Analog Devices Inc./Maxim Integrated MAXREFDES112D#

Overview

MAXREFDES112D# from Maxim Integrated is an isolated 24V-to-12V, 10W flyback power supply reference design built around the MAX17596 peak-current-mode controller. It delivers 12V at up to 800mA (±5% output accuracy) with 88% peak efficiency at 24V input, features functional insulation, and uses Halo Electronics TGSP-P145EP10LF transformer. It targets industrial control systems requiring compact, through-hole-mountable, tested power conversion.

For engineers reviewing the MAXREFDES112D# datasheet, MAXREFDES112D# pinout, MAXREFDES112D# application, or MAXREFDES112D# equivalent, this reference design provides verified schematics, layout files, Gerber data, and lab-tested performance metrics-including load/line regulation, transient response (200–240mV), and 110mV_P-P output ripple-enabling rapid integration into PLCs, process controllers, and telecom power subsystems.

Technical Context

The MAXREFDES112D# implements a wide-input (17V–36V) isolated flyback topology using the MAX17596 controller, which integrates a 1% accurate internal voltage reference and programmable switching frequency (set to 500kHz). It employs optocoupler-based feedback with TL431 for precise 12V regulation across load and line variations.

Protection features include EN/UVLO (17V startup), OVI (36V shutdown), soft-start via SS pin capacitor, hiccup-mode overcurrent protection, and thermal shutdown. Transformer selection is simplified by qualification of four vendor parts-including Halo TGSP-P145EP10LF for MAXREFDES112D#-with standardized footprints and isolation ratings.

Key Specifications

Availability

MAXREFDES112D# is available at Aetrix Electronics and suitable for industrial control and automation, programmable logic controller (PLC) auxiliary power, and telecom/datacom isolated bias supply applications requiring stable component supply, full documentation, and production-ready validation.

Supply support for MAXREFDES112D# 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 precision analog, mixed-signal, and power management ICs for industrial, automotive, and communications systems.

The MAXREFDES series delivers fully validated, application-specific power reference designs-like MAXREFDES112D#-to accelerate development of robust, isolated DC-DC converters for harsh industrial environments.

FAQ

What is the input voltage range supported by the MAXREFDES112D#?

The MAXREFDES112D# operates over a 17V to 36V DC input range, with undervoltage lockout set at 17V and overvoltage protection at 36V. This accommodates nominal 24V industrial supplies with wide tolerance and ensures reliable startup and fault shutdown. The MAXREFDES112D# maintains regulation and efficiency across this full range, as verified in lab testing.

Does the MAXREFDES112D# include complete design files and test data?

Yes, the MAXREFDES112D# includes fully assembled hardware plus downloadable schematics, PCB layout files, Gerber data, BOM, and lab measurement reports-including efficiency curves, output ripple (110mV_P-P), and transient response (200–240mV spikes). All resources are publicly available from Maxim's reference design center for MAXREFDES112D#.

Which transformer is qualified for the MAXREFDES112D#?

The MAXREFDES112D# is qualified with the Halo Electronics TGSP-P145EP10LF transformer. This part provides reinforced isolation, fits the board's footprint, and enables the design's 88% peak efficiency and 3000V_RMS input-output isolation rating. Other variants (A/B/C) use different transformers, but MAXREFDES112D# specifically uses Halo's model.

What protection features does the MAXREFDES112D# implement?

The MAXREFDES112D# incorporates EN/UVLO (17V startup), OVI (36V shutdown), soft-start (via SS pin capacitor), hiccup-mode overcurrent protection, and thermal shutdown. These functions are implemented using the MAX17596 controller and discrete components on the board, ensuring safe operation during faults without external supervision. All protections are validated per MAXREFDES112D# test reports.

Can the MAXREFDES112D# be used in safety-certified systems?

The MAXREFDES112D# provides functional insulation and 3000V_RMS isolation, meeting basic insulation requirements for many industrial applications. However, it is not pre-certified to IEC/UL 62368 or similar standards. System-level certification requires additional evaluation of creepage/clearance, enclosure, and end-equipment testing. MAXREFDES112D# serves as a validated starting point-not a drop-in certified module.