Diodes Incorporated AP62800SJ-EVM

Overview

AP62800SJ-EVM from Diodes Incorporated is an evaluation module for the AP62800 4.5V–17V input, 8A synchronous buck converter IC. It implements a fully integrated power stage with 22mΩ high-side and 10mΩ low-side MOSFETs, supports selectable switching frequencies (400/800/1200kHz), operates in PFM/USM/PWM modes, and delivers regulated 5V output at up to 8A for FPGA/DSP point-of-load applications.

For engineers reviewing the AP62800SJ-EVM datasheet, AP62800SJ-EVM pinout, AP62800SJ-EVM application, or AP62800SJ-EVM equivalent, this board enables rapid validation of EMI-optimized DC-DC conversion, soft-start sequencing, power-good monitoring, and multi-mode efficiency trade-offs under real load transients and input line variations.

Technical Context

The AP62800SJ-EVM hosts the AP62800 IC in a V-QFN2030-12 (Type A) package and implements the typical application circuit per DS44688 Rev. 1–2, including 1.2μH power inductor, four 22μF output capacitors, 221kΩ/30.1kΩ FB divider, 1μF VCC bypass, and 100nF BST capacitor. It supports all three operation modes (PFM, USM, PWM) and frequency selections via MODE/FSEL jumpers.

Board-level design incorporates optimized PCB layout for thermal management (θJA = 40°C/W) and EMI reduction: dedicated PGND plane, Kelvin GND connection, minimized SW loop area, and controlled BST-SW routing. The module provides test points for VIN, VOUT, EN, PG, SS/TR, and SW nodes to support dynamic waveform capture and stability analysis.

Key Specifications

Availability

AP62800SJ-EVM is available at Aetrix Electronics and suitable for FPGA power delivery, consumer audio supply validation, network system PoL testing, and industrial embedded DC-DC design requiring stable component supply and full-feature evaluation capability.

Supply support for AP62800SJ-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-efficiency power management, signal integrity, and protection solutions for industrial, computing, and consumer markets.

The AP62800 product line targets high-current, low-noise point-of-load conversion in space-constrained systems, with emphasis on EMI compliance, multi-mode efficiency, and simplified design-in through integrated power stages and COT control.

FAQ

What input voltage range does the AP62800SJ-EVM support?

The AP62800SJ-EVM supports 4.5V to 17V DC input, matching the AP62800 IC's operating range. It is configured with input capacitors rated for 25V and designed for stable operation across 5V and 12V bus supplies. Input overvoltage protection is not implemented on the EVM; external TVS or fuse coordination is recommended for field use.

How do I configure the AP62800SJ-EVM for PWM-only operation?

To enable PWM-only mode, install a jumper between the MODE test point and the VCC rail (3.3V or 5V source). This pulls MODE to logic high, disabling PFM and ultrasonic modes. The board includes labeled pads and silkscreen indicators for MODE and FSEL configuration, and the default state (unpopulated) sets USM mode.

Does the AP62800SJ-EVM include thermal monitoring or reporting features?

No - the AP62800SJ-EVM does not integrate temperature sensors or telemetry circuitry. However, the AP62800 IC itself includes thermal shutdown at +160°C with +30°C hysteresis, and the EVM's copper-filled PGND plane and exposed pad mounting allow direct IR measurement of the IC die temperature during operation.

Can the AP62800SJ-EVM be used to evaluate output voltage tracking?

Yes - the SS/TR pin is accessible via test point and supports external tracking by connecting a reference voltage source through a resistor divider. When left floating, the IC uses internal 1ms soft-start; when biased, it enables precise sequencing with other rails. The EVM's schematic and layout preserve the required low-impedance path for tracking accuracy.