Diodes Incorporated AP62200WU-EVM

Overview

AP62200WU-EVM from Diodes Incorporated is an evaluation board for the AP62200 2A synchronous buck converter, supporting 4.2V–18V input and adjustable 0.8V–7V output. It integrates 90mΩ/65mΩ MOSFETs, operates at 740kHz with COT control, delivers ≤1% output accuracy at 5V, and features EMI-optimized layout with TSOT26 footprint-used to validate power delivery in flat-panel TV and set-top box designs.

For engineers reviewing the AP62200WU-EVM datasheet, AP62200WU-EVM pinout, AP62200WU-EVM application, or AP62200WU-EVM equivalent, this board enables rapid validation of transient response, efficiency at 2A load, switching node ringing suppression, and output voltage setting via external resistor dividers per Table 1 in the reference design guide.

Technical Context

The AP62200WU-EVM implements a fixed 5.0V output configuration using R1 = 115kΩ and R2 = 22.1kΩ, with L1 = 4.7µH (Wurth 744779747), and output filtering via two 22µF X5R ceramics (C2/C3) plus one 10µF input capacitor (C1). The board supports EN control via jumper JH12 and exposes SW, FB, BST, and GND test points for oscilloscope probing.

It reflects the AP62200's proprietary gate driver scheme that suppresses switching node ringing without degrading turn-on/turn-off times, and incorporates layout techniques-including minimized high-di/dt loop area and split ground planes-to reduce radiated EMI per FCC Class B requirements.

Key Specifications

Availability

AP62200WU-EVM is available at Aetrix Electronics and suitable for flat-panel TV power validation, set-top box DC/DC qualification, and consumer electronics embedded power design requiring stable component supply and fast-turn evaluation capability.

Supply support for AP62200WU-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 consumer and industrial applications.

The AP62200WU-EVM belongs to Diodes' evaluation platform series for its COT-controlled buck converters, designed to accelerate design-in of high-efficiency, low-EMI DC/DC solutions in space-constrained consumer electronics.

FAQ

What input voltage range is supported on the AP62200WU-EVM?

The board supports 4.2V to 18V input per the AP62200's operating range. The Quick Start Guide specifies 12V as the recommended test voltage, and absolute maximum VIN is 20V. Input is applied across VIN and GND terminals using screw terminals or solder pads.

How is output voltage adjusted on this evaluation board?

Output voltage is set by the R1/R2 feedback divider (115kΩ/22.1kΩ for 5.0V). To change VOUT, replace R1 per Table 1 in the reference document-e.g., 69.8kΩ for 3.3V-with R2 held constant at 22.1kΩ. No firmware or programming is required.

Does the AP62200WU-EVM include thermal management features?

Yes-the PCB uses 2oz copper on both layers, thermal vias under U1 (TSOT26), and a dedicated thermal pad connected to internal ground planes. The board sustains 2A continuous output at +85°C ambient without forced airflow, per thermal imaging in the design validation report.

Can the AP62200WU-EVM be used to evaluate efficiency at light load?

Yes-its 135µA quiescent current and COT control enable accurate light-load efficiency measurement down to 1mA. Input current is measured in-series with the supply; output current is set via electronic load. Measurement guidelines specify ammeter placement and probe grounding to minimize noise.