Analog Devices Inc./Maxim Integrated MAX22258EVKIT#

Overview

MAX22258EVKIT# from Analog Devices is a fully assembled and tested evaluation kit for the MAX22258 15W isolated H-bridge DC-DC converter IC. It operates from 5V to 36V input, delivers up to 1A output current with full-wave rectified unregulated output, and achieves >90% efficiency at 24V input across 2.2W–8.3W load range in default LLC mode. It supports galvanic isolation up to 1500VRMS and enables configuration for voltage doubler, full-wave, or half-wave rectifier topologies.

For engineers reviewing the MAX22258EVKIT# datasheet, MAX22258EVKIT# pinout, MAX22258EVKIT# application, or MAX22258EVKIT# equivalent, this page provides verified hardware specifications, jumper-configurable clocking (internal 450kHz or external), dead-time adjustment (70ns default), overcurrent limiting (650mARMS), and isolation layout validation - all critical for evaluating isolated power-supply designs.

Technical Context

The MAX22258EVKIT# implements an isolated H-bridge DC-DC converter using the MAX22258 IC, which integrates a primary-side controller, H-bridge driver, internal 450kHz oscillator, UVLO (4.65V typ), and active-low enable. It drives a Wurth 750319825 transformer (1:1 turns ratio) and uses a full-wave rectifier output stage with onboard LDO (U1, MAX17651AZT+) providing 5V logic supply.

Hardware configurability includes jumper-selectable internal/external clock (J2), enable state (J3), dead-time tuning (R13 = 28kΩ → 70ns), and overcurrent threshold (R5 = 1.2kΩ → 650mARMS). The PCB enforces ≥300mil creepage/clearance between GND and GND_ISO for 1500VRMS isolation compliance.

Key Specifications

Availability

MAX22258EVKIT# is available at Aetrix Electronics and suitable for isolated DC-DC converter evaluation, industrial power-supply prototyping, and galvanically separated sensor interface development requiring stable component supply and rapid design validation.

Supply support for MAX22258EVKIT# 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

Analog Devices, Inc. is a global semiconductor company specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision measurement and power conversion applications.

The MAX22258EVKIT# belongs to Analog Devices' isolated power evaluation platform family, designed specifically to accelerate development of compact, high-efficiency, safety-certifiable isolated DC-DC supplies for industrial automation, medical systems, and programmable logic controllers.

FAQ

What is the purpose of the MAX22258EVKIT#?

The MAX22258EVKIT# is a fully assembled evaluation platform for the MAX22258 isolated H-bridge DC-DC controller. It enables engineers to validate performance, configure operating modes (LLC/PWM), adjust protection thresholds, and verify 1500VRMS isolation layout before integrating the MAX22258 into end equipment. The MAX22258EVKIT# includes test points, jumpers, and proven PCB layout for rapid prototyping.

How do I configure the MAX22258EVKIT# for internal versus external clock operation?

Use jumper J2: short pins 1–2 to enable the internal 450kHz oscillator; leave J2 open to apply an external clock signal to TP4 (CLKI). When using external clock, the MAX22258 internally divides frequency by two to guarantee 50% duty cycle on ST1/ST2 outputs. The CLKO test point (TP2) reflects either internal oscillator frequency or applied external clock frequency depending on J2 state.

What is the default output configuration of the MAX22258EVKIT# and how can it be modified?

The MAX22258EVKIT# defaults to full-wave rectified output using D1–D4. It can be reconfigured for voltage doubler or half-wave rectifier by modifying secondary winding connections on transformer T1 - detailed in the EV kit schematic and layout documentation. The PCB provides dedicated pads and routing flexibility to support these alternate topologies without redesign.

Does the MAX22258EVKIT# include overcurrent and fault monitoring features?

Yes. The MAX22258EVKIT# implements overcurrent limiting via R5 (1.2kΩ sets 650mARMS threshold) and reports faults on the FAULT pin, which drives red LED DS1. A low FAULT signal indicates overcurrent or overtemperature condition. The MAX22258EVKIT# also includes green LED DS2 that illuminates when VL (5V logic supply) is present, confirming proper startup sequencing.

Can the MAX22258EVKIT# be used for non-isolated evaluation?

Yes. Test points TP5 (GND) and TP10 (GND_ISO) allow connection between primary and secondary ground planes. This enables non-isolated functional testing of the MAX22258 control loop and gate drive behavior while retaining full access to all signals - useful for debugging timing, dead time, and feedback response prior to isolation validation.