Diodes Incorporated AP63301QWU-EVM

Overview

AP63301QWU-EVM from Diodes Incorporated is an automotive-grade evaluation module for the AP63301Q synchronous buck converter, supporting 3.8V–32V input, 3A continuous output, 500kHz fixed-frequency PWM operation, and AEC-Q100 Grade 1 (−40°C to +125°C) qualification. It enables rapid validation of power delivery in automotive infotainment, instrument clusters, and telematics systems.

For engineers reviewing the AP63301QWU-EVM datasheet, AP63301QWU-EVM pinout, AP63301QWU-EVM application, or AP63301QWU-EVM equivalent, this board provides verified reference design implementation, EMI-optimized layout, thermal performance characterization, and direct interface to AP63301Q's EN, FB, SW, BST, VIN, and GND terminals under real-world load transients and line regulation conditions.

Technical Context

The AP63301QWU-EVM implements the AP63301Q IC in TSOT26 package with integrated 75mΩ high-side and 40mΩ low-side MOSFETs, enabling full evaluation of its peak-current-mode control loop, 4ms internal soft-start, and precision 0.8V ±1% feedback reference. It supports fixed-frequency PWM across all loads - eliminating light-load mode transitions that cause audible noise or regulation instability.

This EVM validates the AP63301Q's proprietary gate driver scheme that suppresses switching-node ringing without degrading rise/fall times, and demonstrates its robust protection suite: cycle-by-cycle current limit, output overvoltage protection (OVP), thermal shutdown at +160°C, and undervoltage lockout (UVLO) with 1.18V enable threshold.

Key Specifications

Availability

AP63301QWU-EVM is available at Aetrix Electronics and suitable for automotive infotainment system development, instrument cluster power validation, telematics module prototyping, and ADAS subsystem testing requiring stable component supply and production-ready reference designs.

Supply support for AP63301QWU-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 high-reliability power management, signal integrity, and protection solutions for automotive, industrial, and consumer markets.

The AP63301QWU-EVM belongs to Diodes' automotive power evaluation platform family, designed specifically to accelerate qualification of AEC-Q100-compliant DC-DC converters in safety-critical vehicle subsystems.

FAQ

What is the primary function of the AP63301QWU-EVM?

The AP63301QWU-EVM is a dedicated evaluation module for the AP63301Q 3A automotive buck converter. It provides a fully assembled, tested PCB with optimized layout, input/output filtering, thermal management, and test points to validate electrical performance, thermal behavior, and EMI characteristics under real operating conditions - not a production power supply.

Does the AP63301QWU-EVM support Frequency Spread Spectrum (FSS)?

No. FSS is exclusive to the AP63300Q variant. The AP63301QWU-EVM evaluates the AP63301Q, which operates in fixed-frequency PWM mode across all load conditions - eliminating frequency modulation but ensuring predictable EMI spectra and stable regulation during light-load operation.

Can the AP63301QWU-EVM be used to evaluate PFM efficiency?

No. The AP63301Q does not support PFM mode; it maintains constant 500kHz PWM regardless of load. For PFM evaluation (e.g., 22μA IQ, 88% efficiency at 5mA), users must select the AP63300Q and its corresponding evaluation module, AP63300QWU-EVM.

How is the output voltage configured on the AP63301QWU-EVM?

Output voltage is set via external resistor divider connected to the FB pin, using R1 = 158kΩ and R2 = 30.1kΩ as shown in the typical application circuit (DS43699 Figure 1), yielding a nominal 5.0V output. The board includes solder jumpers and test points to modify R1/R2 values for other VOUT configurations within the 0.8V–VIN range.