:
    • Secondary side (iW656P): D+/D-/CC1/CC2 Overvoltage Protection; Optional Secondary-Side Current Sensing Circuit for Over-Load Fault Protection
    • Primary side (iW1791, iW1797, iW1799): Advanced Cable Fault Protection Reduces Average Output Power at Fault
  • Automatic AC Un-Plug Detection
  • Protects Phone Battery from Damage Due to High Voltage Exposure if Charger is Unplugged then Re-Plugged into Mains with Charging Cable Still Connected


  • USB PD 3.0 AC/DC Power Adapters for Smartphones, Tablets, Laptops and Other Mobile Devices
  • USB PD 3.0 Power Supplies for Set Top Boxes, Displays, Speakers
  • USB PD 3.0 in-the-wall receptacles
  • Lamps and lighting fixtures with USB PD 3.0 ports

Block Diagrams

iW656P Functional Block Diagram
iW656P Typical Applications Diagram

iW1797_iW656P Typical Applications Diagram
iW1799_iW656P Typical Applications Diagram


Product Briefs and Summaries
Date Version
iW656P Product Summary 21/02/2019 Rev. 1.0

For technical support or information on how to buy, contact us directly.

Request Samples Contact Us Register for newsletter

Need technical help?

Visit our support web site to:

  • Get help from Dialog experts online.
  • Search the forums.
  • Access software, drivers, tools & utilities.