Diodes Incorporated
W QFN4040 24 Type A1

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The AP43781 is a highly integrated USB Type-C® power delivery controller targeted for monitor or TV power board with USB Type-C ports. It supports USB power delivery specification Rev3.1 SPR (Standard Power Range) with full range of programmable power supply (PPS). 

The AP43781 can support PPS APDO (Augmented Power Data Object) with resolution of 20mV/step in voltage and 50mA/step in current. In addition, cable-loss compensation and e-Marker detection are provided.

After the power negotiation is established, AP43781 can support DisplayPort™ by decoding out the CC signal and then deliver the routing control and signaling information to the high-speed switches and the re-driver/re-timer ICs through I2C interface, where the I2C bus can be assigned as master or slave, and GPIO pins can be programmed for different applications.

The AP43781 can offer comprehensive safety protection schemes, including overvoltage protection (OVP), undervoltage protection (UVP), overcurrent protection (OCP), short-circuit protection (SCP) and/or overtemperature protection (OTP).

A one-time programmable ROM is provided for main firmware, and a multi-time programmable ROM is provided for user configuration data.


  • Compatible with USB PD Rev3.1 SPR
  • Support Full Range of PPS 3.3V to 21V with Resolution of 20mV/Step in Voltage and 50mA/Step in Current.
  • Support Type-C Alternative Mode for DisplayPort
  • Built-in Regulator for CV and CC Control
  • Support OVP/UVP/OCP/SCP/OTP with Auto Restart
  • Support Power Saving Mode
  • Driver for Output Enable nMOS Switch
  • Support E-Marker Cable Detection
  • Support I2C Interface with Master and Slave Flexibility
  • Operating Voltage Range: 3.3V to 24V
  • OTP (One-Time Programmable) for Main Firmware
  • MTP (Multi-Time Programmable) for System Configuration
  • 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/


  • Monitors with Type-C ports
  • TV power boards with Type-C ports

Product Specifications

Product Parameters

Compliance (Only Automotive(Q) supports PPAP) Standard
Protocols Supported USB PD3.1 SPR (MCU + OTP + Hardwired)
Power Role DFP (Downstream-Facing Port) Source
I2C Support Yes
SR Controller Embedded No
VBUS MOS Embedded No
VCC Maximum Rating 24
VCC UVLO (V) 2.7

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