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MAXREFDES1084: Miniature 12W DC-DC Flyback Converter Using the MAX17596

MAXREFDES1084

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Reference Guide

Description

The MAXREFDES1084 is a miniature, 24V output, isolated power supply that can deliver up to 0.5A of load current. The design uses the MAX17596 peak-currentmode controller in discontinuous-conduction mode (DCM) flyback topology running at 125kHz. The input voltage range of the MAX17596 is 4.5V to 36V. However, an extra bias winding from the transformer is used to power the controller. This allows the input operating voltage to go up to 60V for this design.

The transformer provides a galvanic isolation of 1500VRMS between the primary and the secondary. In addition, an optocoupler is used to provide secondary-side feedback to the controller for voltage regulation while maintaining isolation. This document also discusses a step-by-step procedure to implement this reference design and presents design equations for the calculation of all the design parameters. These equations show how to calculate the component values to allow users to modify this design for their applications. Key features of the MAXREFDES1084 are as follows:

Features

  • Miniature Design Optimized for Small Size
  • 17V to 60V Input Range
  • Isolated Output of 24V DC at 12W
  • Cycle-by-Cycle Current Limit
  • Resistor-Programmable UVLO/OVI Threshold
  • Low-Cost DCM Flyback Design
  • Galvanic Isolation Up to 1500VRMS
  • Proven PCB Layout
  • Fully Assembled and Tested

  • Miniature 12W DC-DC Flyback Converter Using the MAX17596

    The MAXREFDES1084 is a miniature, 24V output, isolated power supply that can deliver up to 0.5A of load current. The design uses the MAX17596 peak-currentmode controller in discontinuous-conduction mode (DCM) flyback topology running at 125kHz. Miniature 12W DC-DC Flyback Converter Using the MAX17596

  • Miniature 12W DC-DC Flyback Converter Using the MAX17596

    The MAXREFDES1084 is a miniature, 24V output, isolated power supply that can deliver up to 0.5A of load current. The design uses the MAX17596 peak-currentmode controller in discontinuous-conduction mode (DCM) flyback topology running at 125kHz. Miniature 12W DC-DC Flyback Converter Using the MAX17596

The MAXREFDES1084 is a miniature, 24V output, isolated power supply that can deliver up to 0.5A of load current. The design uses the MAX17596 peak-currentmode controller in discontinuous-conduction mode (DCM) flyback topology running at 125kHz.

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Designed, Built, Tested

Board pictured here has been fully assembled and tested. Not available for sale.

 

Parametrics

Input Type Vin(Min) Vin(Max) Iout(Max) Single/Multiple Output Vout(V) Pout(W) Isolated/Non-Isolated Topology
DC 17 60 0.5 - 24 12 Isolated Flyback

Parametrics

Input Type DC
Vin(Min) 17
Vin(Max) 60
Iout(Max) 0.5
Single/Multiple Output -
Vout(V) 24
Pout(W) 12
Isolated/Non-Isolated Isolated
Topology Flyback

Maxim Devices (1)

Part Number Name Product Family Order Design kits and evaluation modules
MAX17596 Peak-Current-Mode Controllers for Flyback and Boost Regulators Isolated Power Buy Now Design Kits

Maxim Devices (1)

Part Number Product Family
Isolated Power
Peak-Current-Mode Controllers for Flyback and Boost Regulators

Design Files (4)

Title Type Size Date
maxrefdes1084-bom PDF 713KB 2020-02-17
maxrefdes1084-pcb PDF 676KB 2020-02-17
maxrefdes1084-schematic PDF 24KB 2020-02-17
TTS MAXREFDES Test Results Template_Rev 0_0318 PDF 558KB 2020-02-17
Date Type
2020-02-17

maxrefdes1084-bom

(PDF, 713KB)

2020-02-17

maxrefdes1084-pcb

(PDF, 676KB)

2020-02-17

maxrefdes1084-schematic

(PDF, 24KB)

2020-02-17

TTS MAXREFDES Test Results Template_Rev 0_0318

(PDF, 558KB)

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