Diodes Incorporated AP63201WU-EVM

Overview

AP63201WU-EVM from Diodes Incorporated is an evaluation board for the AP63201 synchronous buck converter, designed to demonstrate high-efficiency 3.8V–32V input to 5V/2A output conversion with integrated 125mΩ high-side and 68mΩ low-side MOSFETs, 500kHz fixed switching frequency, and proprietary EMI-reduction features including Frequency Spread Spectrum (±6% jitter) and optimized gate drive. It supports quick validation in consumer power supplies and FPGA/DSP point-of-load applications.

For engineers reviewing the AP63201WU-EVM datasheet, AP63201WU-EVM pinout, AP63201WU-EVM application, or AP63201WU-EVM equivalent, this board enables rapid characterization of efficiency, output ripple, thermal behavior, and EMI performance under real load conditions - especially critical for 12V/24V distributed bus and audio/video system designs requiring low-noise DC/DC conversion.

Technical Context

The AP63201WU-EVM implements a peak current mode controlled synchronous buck topology with internal compensation, supporting adjustable output voltages (1.8V–12V) via external resistor dividers and feed-forward capacitor C4 for phase margin stabilization with ultra-low-ESR ceramic outputs. Its layout prioritizes minimized loop area and dedicated test points for VIN, VOUT, SW, EN, and FB.

It integrates the AP63201 IC in TSOT26 package with validated component selection per Diodes' BOM: Würth 74439346100 inductor (10µH), dual 22µF X5R output capacitors, and precision 1% R1/R3 network for 5V output. The board operates across –40°C to +85°C ambient with thermal shutdown and cycle-by-cycle current limiting enabled.

Key Specifications

Availability

AP63201WU-EVM is available at Aetrix Electronics and suitable for FPGA power delivery, flat-panel TV mainboard supplies, and network system PoL conversion requiring stable component supply, fast prototyping turnaround, and production-ready reference design validation.

Supply support for AP63201WU-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 high-volume industrial and consumer markets.

The AP63201 product line delivers high-efficiency, EMI-optimized DC/DC converters targeting noise-sensitive applications in audio systems, display electronics, and connected home devices where compact size and regulatory compliance are critical.

FAQ

What input voltage range is supported on the AP63201WU-EVM?

The board accepts 3.8V to 32V DC input, matching the AP63201 IC's operational range. It is configured for 12V input testing per the Quick Start Guide, but users may apply 5V, 12V, 19V, or 24V sources directly to the VIN/GND terminals without modification.

How do I change the output voltage from 5V to another value?

Replace R1 and R3 with values from Table 1 in the datasheet (e.g., 62kΩ/77.5kΩ for 1.8V). The feedback network sets VOUT = 0.8V × (1 + R3/R1); all resistors must be 1% tolerance. No PCB changes are needed - only component swaps on the designated pads.

Does the AP63201WU-EVM include EMI measurement provisions?

Yes - it provides dedicated test points for VIN, VOUT, SW, and FB, plus a low-inductance ground plane and minimized hot-loop area. The board's layout follows Diodes' EMI-optimized guidelines, and FSS operation is active by default to aid CISPR-22/32 pre-compliance screening.

Can the AP63201WU-EVM be used for thermal performance evaluation?

Yes - the TSOT26 IC is mounted on a thermally enhanced pad with multiple vias to inner ground layers. Thermal imaging or thermocouple measurements at the IC body or LX pin confirm junction temperatures remain below 125°C at 2A/12V→5V, even without forced airflow.