1.25W Isolated Flyback Converter for Analog/Digital Power
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PMP7902 is an Isolated Flyback converter utilizing the LM5001 non-synchronous current-mode regulator I.C.  The design accepts an input voltage of 4.5V to 5.5V and provides an isolated 5V output capable of supplying 0.25A of current to the load.  The design uses an off-the-shelf VERSAPAC transformer, providing 500V of operational isolation between primary and secondary.  A precision shunt regulator provides a tight control of the output voltage using an optocoupler to cross the isolation barrier.

  • Isolated output
  • Uses standard off-the-shelf transformer
  • Regulated output using precision shunt on secondary
  • Low-profile design using all ceramic capacitors
  • Integrated switching MOSFET
  • Built-in over-current protection

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Design Files

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TI Devices (2)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
LM5001  3.1-75V Wide Vin, 1A Current Mode Non-Synchronous Switch Mode Regulator  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)
LM5001 Download Download
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LMV431A Download Download
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Technical documentation

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User guide (1)
Title Type Size (KB) Date
PDF 1019 09 Apr 2015
Design files (7)
Title Type Size (KB) Date
ZIP 205 09 Apr 2015
ZIP 347 09 Apr 2015
PDF 205 09 Apr 2015
PDF 101 09 Apr 2015
PDF 67 09 Apr 2015
PDF 104 09 Apr 2015
PDF 114 09 Apr 2015

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