Diodes Incorporated AP33772-EVM

Overview

AP33772-EVM from Diodes Incorporated is a USB Type-C® PD3.0/PPS evaluation module designed to validate and develop sink-side power negotiation for battery-powered or DC-input TCDs. It integrates the AP33772 sink controller IC, supports I2C-controlled 20mV/step voltage and 50mA/step current tuning, implements OVP/OCP/OTP protection with auto-restart, and enables dead-battery mode operation across 3.3V–24V input range.

For engineers reviewing the AP33772-EVM datasheet, AP33772-EVM pinout, AP33772-EVM application, or AP33772-EVM equivalent, this module provides hands-on validation of USB PD3.0 sink behavior-including CC1/CC2 handshake, BMC transceiver timing, PPS profile selection via I²C (0x51), fault LED indication, and NMOS VBUS switch control-prior to system integration.

Technical Context

The AP33772-EVM implements a complete USB PD sink reference design centered on the AP33772 IC, which combines an MCU+OTP firmware architecture with dedicated hardware BMC transceiver, multi-channel ADC, and integrated gate driver for external nMOS VBUS switching. It operates as an I²C slave (address 0x51) with GPIO3 interrupt signaling to host MCU.

It validates real-time power negotiation using fixed PDOs and PPS APDOs, supports thermal derating via NTC (10kΩ) connected to OTP pin, and executes protection responses-including hard reset transmission on OVP, internal discharge path activation, and VBUS switch turn-off within 50μs of OVP trip-per USB PD Rev. 3.0 v1.2 compliance requirements.

Key Specifications

Availability

AP33772-EVM is available at Aetrix Electronics and suitable for USB PD3.0 compliance validation, PPS power adapter interoperability testing, and embedded TCD power architecture development requiring stable component supply and rapid prototyping support.

Supply support for AP33772-EVM 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 industrial, consumer, and computing applications.

The AP33772-EVM belongs to Diodes' USB Power Delivery evaluation platform product line, engineered to accelerate design-in of compliant, high-voltage-tolerant sink controllers into battery-powered and DC-input TCDs without external HV components.

FAQ

What is the primary purpose of the AP33772-EVM?

The AP33772-EVM is a fully assembled evaluation module that demonstrates and validates the AP33772 USB PD3.0/PPS sink controller's functionality-including CC1/CC2 detection, BMC communication, I²C-configurable power requests (20mV/50mA steps), OVP/OCP/OTP response, and NMOS VBUS switch control-in a real-world TCD context.

Does the AP33772-EVM require external firmware loading?

No. The AP33772-EVM ships with the AP33772 IC pre-programmed with USB PD Rev. 3.0 v1.2-compliant sink firmware stored in on-chip OTP memory. Users interact via I²C commands (e.g., RDO write to 0x30, STATUS read from 0x1D) to configure PDO/APDO selection, protection thresholds, and thermal parameters.

Can the AP33772-EVM operate with non-PD sources?

Yes-but with defined behavior: when a non-PD source is connected, the AP33772 detects absence of valid BMC handshake, holds VBUS at 5V, disables the external NMOS VBUS switch, and activates FAULT LED flashing per the datasheet-defined mismatch indication sequence.

What thermal sensing components are supported on the AP33772-EVM?

The AP33772-EVM provides a dedicated OTP pin interface for a 10kΩ NTC thermistor placed near thermal hotspots. User-configurable resistance values at +25°C, +50°C, +75°C, and +100°C (TR25–TR100 registers) enable accurate temperature calculation and thermal derating (DRTHR register) or shutdown (OTPTHR register) decisions.