Analog Devices Inc./Maxim Integrated MAXREFDES113D#

Overview

MAXREFDES113D# from Maxim Integrated is an isolated 24V-to-12V, 20W flyback reference design board built around the MAX17596 peak-current-mode controller. It delivers 12V at up to 1.6A (with 20% over-range current capability), achieves 87% peak efficiency at 24V input, and operates across 17V–36V input range. Its compact 20mm × 35mm through-hole layout supports rapid integration into industrial control, PLC, and telecom power systems.

For engineers reviewing the MAXREFDES113D# datasheet, MAXREFDES113D# pinout, MAXREFDES113D# application, or MAXREFDES113D# equivalent, this reference design provides verified schematics, Gerber files, transformer qualification data (Halo TGSP-P153EP13LF), load/line regulation test results, and EMI-optimized 200kHz switching with dithering - all critical for industrial power supply validation and BOM sourcing.

Technical Context

The MAXREFDES113D# implements a transformer-isolated flyback topology using the MAX17596 controller, which integrates a 1% accurate internal voltage reference and programmable 100kHz–1MHz switching frequency (set to 200kHz). Input undervoltage lockout (EN/UVLO) is configured at 17V and overvoltage protection (OVI) at 36V via external resistor dividers.

Feedback uses a TL431 shunt regulator and 3000V optocoupler for precise ±5% output regulation. Hiccup-mode overcurrent protection, thermal shutdown, and soft-start (via SS pin capacitor) ensure robust operation under fault and startup conditions in harsh industrial environments.

Key Specifications

Availability

MAXREFDES113D# is available at Aetrix Electronics and suitable for industrial control and automation, programmable logic controller (PLC) power rails, and telecom/datacom isolated auxiliary supplies requiring stable component supply, quick prototyping, and qualified transformer compatibility.

Supply support for MAXREFDES113D# 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) designs high-performance analog, mixed-signal, and power management ICs for industrial, automotive, and communications applications.

The MAXREFDES reference design series targets engineers needing validated, production-ready power architectures - specifically isolated DC-DC converters with pre-qualified magnetics, complete design files, and test data for accelerated industrial system development.

FAQ

What is the primary function of the MAXREFDES113D#?

The MAXREFDES113D# is a fully assembled, tested reference design board that implements an isolated 24V-to-12V, 20W flyback power supply. It uses the MAX17596 controller and Halo TGSP-P153EP13LF transformer to deliver regulated 12V output with functional insulation. The MAXREFDES113D# serves as a turnkey solution for validating isolated power architecture in industrial and telecom systems.

Which transformer is qualified for use with the MAXREFDES113D#?

The MAXREFDES113D# is qualified with the Halo Electronics TGSP-P153EP13LF transformer, as specified in Maxim's official ordering information. This transformer meets the design's isolation, leakage inductance, and turns-ratio requirements. Other variants (e.g., Wurth 750316112r01) are assigned to different suffixes (MAXREFDES113A#–C#) and are not validated for use with the MAXREFDES113D#.

Does the MAXREFDES113D# include design files and test data?

Yes, the MAXREFDES113D# includes complete design resources: schematic, PCB layout, Gerber files, BOM, and lab measurement reports (efficiency vs. load, ripple, transient response). These are publicly available on the Maxim/Analog Devices website under the Design Resources tab for MAXREFDES113#, enabling full design reuse and verification.

What input voltage range does the MAXREFDES113D# support?

The MAXREFDES113D# operates across a 17V to 36V DC input range, with EN/UVLO set to 17V and OVI protection triggered at 36V. It is optimized for 24V nominal input but maintains regulation and safety during brownout and overvoltage events - critical for ruggedized industrial power applications using the MAXREFDES113D#.

How is isolation implemented in the MAXREFDES113D#?

Isolation in the MAXREFDES113D# is achieved via a certified 3000V reinforced insulation transformer (Halo TGSP-P153EP13LF) and optocoupled feedback using a TL431 and high-voltage opto-coupler. This provides functional insulation between input and output sides, meeting safety requirements for industrial control and PLC applications where galvanic separation is mandatory.