Analog Devices Inc./Maxim Integrated MAX5069AEVKIT

Overview

MAX5069AEVKIT from Maxim Integrated is an evaluation kit for the MAX5069A high-frequency current-mode PWM controller with dual MOSFET drivers, designed for isolated/nonisolated push-pull and half/full-bridge AC-DC/DC-DC power supplies. It supports 85–265VAC or 36–72VDC input, features programmable 50kHz–2.5MHz oscillator, 50% max duty cycle per driver, and operates across –40°C to +125°C.

For engineers reviewing the MAX5069AEVKIT datasheet, MAX5069AEVKIT setup guide, MAX5069AEVKIT test configuration, or MAX5069AEVKIT compatible controller alternatives, this kit enables rapid validation of MAX5069A-based power supply designs-including UVLO startup sequencing, slope compensation tuning, dead-time optimization, and hiccup-mode fault response-under real-world load and line transient conditions.

Technical Context

The MAX5069AEVKIT implements a fully assembled, tested reference design for the MAX5069A controller in a nonisolated push-pull topology. It integrates all critical support circuitry: RT resistor for 500kHz switching, DT network for 60ns dead time, SCOMP capacitor for slope compensation, and FLTINT RC network for integrating fault protection with 2.8V shutdown / 1.6V restart thresholds.

It provides direct access to all 16 pins of the MAX5069A in its thermally enhanced TSSOP-EP package, including dedicated test points for IN, VCC, REG5, NDRVA/NDRVB gate drive waveforms, CS current sense, FB feedback, COMP error amplifier output, and SYNC (configured as AGND for MAX5069A operation). The board supports primary-side regulation and includes onboard input filtering, gate drive RC snubbers, and thermal monitoring pads.

Key Specifications

Availability

MAX5069AEVKIT is available at Aetrix Electronics and suitable for telecom power supply validation, server PSU prototyping, industrial DC-DC converter development, and automotive auxiliary power module testing requiring stable component supply and full design support.

Supply support for MAX5069AEVKIT 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

Maxim Integrated (now part of Analog Devices) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for demanding industrial, automotive, and communications applications.

The MAX5069 product line delivers high-frequency, current-mode PWM controllers with integrated dual gate drivers for robust, efficient fixed-frequency power conversion in universal-input offline and telecom systems.

FAQ

What is the primary function of the MAX5069AEVKIT?

The MAX5069AEVKIT is an evaluation kit that demonstrates and validates the MAX5069A high-frequency current-mode PWM controller in a working push-pull power supply. It provides a complete, tested hardware platform-including input stage, gate drive circuitry, feedback loop, and fault protection-to accelerate design-in, performance characterization, and compliance testing of MAX5069A-based power converters.

Does the MAX5069AEVKIT support synchronization to an external clock?

Yes - the MAX5069AEVKIT exposes the SYNC pin of the MAX5069A device and includes a pull-down resistor to AGND by default. To enable synchronization, users can remove the pull-down and connect an external clock source meeting MAX5069A's SYNC specifications: VIH ≥ 2.4V, VIL ≤ 0.4V, fSYNC ≤ 3.125MHz, and pulse width ≥ 30ns. This allows precise timing alignment in multi-phase or noise-sensitive systems.

Can the MAX5069AEVKIT be used to evaluate MAX5069B/C/D variants?

No - the MAX5069AEVKIT is specifically configured for the MAX5069A variant, including its bootstrap UVLO threshold (23.6V wake-up), SYNC functionality, and default component values optimized for 85–265VAC input. While the PCB footprint accommodates the 16-pin TSSOP-EP package common to all MAX5069 variants, key circuits like UVLO divider, HYST pin termination, and REG5 loading are not reconfigurable for B/C/D variants without hardware modification.

How does the MAX5069AEVKIT implement hiccup-mode overcurrent protection?

The MAX5069AEVKIT implements hiccup-mode protection using the MAX5069A's FLTINT pin: an internal 60µA current source charges an external capacitor during sustained overcurrent events. When FLTINT voltage reaches 2.8V, switching halts. After decay to 1.6V (via external bleed resistor), normal operation resumes. This limits average power dissipation and prevents thermal runaway during hard shorts - a behavior directly observable on the FLTINT test point.

What thermal management features does the MAX5069AEVKIT include for the MAX5069A IC?

The MAX5069AEVKIT mounts the MAX5069A in a 16-pin thermally enhanced TSSOP-EP package with the exposed paddle soldered to a large internal copper pour connected to PGND. The board includes thermal relief pads and optional heatsink mounting holes adjacent to the IC location. These features support continuous operation at full load within the –40°C to +125°C ambient range, consistent with the MAX5069A's specified junction temperature limit of +150°C.