Diodes Incorporated AP33771DKZ-13

Overview

AP33771DKZ-13 from Diodes Incorporated is a USB Type-C® PD3.0/PPS sink controller IC designed to negotiate DC power delivery from standard PD3.0 adapters for battery-powered or DC-input TCDs. It supports up to eight voltage selections (4.3V–20V) via VSEL0–VSEL2 pins, ten power levels (12W–100W) via PSEL resistor, and embedded BMC transceiver with USB-IF TID 5000 certification.

For engineers reviewing the AP33771DKZ-13 datasheet, AP33771DKZ-13 pinout, AP33771DKZ-13 application, or AP33771DKZ-13 equivalent, key selection considerations include PDO negotiation logic, VBUS NMOS gate control timing, OVP hard-reset behavior, and OTP firmware configurability for fixed/PPS APDO support in embedded sink designs.

Technical Context

The AP33771 implements a hybrid hardware/firmware USB PD3.0 sink stack: BMC transceiver handles physical-layer signaling on CC1/CC2, while OTP-stored firmware manages protocol state machines, PDO selection algorithms, and dynamic voltage/power matching. Its VSEL scanning logic latches pin states at power-on and periodically re-evaluates them to support runtime reconfiguration.

Power negotiation relies on analog front-end circuitry: IFB senses current via external shunt with 100nF bypass, VFB monitors output voltage, and PSEL's 20μA current source enables resistor-based power-level detection with ±1% accuracy requirement. OVP protection triggers hard reset + internal discharge path when VBUS exceeds PDO+2V (≤18V) or 110% (＞18V).

Key Specifications

Pinout & Package

AP33771DKZ-13 uses a 24-pin W-QFN4040-24 (Type A1) package with 0.4mm pitch and exposed thermal pad connected to GND. The package supports high-density PCB layouts and provides thermal resistance θJA = 28°C/W (FR-4, 2oz Cu).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar USB PD sink controller applications.

Compared with AP33771DKZ-13, AP33771C offers identical functionality with improved robustness for long-term manufacturing, while IP2721 extends voltage capability at the cost of added external regulators and higher system complexity.

Availability

AP33771DKZ-13 is available at Aetrix Electronics and suitable for USB-C power adaptor cables, portable battery-powered devices, PD3.0 test equipment, and DC-input industrial peripherals requiring stable component supply and full USB-IF certification traceability.

Supply support for AP33771DKZ-13 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 ICs, specializing in power management, signal integrity, and connectivity solutions for industrial, consumer, and computing markets.

The AP33771 belongs to Diodes' USB Power Delivery controller product line, engineered specifically for cost-sensitive, high-volume Type-C sink applications requiring minimal external components and full PD3.0/PPS compliance.

FAQ

What is the function of the PSEL pin and how is it used?

The PSEL pin sources a precise 20μA current to measure an external resistor value, enabling selection of one of ten power levels (12W–100W). A 6.8kΩ resistor sets 12W, while 91kΩ selects 100W; Diodes specifies ±1% resistor tolerance for accurate power request. This analog-based method eliminates need for digital configuration interfaces.

Does AP33771DKZ-13 support both fixed PDO and PPS APDO negotiation?

Yes, the AP33771DKZ-13 supports both fixed PDO and Programmable Power Supply (PPS) adjustable PDO (APDO) negotiation through its embedded firmware and BMC transceiver. Its search algorithm evaluates all advertised source capabilities and selects compatible profiles, including PPS voltage ranges like 3.3–21V with 20mV steps.

How does the OVP protection operate and what happens when triggered?

When VBUS exceeds the OVP threshold (PDO+2V for ≤18V PDOs; 110% for >18V), the AP33771DKZ-13 asserts a hard reset to the PD source and activates an internal 200mA discharge path. This reduces overvoltage duration within 50ms of trip detection, preventing damage to downstream circuitry before the source responds.

Can AP33771DKZ-13 operate with no battery present (dead-battery mode)?

Yes, AP33771DKZ-13 supports dead-battery mode by deriving initial operating power directly from VBUS through internal charge pumps, enabling startup and PD negotiation even when the connected device's battery is at 0V. This ensures reliable charging initiation in deeply discharged portable equipment.