Diodes Incorporated AP33772S-EVB

Overview

AP33772S-EVB from Diodes Incorporated is an evaluation board for the AP33772S USB PD3.1-compliant I²C sink controller IC, designed to validate power negotiation, voltage/current control, and protection functions in Type-C battery-powered devices. It supports EPR/AVS, 5V–28V VOUT range, ±24mA current sensing resolution, OTP/UV/OV/OCP protection, and real-time status monitoring via I²C register access.

For engineers reviewing the AP33772S-EVB datasheet, AP33772S-EVB pinout, AP33772S-EVB application, or AP33772S-EVB equivalent, this board enables rapid validation of USB PD3.1 sink behavior-including PDO/APDO selection, CC flip detection, LED indication, interrupt-driven fault reporting, and NTC-based thermal de-rating-using Arduino or host MCU I²C interfaces.

Technical Context

The AP33772S-EVB implements a complete USB PD3.1 sink reference design with integrated back-to-back NMOS power switches (DMN3009SFG), 5mΩ current sense resistor, and NTC-based temperature monitoring circuitry. Its hardware supports both fixed and adjustable voltage profiles up to 28V, with programmable OVP offset (±2000mV), UVP threshold (80% of requested voltage), and OTP trip point (120°C default).

I²C communication operates at 100kHz/400kHz with slave address 0x52, enabling full register-level control of power negotiation, protection thresholds, thermal resistance calibration (TR25–TR100), and real-time readback of VOUT (80mV LSB), IOUT (24mA LSB), and die temperature (1°C resolution).

Key Specifications

Availability

AP33772S-EVB is available at Aetrix Electronics and suitable for USB PD3.1 sink validation, battery-powered portable electronics development, and embedded system power architecture prototyping requiring stable component supply and full firmware-accessible control.

Supply support for AP33772S-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 integrated circuits, specializing in power management, signal integrity, and connectivity solutions for consumer, industrial, and automotive markets.

The AP33772S product line delivers USB PD3.1-compliant sink controllers with I²C configurability, targeting compact, thermally constrained battery-powered devices needing flexible, standards-based charging without proprietary adapters.

FAQ

What host MCU interfaces are supported for controlling the AP33772S-EVB?

The AP33772S-EVB uses standard I²C (SDA/SCL pins, address 0x52) for bidirectional communication with any host MCU supporting 100kHz or 400kHz mode. The board includes pull-up resistors and GPIO-accessible INT, FLIP, and LED signals for event-driven control and status feedback without polling.

Does the AP33772S-EVB support USB PD3.1 Extended Power Range (EPR) operation?

Yes-the AP33772S-EVB fully supports EPR up to 28V/5A using its integrated back-to-back NMOS FETs (DMN3009SFG) and programmable VOUT range. Firmware implements EPR-specific message handling, including AVS (Adaptive Voltage Scaling) negotiation and extended PDO/APDO parsing per USB PD3.1 R2.0 spec.

How is overtemperature protection implemented on the AP33772S-EVB?

Overtemperature protection uses an external 10kΩ NTC thermistor connected between OTP pin and GND. The AP33772S applies a 100µA current source, measures resulting voltage, and calculates temperature using user-loaded TR25–TR100 calibration points stored in I²C registers. Trip threshold defaults to 120°C and is software-adjustable.

Can the AP33772S-EVB be used without a host MCU?

No-the AP33772S-EVB requires an external host MCU (e.g., Arduino UNO) to configure registers, initiate PD negotiations, read status, and respond to INT pin assertions. It lacks standalone firmware execution capability and relies entirely on I²C commands for all operational control and monitoring functions.