Diodes Incorporated
W QFN4040 24 Type A1

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I2C USB PD3.1 EPR Sink Controller

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The AP33772S is a highly integrated USB Type-C® PD3.1 sink controller to support Extended Power Range (EPR) / Adjustable Voltage Supply (AVS) up to 28V and Standard Power Range (SPR) / Programmable Power Supply (PPS) up to 21V. The device is targeted for DC power request and control for flexible Type-C Connector-equipped Devices (TCDs) with an embedded host MCU (Micro Controller Unit) and I2C interface pins (SCL, SDA).

Through the I2C interface interaction and interrupt mechanism, the host MCU sets up proper desired power profile with relevant threshold parameters and delegates PD negotiation tasks to the AP33772S. The host MCU further inquiries about status of various I2C registers for intended applications.

Based on high-voltage process, the AP33772S offers short-protection between CC1/CC2 pins to adjacent high-voltage pin up to 34V. Smart built-in firmware of the AP33772S offers comprehensive safety protection scheme, including over-voltage protection (OVP), under-voltage protection (UVP), over-current protection (OCP), and moisture detection between DP and DN pins. In addition, overtemperature protection (OTP) and thermal de-rating are supported by an external NTC resistor.

An LED indicator is used to show the PD power negotiation status, and the automatic cable voltage drop compensation for a long cable is implemented to cover practical usage situations.


  • USB PD3.1 v1.6 Certified with TID: 10062
  • Operating Voltage Range of VCC: 3V to 31V
  • Support PD3.1 EPR/AVS Up to 28V and SPR/PPS Up to 21V
  • Support OVP with Hard Reset and Auto Restart
  • Support UVP and OCP with Output Power Shut Down
  • Support OTP and Thermal De-Rating Through NTC Resistor
  • VBUS Short Protection on CC1/CC2 Pins Up to 34V
  • I2C Commands for External MCU Monitoring, Control, and Parameter Programming
  • Dedicated Pins for CC Flip Indication and Interrupt Request
  • Dedicated Pins for Direct FAULT Control of VBUS MOS Switch
  • Moisture Detection between DP and DN
  • LED Indication for Different Negotiation Results
  • Driver for Output Enable N-MOS Switch
  • Support Dead Battery Function
  • Automatic Cable Voltage Drop Compensation
  • Support Legacy Type-A Charger with Type-A to Type-C Cable
  • 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 PD3.1 testers

Product Specifications

Product Parameters

Compliance (Only Automotive(Q) supports PPAP) Standard
VCC Maximum Rating 34
OperatingCurrent (µA) 3300
Protocol Compatible USB PD3.1
I2C Support Yes
Voltage Sense Reference(5V/9V/12V) Programmable
Current Sense Reference(5V/9V/12V) Programmable
VCC UVLO (V) 2.7
Release Date 202310

Technical Documents

Recommended Soldering Techniques