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The AP43776Q is a highly integrated, dual-channel, USB Type-C®, PD3.1 / PPS, BC 1.2 and QC protocol decoder. It passes certification of USB Type-C power delivery specification Rev 3.1 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 AP43776Q supports e-Marker cable detection with built-in VCONN switch with 30mA driving capability and over-current protection (OCP). Cable-loss compensations are also embedded.

During the power charging, AP43776Q can support Display Port Alternate Mode by decoding out the CC signal and deliver the routing signal to the mux switch through I2C interface, Meanwhile, the AP43776Q also supports BC1.2 CDP handshaking.

The AP43776Q 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 AP43776Q 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 AP43776Q can support various smart power-management functions such as power-sharing scheme between two attached USB Type-C PD devices, low-battery power de-rating, thermal power de-rating, LED light indication, etc. Two AP43776Q 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.


  • AEC-Q100 Qualified with the Following Results:
    • Device Temperature Grade 1: -40°C to +125°C TA Range
    • Device HBM ESD Classification Level H3A
    • Device CDM ESD Classification Level C5
  • Dual-channel independent USB Type-C PD3.1/PPS decoder
  • USB-IF PD3.1/PPS certificated TID: 9440
  • Quick Charge™ QC5 certificated No.: QC20211008263
  • 1/ full range of PPS VOUT (3.3V to 21V)
  • Compliant with BC1.2 DCP mode for QC2.0/3.0/4/4+/5
  • Type-C PD Display Port Alternative mode
  • BC 1.2 CDP (Charging Downstream Port) mode for Charging Downstream device and allow data transfer
  • Built-in ADC and multi-channel multiplexer for voltage and temperature measurement
  • e-Marker detection and VCONN 30mA capability
  • Cable-loss compensations
  • I2C Interface and Interrupt
  • Multi-purpose I/Os to support different applications
  • CC1/CC2 to VBUS short protection up to 24V
  • Moisture detection between DP and DN
  • Thermal protection through external NTC
  • Output power de-rating for low battery
  • Built-in MCU with 12KB OTP ROM for main application program with multi-time-programmable ROM (MTP ROM) blocks for customization
  • W-QFN4040-20(SWP) (4x4, 0.5mm pitch) package
  • Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
  • Halogen and Antimony Free. “Green” Device (Note 3)
  • The AP43776Q is suitable for automotive applications requiring specific change control; this part is AEC-Q100 qualified, PPAP capable, and manufactured in IATF 16949 certified facilities. https://www.diodes.com/quality/product-definitions/


  • In-vehicle multi-port USB PD3.1 charging systems

Product Specifications

Product Parameters

Compliance (Only Automotive(Q) supports PPAP) Automotive
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 5.5

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