Diodes Incorporated AP43776Q-EVB

Overview

AP43776Q-EVB from Diodes Incorporated is an automotive-grade evaluation board for the AP43776Q dual-channel USB Type-C PD3.1/PPS protocol decoder IC. It enables rapid validation of 120W dual-port car charger designs supporting full-range PPS (3.3–21V @ 20mV/step, up to 6A @ 50mA/step), QC5, BC1.2 CDP/DCP, and DisplayPort Alternate Mode decoding with integrated VCONN switching and cable-loss compensation.

For engineers reviewing the AP43776Q-EVB datasheet, AP43776Q-EVB pinout, AP43776Q-EVB application, or AP43776Q-EVB equivalent, this board provides hardware-verified reference implementation for AEC-Q100 Grade 1 (-40°C to +125°C) in-vehicle USB PD3.1 charging systems - including dual-port 120W design (Figure 3), four-port smart power-sharing architecture (Figure 2), and DP Alt Mode + CDP data/power coexistence (Figure 4).

Technical Context

The AP43776Q-EVB implements a complete two-channel USB Type-C PD3.1 system using one AP43776Q IC paired with two I2C-controlled buck-boost converters. It validates real-time firmware-driven power sharing, thermal de-rating via GPIO-connected NTC, and VBUS MOS switch elimination through direct GPIO control of converter enable pins (e.g., GPIO2).

Board-level features include CC1/CC2 signal routing to both Type-C ports, DP/DN traces for Alt Mode verification, UART interconnect capability between two AP43776Q units, and dedicated test points for VREG (5V internal regulator), I_SENSE, INTB, and all 20-pin W-QFN4040-20 package signals - enabling full functional and timing validation per USB-IF TID 9440 and QC5 certification requirements.

Key Specifications

Availability

AP43776Q-EVB is available at Aetrix Electronics and suitable for in-vehicle multi-port USB PD3.1 charging systems, automotive infotainment power management, and OEM telematics module development requiring stable component supply and certified reference hardware.

Supply support for AP43776Q-EVB includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability power management, signal integrity, and connectivity solutions for automotive, industrial, and consumer markets.

The AP43776Q product line delivers AEC-Q100 qualified, MCU-based USB Type-C protocol decoders optimized for automotive-grade multi-port charging systems with integrated power sharing, thermal protection, and DP Alt Mode support.

FAQ

What is the primary function of the AP43776Q-EVB?

The AP43776Q-EVB is an evaluation board designed to validate the AP43776Q dual-channel USB Type-C PD3.1/PPS decoder IC in automotive applications. It demonstrates full compliance with USB-IF PD3.1 (TID 9440) and QC5 standards, supports 120W dual-port charging, smart power sharing between ports, and DP Alternate Mode handshaking - all under AEC-Q100 Grade 1 conditions.

Does the AP43776Q-EVB include firmware pre-loaded on the AP43776Q IC?

Yes - the AP43776Q IC mounted on the AP43776Q-EVB includes factory-programmed firmware supporting PD3.1/PPS, QC5, BC1.2 DCP/CDP, and DP Alt Mode. The 12KB OTP ROM contains certified protocol stacks, while MTP ROM blocks allow user customization of power-sharing rules, LED indicators, and thermal thresholds without reprogramming OTP.

Can the AP43776Q-EVB be used to evaluate four-port USB-C charging?

Yes - the board supports UART-based interconnection between two AP43776Q units (via GPIO1/GPIO2), enabling validation of four-port smart power-sharing topologies as shown in Figure 2 of the datasheet. This configuration allows dynamic load balancing across four USB-C ports powered by a single fixed-source input, with coordinated voltage/current regulation via I2C and UART buses.

What power supply and interface connections are required to operate the AP43776Q-EVB?

The AP43776Q-EVB requires a 9–24V DC input (VIN) to emulate automotive battery rail conditions. It provides standard 0.1" headers for I2C (SCL/SDA), UART (TX/RX), GPIO test points, and CC/DP/DN signal access. The board derives its 5V VREG internally and supplies it to attached buck-boost controllers - no external 5V source is needed for basic operation.