3.5-W automotive dual-output PSR flyback regulator reference design
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Key Document


This reference design showcases a dual output primary-side regulated flyback converter, which covers an input voltage range of 8.0 V to 36 V. The output voltage of the two isolated outputs is 17.5 V each with a maximum load current of 100 mA.

  • Power stage withstands surge voltages up to 36 V
  • Input filter decreases the reflected ripple
  • Two separately isolated outputs increases the range of applications
  • Primary-side regulation and integrated FET reduces the bill of materials

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(Output Voltage 1)
(Output Voltage 2)
Vin (Min) (V)88
Vin (Max) (V)1616
Vout (Nom) (V)17.517.5
Iout (Max) (A).1.1
Output Power (W)1.751.75
Input TypeDCDC
TopologyFlyback- Integrated Switch
Flyback- Non Sync
Flyback- Integrated Switch
Flyback- Non Sync

TI Devices (1)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
LM5180-Q1  Automotive 65-VIN PSR flyback converter with 100-V, 1.5-A integrated power MOSFET  Offline & isolated DC/DC controllers & converters  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
LM5180-Q1 Download Download

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Technical documentation

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User guides (1)
Title Type Size (KB) Date
PDF 1830 10 Mar 2020
Design files (6)
Title Type Size (KB) Date
ZIP 62 10 Mar 2020
ZIP 415 10 Mar 2020
PDF 295 10 Mar 2020
PDF 103 10 Mar 2020
PDF 134 10 Mar 2020
PDF 124 10 Mar 2020

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