The iW657P 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 iW657P works with Renesas' (iW1791, iW1797, iW1799) RapidCharge™ 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. It also offers an optional secondary-side current sensing circuit to provide additional over-load fault protection.

The iW657P also works with Renesas' iW676 synchronous rectifier, which eliminates the need for a parallel Schottky diode for higher efficiency and lower BOM cost.

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
  • USB-IF PD 3.0 certified (USB PD 3.0 + PPS)
  • 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
  • Integrated Current Sense
  • Single Optocoupler for All Rapid Charge Information
  • Low No-Load Power Consumption <20mW
  • High Efficiency up to 90%
  • Double-Layer Cable Protection:
    • Secondary side (iW657P): 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


Design & Development