9 to 60Vin 12Vout @ 5A Single-Phase Isolated Synchronous Flyback Converter Reference Design
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Key Document


PMP9256 is an isolated synchronous flyback converter utilizing the LM5122 for industrial applications. The benefit of using a synchronous flyback is higher efficiency compared to a non-synchronous flyback.

  • Synchronous rectifier for high efficiency
  • Isolated design to meet safety requirements
  • Excellent regulation with opto feedback
  • Wide input operating range
  • Voltage Reference Accuracy of +/-1%
  • Synchronizable to external Clock

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Design Files

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(Output Voltage 1)
Vin (Min) (V)9
Vin (Max) (V)60
Vout (Nom) (V)12
Iout (Max) (A)5
Output Power (W)60
Input TypeDC
TopologyFlyback- Synchronous

TI Devices (2)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
LM5122  3-65V Wide Vin, Current Mode Synchronous Boost Controller with Multiphase Capability  Step-up (boost) regulators  Sample & Buy View Design Kits & Evaluation Modules
LMV431  1.5%, low-voltage (1.24-V) adjustable precision shunt regulator  Voltage references  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
LM5122 Download Download
Download Download
LMV431 Download Download
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Technical documentation

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User guide (1)
Title Type Size (KB) Date
PDF 1819 28 Sep 2015
Design files (6)
Title Type Size (KB) Date
ZIP 1634 28 Sep 2015
PDF 1504 28 Sep 2015
PDF 224 28 Sep 2015
PDF 146 28 Sep 2015
PDF 487 28 Sep 2015
ZIP 354 28 Sep 2015

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