High-Efficiency Isolated Flyback Converter Reference Design for PoE Application
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PMP9446 is an Isolated Flyback Converter using the LM5022 controller IC. The design accepts an input voltage of 10Vin to 15Vin (12Vin Nominal) and provides an output of 54Vout capable of supplying 0.75A of continuous current to the load. The design was built on the PMP7899 PCB, which was modified to the PMP9446 design configuration and requirements.


  • Isolated Input/Output for Safety
  • High Power Density: 40W/5.6 Sq. inches
  • Small Solution Size
  • High Step-Up Ratio
  • Small device package size
  • Voltage Reference Accuracy of ±1%

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Schematic/Block Diagram

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Design Files

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(Output Voltage 1)
Vin (Min) (V)10
Vin (Max) (V)15
Vout (Nom) (V)54
Iout (Max) (A).75
Output Power (W)40.5
Input TypeDC
TopologyFlyback- Non Sync

TI Devices (2)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
LM5022  6-60V Wide Vin, current mode boost, SEPIC and Flyback controller  Step-up (boost) regulators  Sample & Buy View Design Kits & Evaluation Modules
LMV431A  1%, low-voltage (1.24-V) adjustable precision shunt regulator  Voltage references  Sample & Buy Not Available

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
LM5022 Download Download
LMV431A Download Download
Download Download

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Technical documentation

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User guide (1)
Title Type Size (KB) Date
PDF 721 19 Jun 2015
Design files (6)
Title Type Size (KB) Date
ZIP 182 16 Jul 2015
ZIP 418 16 Jul 2015
PDF 399 16 Jul 2015
PDF 108 16 Jul 2015
PDF 132 16 Jul 2015
PDF 333 16 Jul 2015

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