Diodes Incorporated AP63300QWU-EVM

Overview

AP63300QWU-EVM from Diodes Incorporated is an automotive-grade evaluation module for the AP63300Q 32V, 3A synchronous buck converter. It implements a fixed-frequency peak current mode controller with integrated 75mΩ/40mΩ MOSFETs, 500kHz switching, 22μA quiescent current in PFM mode, and Frequency Spread Spectrum (±6% jitter) for EMI reduction. Designed for rapid validation of 5V/3.3V power rails in automotive infotainment and instrument cluster applications.

For engineers reviewing the AP63300QWU-EVM datasheet, AP63300QWU-EVM pinout, AP63300QWU-EVM application, or AP63300QWU-EVM equivalent, this board enables fast functional verification of AEC-Q100 Grade 1 DC-DC conversion under real VIN = 3.8–32V conditions, load transients up to 3A, and thermal stress up to +125°C ambient - with pre-layout optimized EMI performance and soft-start sequencing support.

Technical Context

The AP63300QWU-EVM implements the AP63300Q IC in TSOT26 package with full external component set per Figure 1 of DS43699: 6.8μH inductor, dual 22μF output capacitors, 10μF input capacitor, and FB resistive divider (158kΩ/30.1kΩ) preset for 5V output. It supports both EN-controlled startup and automatic VIN-coupled enable via internal 1.5μA pull-up.

Board-level features include test points for VIN, VOUT, SW, BST, EN, and FB; solder jumpers for FSS enable/disable and EN delay capacitor addition; and thermal pad layout matching Diodes' recommended θJA = 89°C/W FR-4 footprint. No firmware or configuration required - operation is purely analog/hardware-defined.

Key Specifications

Availability

AP63300QWU-EVM is available at Aetrix Electronics and suitable for automotive infotainment power validation, instrument cluster DC-DC prototyping, and ADAS subsystem rail testing requiring stable component supply and production-aligned thermal/EMI behavior.

Supply support for AP63300QWU-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 ICs, specializing in high-reliability power management, signal integrity, and protection solutions for automotive, industrial, and consumer markets.

The AP63300QWU-EVM belongs to Diodes' Automotive Power Evaluation Platform line, designed to accelerate qualification of AEC-Q100-compliant DC-DC converters in safety-critical vehicle subsystems with minimal design-in effort.

FAQ

What input voltage range does the AP63300QWU-EVM support?

The AP63300QWU-EVM supports 3.8V to 32V DC input, fully covering automotive battery operating conditions including cold-crank (down to ~6.5V), normal operation (13.5V–14.5V), and load-dump transients (up to 32V). Input capacitance uses a single 10μF X7R ceramic rated for 35V, verified per DS43699 recommendations.

Can the output voltage be adjusted, and how?

Yes - the board ships with a 5V output set by R1 = 158kΩ and R2 = 30.1kΩ on the FB divider. Output voltage can be recalculated using VOUT = 0.8V × (1 + R1/R2) and adjusted by replacing either resistor. The FB pin is accessible via test point, and layout supports 0603/0805 footprints for easy rework without trace modification.

Does the AP63300QWU-EVM support enable sequencing or power-rail timing control?

Yes - the EN pin is brought out to a test point and supports external logic-level control (1.18V threshold) or passive delay via optional capacitor to GND. Equation Cd[nF] ≈ 1.27 × td[ms] (from DS43699 p.14) allows precise startup delay tuning - e.g., 127nF yields ~100ms delay - enabling safe sequencing with other rails in multi-voltage systems.

How is EMI performance validated on this evaluation board?

The AP63300QWU-EVM implements Diodes' proprietary ringing-free gate driver and default-enabled Frequency Spread Spectrum (±6% jitter), both confirmed in DS43699 Figures 19–22 and 33–36. Board layout follows strict EMI best practices: minimized SW loop area, solid GND plane, separated analog/digital grounds, and shielded test points - enabling direct CISPR 25 Class 5 pre-compliance measurement.