25W Isolated Synchronous Flyback Reference Design PMP10541 (ACTIVE)

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Key Document


PMP10541 is an isolated synchronous flyback converter reference design which utilizes the LM5122 controller for industrial applications. The switching frequency is set to 230 kHz for high efficiency at a nominal output power of 25W. A planar power transformer provides good coupling and thermal performance. Secondary-side gate drive is coupled from the primary through a small isolation transformer.

  • Synchronous rectification to improve efficiency
  • Isolated output
  • Wide input operation
  • Planar transformer
  • 4-layer board

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(Output Voltage 1)
Vin (Min) (V)9
Vin (Max) (V)42
Vout (Nom) (V)5
Iout (Max) (A)5
Output Power (W)25
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)  Sample & Buy View Design Kits & Evaluation Modules
LMV431A  Low-Voltage (1.24V) Adjustable Precision Shunt Regulators  Voltage references  Sample & Buy Not Available

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
LM5122 Download Download
Download -
LMV431A Download Download
Download Download

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Technical Documents

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User guides (1)
Title Type Size (KB) Date
PDF 1344 06 Dec 2017
Design files (6)
Title Type Size (KB) Date
ZIP 282 06 Dec 2017
ZIP 912 06 Dec 2017
PDF 904 06 Dec 2017
PDF 156 06 Dec 2017
PDF 102 06 Dec 2017
PDF 221 06 Dec 2017

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