Diodes Incorporated AP22652FDZ-EVM

Overview

AP22652FDZ-EVM from Diodes Incorporated is an evaluation module for the AP22652FDZ precision adjustable current-limited power switch in W-DFN2020-6 package, supporting 3.0–5.5 V input, up to 2.1 A load current, and programmable current limit (125–2665 mA) via external resistor. It enables rapid validation of over-current protection, reverse current blocking, fault reporting, and soft-start behavior in USB-compliant and high-capacitance-load applications.

For engineers reviewing the AP22652FDZ-EVM datasheet, AP22652FDZ-EVM pinout, AP22652FDZ-EVM application, or AP22652FDZ-EVM equivalent, this board provides direct access to IN, OUT, EN, FAULT, ILIM, and GND test points with pre-populated 120 µF output capacitance, 10 µF input decoupling, and 20 kΩ current-limit resistor - enabling immediate functional verification without external component selection.

Technical Context

The AP22652FDZ-EVM implements the AP22652FDZ device in its native U-DFN2020-6 footprint, featuring active-low enable, 5 µs typical short-circuit response time, and 6 ms deglitch on the open-drain FAULT output. All passive components-including 120 µF aluminum output capacitor, 10 µF MLCC input capacitor, and 0.1 µF ceramic bypass capacitors-are pre-installed per Diodes' recommended layout.

It supports real-time monitoring of current limiting via FAULT pin assertion and load current saturation, with built-in thermal shutdown, over-voltage protection, and reverse current blocking during both shutdown and active states. The board operates across –40°C to +85°C ambient temperature and requires no external programming or configuration.

Key Specifications

Availability

AP22652FDZ-EVM is available at Aetrix Electronics and suitable for USB power delivery validation, set-top box power rail testing, and LCD monitor hot-swap evaluation requiring stable component supply and fast-turn prototyping support.

Supply support for AP22652FDZ-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 analog ICs, specializing in power management, signal integrity, and protection solutions for consumer, industrial, and computing markets.

The AP22652/53 product line delivers precision current-limiting power switches targeting USB-compliant ports, display power rails, and peripheral hot-swap interfaces where controlled inrush, fault reporting, and reverse current blocking are mandatory.

FAQ

What is the purpose of the 120 µF capacitor on the AP22652FDZ-EVM output?

The 120 µF aluminum electrolytic capacitor satisfies the USB specification's minimum bulk output capacitance requirement for stable voltage regulation during load transients and ensures reliable current-limit behavior under heavy capacitive loads. Its placement and value are validated in Diodes' AP22652/53 Application Note Rev. A to prevent false fault triggering and support full 2.1 A current delivery.

Can the AP22652FDZ-EVM be used to evaluate the AP22653FDZ device?

No - the AP22652FDZ-EVM is configured for the AP22652FDZ (active-low enable), with R4 installed as a 0 Ω jumper to pull EN low by default. The AP22653FDZ requires active-high enable logic; using it on this board would require hardware modification including removal of R4 and re-routing of EN control, voiding out-of-box functionality and violating the board's validated test setup.

How is short-circuit protection verified on this EVM?

Short-circuit protection is verified by increasing the load current on the OUT terminal until the FAULT pin asserts low (within 5 µs typical), confirming current-limit activation. The board's pre-set 20 kΩ RLIM resistor establishes a ~1.735 A threshold, and the 6 ms deglitch on FAULT prevents false triggering during brief transients - observable directly at the FAULT test point with an oscilloscope.

Does the AP22652FDZ-EVM include thermal protection demonstration capability?

Yes - the AP22652FDZ integrates thermal shutdown that activates above +125°C junction temperature. While the EVM does not include on-board temperature sensors, sustained overload beyond its 2.1 A rating under poor airflow will cause automatic shutdown and FAULT assertion, followed by auto-recovery upon cooling. This behavior is documented in the AP22652/53 datasheet and reproducible using a resistive load and thermal chamber.