Diodes Incorporated

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The AP33771 is a highly integrated USB Type-C® PD3.0/PPS sink controller. The device is targeted for DC power requests and control for Type-C connector-equipped devices (TCD). To leverage increasing popularity of standard Type-C PD3.0 power adaptors, the AP33771 negotiates with an existing PD3.0 adaptor to acquire the required power profile to supply the TCD.

Working its role as DC-power requests from USB PD sources, the AP33771 interprets power input requirements (voltage/current and maximum power) from the TCD, and then establishes a power link with an external USB PD3.0 adaptor to output a suitable DC power. The voltage requests are specified by three pins (VSEL2, VSEL1, VSEL0). Up to eight voltages can be selected, and both fixed PDO and PPS APDO in the PD source adapter are supported in the AP33771 search algorithm. Up to ten maximum power levels can also be selected through different resistance values of the resistor connected to the PSEL pin (refer to figure 1 and 2).

Rich power functions are embedded on the chip to reduce total BOM while maintaining maximum flexibility. A one-time-programmable (OTP) ROM is provided to store the PD/sink controller firmware.


  • Compliant with USB PD Rev. 3.0 v1.2
  • USB-IF certificated TID: 5000
  • Supports up to eight voltage selections by pin setting
  • Supports voltage selection with dynamic pin setting
  • Supports power capability selection
  • Supports flash FAULT LED indication for negotiation mismatch
  • Supports OTP (One-Time-Programmable) for main firmware
  • Supports OVP with hard reset and auto restart
  • Supports driver for N-MOS VBUS power switch
  • Supports dead-battery mode
  • Operating voltage range: 3.3V to 24V
  • Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
  • Halogen and Antimony Free. “Green” Device (Note 3)
  • For automotive applications requiring specific change control (i.e. parts qualified to AEC-Q100/101/104/200, PPAP capable, and manufactured in IATF 16949 certified facilities), please contact us or your local Diodes representative. https://www.diodes.com/quality/product-definitions/


  • USB Type-C connector-equipped battery-powered devices
  • USB Type-C connector-equipped dc-power input devices
  • USB PD3.0 PPS testers
  • USB Type C-to-traditional barrel connector power adaptor cables

Product Specifications

Product Parameters

VCC Maximum Rating 24 V
OperatingCurrent (µA) 3300 µA
I2C Support No
Voltage Sense Reference(5V/9V/12V) Programmable
Current Sense Reference(5V/9V/12V) Programmable
VCC UVLO (V) 2.7 V
Release Date 202205

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