40-W, ±15-V flyback with magnetic feedback reference design


Design files


This reference design generates an isolated ±15 V at 40 W from a 70-V to 120-V DC input voltage. The design uses a magnetic feedback circuit to replace the function of an optocoupler.

  • Use of 100-krad integrated circuits and magnetics
  • Magnetic feedback used to replace the optocoupler
  • Operation with external supply or self bias
Output voltage options PMP22680.1
Vin (Min) (V) 70
Vin (Max) (V) 120
Vout (Nom) (V) 15
Iout (Max) (A) 2.133
Output Power (W) 31.995
Isolated/Non-Isolated Isolated
Input Type DC
Topology Flyback- DCM

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.

TIDT269.PDF (1248 K)

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


Detailed schematic diagram for design layout and components


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


Detailed overview of design layout for component placement

TIDMAA7.ZIP (1234 K)

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

TIDCG59.ZIP (697 K)

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


PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.


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Technical documentation

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Type Title Date
Test report 40-W, ±15-V Flyback With Magnetic Feedback Reference Design PDF | HTML Apr. 06, 2022

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