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The AP43776 is a highly integrated, dual-channel, USB Type-C®, PD3.1 / PPS / QC5 protocol decoder. It passes certification of USB Type-C power delivery specification Rev 3.1 V1.1 with PPS and Quick ChargeTM  QC5 protocol.

The device can support the full range of PPS APDO (augmented power data object) from 3.3V to 21V with 20mV/step voltage resolution and up to 6A current with 50mA/step resolution for power management. To enable output current beyond 3A, the AP43776 supports e-Marker cable detection with built-in VCONN switch with 30mA driving capability and overcurrent protection (OCP). Cable-loss compensations are also embedded.

The AP43776 provides an embedded MCU and built-in ADC converters for voltage and temperature measurement, where overtemperature protection (OTP) and other specific functions can be implemented through I2C pins and rich GPIO pins. Working in conjunction with two I2C-equipped Buck-Boost controllers or converters which have PD3.1 PPS output circuitry, the AP43776 serves as the I2C master and supports two independent PD3.1 PPS charging applications without using additional Output Enable MOS chips for each PD3.1 output port.

With built-in firmware, the AP43776 can support various smart power-management functions such as power-sharing scheme between two attached USB Type-C PD devices, low-battery power derating, thermal power derating, LED light indication, etc. Two AP43776 devices can also be interconnected through a UART (GPIO) pin to implement smart power-sharing scheme for all four connected USB Type-C ports attached to a fixed power source.


  • Dual-channel independent USB Type-C PD3.1/PPS decoder
  • USB-IF PD3.1/PPS certificated TID: 6206
  • Quick Charge™ QC5 certificated No.: QC20211008263
  • Supports PD3.1/ full range of PPS VOUT (3.3V to 21V)
  • Compliant with BC1.2 (DCP)
  • Built-in MCU with 12KB OTP ROM for main application program with multi-time-programmable ROM (MTP ROM) blocks for customization
  • Built-in Built-in 16-CH 8b 83KHz SAR ADC for voltage and temperature measurement
  • Supports e-Marker detection and VCONN switch with 15Ω internal Rds_on
  • Supports cable-loss compensations
  • Supports I2C communication and GPIO controls
  • Multi-purpose I/Os to support different applications
  • Supports short protection between CC1/CC2 and VBUS (Up to 24V)
  • Supports short detection between DP and DN
  • Supports overtemperature protection (OTP)
  • Support output power de-rating for low battery and thermal
  • W-QFN4040-20 (4x4, 0.5mm pitch) package
  • 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/


  • Multi-port USB PD3.1 PPS car chargers
  • Multi-port USB PD3.1 PPS power sources

Product Specifications

Product Parameters

Compliance (Only Automotive(Q) supports PPAP) Standard
Protocols Supported USB PD3.0/3.1/PPS/QC3.0/4/4+/5 (MCU + OTP + Hardwired)
Power Role DFP (Downstream-Facing Port) Source
I2C Support Yes
SR Controller Embedded No
VBUS MOS Embedded No
VCC Maximum Rating 6

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