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  • Triple Output PSR Flyback Converter Reference Design

    • TIDT420 March   2025

       

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  • Triple Output PSR Flyback Converter Reference Design
  1.   1
  2.   Description
  3.   Features
  4.   Applications
  5. 1Test Prerequisites
    1. 1.1 Voltage and Current Requirements
    2. 1.2 Considerations
    3. 1.3 Dimensions
  6. 2Testing and Results
    1. 2.1 Efficiency Graphs
    2. 2.2 Efficiency Data
    3. 2.3 Thermal Images
  7. 3Waveforms
    1. 3.1 Switching
    2. 3.2 Load Transients
      1. 3.2.1 Output Volage 1
      2. 3.2.2 Output Voltage 2
      3. 3.2.3 Output Voltage 3
    3. 3.3 Start-up Sequence
  8. IMPORTANT NOTICE
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Test Report

Triple Output PSR Flyback Converter Reference Design

Description

This reference design showcases a primary-side regulation (PSR) flyback converter based on the LM5185-Q1. The design offers three isolated output windings, delivering up to 19W in total from a 6V to 27V input voltage range.

Features

  • Low component count due to primary side regulation
  • No optocoupler required
  • Good line and load regulation
  • Good cross regulation
  • High efficiency

Applications

  • Onboard charger
  • Traction inverter
PMP31345 Top PhotoTop Photo
PMP31345 Bottom PhotoBottom Photo

 
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