8 to 18Vin 48Vout @ 1A Single-Phase Isolated Flyback Converter Reference Design
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Key Document


PMP7899 is an isolated flyback converter utilizing the LM5022 for industrial applications. This design has a minimum operating input voltage of 8V and a maximum input voltage of 18V. A custom flyback transformer from Coilcraft is used in this design.

  • Isolated output for safety
  • High power density : 48W/5.6 Sq. inches
  • Small solution size
  • High step-up ratio
  • Excellent line and load regulation with opto-coupler
  • Cycle-by-Cycle current limit

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Schematic/Block Diagram

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(Output Voltage 1)
Vin (Min) (V)8
Vin (Max) (V)18
Vout (Nom) (V)48
Iout (Max) (A)1
Output Power (W)48
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
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Technical documentation

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User guide (1)
Title Type Size (KB) Date
PDF 1584 01 Oct 2015
Design files (6)
Title Type Size (KB) Date
ZIP 260 01 Oct 2015
ZIP 512 01 Oct 2015
PDF 893 01 Oct 2015
PDF 131 01 Oct 2015
PDF 73 01 Oct 2015
PDF 298 01 Oct 2015

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