Diodes Incorporated AP3012K-EVM

Overview

AP3012K-EVM from Diodes Incorporated is an evaluation board for the AP3012KTR step-up DC/DC converter, designed to demonstrate 1.5MHz boost operation with adjustable 24V output at up to 30mA load, integrated 36V/500mA bipolar switch, and built-in overvoltage protection (29V threshold). It supports rapid validation of LCD/OLED bias supply designs using a compact SOT25-packaged controller.

For engineers reviewing the AP3012K-EVM datasheet, AP3012K-EVM pinout, AP3012K-EVM application, or AP3012K-EVM equivalent, this board enables fast functional verification of high-frequency boost conversion, OVP response timing, soft-start behavior, and efficiency vs. load performance under real-world thermal and layout conditions.

Technical Context

The AP3012K-EVM implements a current-mode PWM boost topology centered on the AP3012KTR IC, operating at a fixed 1.5MHz switching frequency to minimize external inductor size (10µH, 3.0×3.0×2.0mm). Input voltage range is 2.6V–16V, supporting common USB and battery-powered sources.

Board-level features include test points for VIN, VOUT, SHDN, and SW signals; jumper-controlled enable (JH6); and discrete components optimized per Diodes' recommended layout-C1/C4 ceramic output caps (1µF/35V, 1µF/25V), C3 bypass cap (0.1µF), and Schottky flyback diode (B140B-13-F).

Key Specifications

Availability

AP3012K-EVM is available at Aetrix Electronics and suitable for LCD/OLED display bias supply validation, white LED backlight characterization, and portable power architecture prototyping requiring stable component supply and fast-turn evaluation support.

Supply support for AP3012K-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 automotive markets.

The AP3012 product line delivers high-frequency, rugged boost converters targeting space-constrained portable displays and low-power bias rails where thermal efficiency and OVP reliability are critical design requirements.

FAQ

What input voltage range is validated for the AP3012K-EVM?

The AP3012K-EVM is validated with a 5V input per the Quick Start Guide, but supports the full AP3012KTR operating range of 2.6V to 16V. Input stability and efficiency across this range can be measured using the VIN and GND terminals and an inline ammeter as specified in the Measurement Guidelines section.

How is output voltage adjusted on the AP3012K-EVM?

Output voltage is set by the FB resistor divider formed by R1 (180kΩ) and R2 (10kΩ), yielding a nominal 24V output. To adjust, replace R1 or R2 per the AP3012KTR transfer function: VOUT = 0.6V × (1 + R1/R2). The board provides solder pads for alternative resistor placement without requiring PCB modification.

Does the AP3012K-EVM include overvoltage protection testing capability?

Yes - the AP3012KTR's internal 29V overvoltage protection is active on the EVM. When VOUT exceeds 29V (e.g., under light/no-load conditions or FB divider fault), the IC shuts down. Recovery occurs after input cycle or EN toggle. This behavior can be observed at the SW node using an oscilloscope during overvoltage stress tests.

Can the AP3012K-EVM be used to evaluate efficiency under varying loads?

Yes - the board supports efficiency measurement per the Performance Guidelines: place an ammeter in series with VIN to measure input current, connect an electronic load to VOUT/GND for controlled output current, and calculate η = (VOUT × IOUT)/(VIN × IIN). Test points VOUT_S and GND allow low-noise ripple and voltage readings.