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


Design files


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
Output voltage options PMP30750.1 PMP30750.2
Vin (Min) (V) 8 8
Vin (Max) (V) 16 16
Vout (Nom) (V) 17.5 17.5
Iout (Max) (A) .1 .1
Output Power (W) 1.75 1.75
Isolated/Non-Isolated Isolated Isolated
Input Type DC DC
Topology Flyback- Integrated Switch^Flyback- Non Sync Flyback- Integrated Switch^Flyback- Non Sync
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A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDT164.PDF (1864 K)

Test results for the reference design, including efficiency graphs, test prerequisites and more

TIDM492.PDF (124 K)

Detailed schematic diagram for design layout and components

TIDM493.PDF (134 K)

Complete listing of design components, reference designators, and manufacturers/part numbers

TIDM494.PDF (103 K)

Detailed overview of design layout for component placement

TIDM496.ZIP (415 K)

Files used for 3D models or 2D drawings of IC components


Design file that contains information on physical board layer of design PCB

TIDM495.PDF (295 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

Isolated DC/DC converters & modules

LM5180-Q1Automotive 65-VIN no-opto flyback converter with 100-V, 1.5-A integrated MOSFET

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
* Test report 3.5-W Automotive Dual Output PSR Flyback Regulator Reference Design Mar. 10, 2020
More literature Isolated Power Topologies for PLC I/O Modules and Other Low-Power Applications PDF | HTML Nov. 09, 2022

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