15W Wide Input Voltage Isolated Flyback Converter Reference Design


Design files


PMP20127 is an isolated flyback converter reference design using the LM5022 controller IC. The design accepts an input voltage of 9VDCin to 125VDCin and provides an output of 5Vout capable of supplying 3A of maximum current to the load. The nominal switching frequency of the design is approximately 325KHz. The design is built on the PMP9253 PCB, which is a 4-layer FR-4 board with 1 oz. copper for the top and bottom layers and 0.5 oz. copper for the two inner layers.

  • Wide input voltage range
  • Primary-to-secondary isolation
  • Cycle-by-cycle current limit
Output voltage options PMP20127.1
Vin (Min) (V) 9
Vin (Max) (V) 125
Vout (Nom) (V) 5
Iout (Max) (A) 3
Output Power (W) 15
Isolated/Non-Isolated Isolated
Input Type DC
Topology 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.

TIDUDY8.PDF (1259 K)

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

TIDRU66.PDF (132 K)

Detailed schematic diagram for design layout and components

TIDRU67.PDF (101 K)

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

TIDRU68.PDF (113 K)

Detailed overview of design layout for component placement

TIDRU70.ZIP (541 K)

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

TIDCE61.ZIP (238 K)

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

TIDRU69.PDF (555 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

AC/DC & DC/DC controllers (external FET)

LM50226-60V Wide Vin, current mode boost, SEPIC and Flyback controller

Data sheet: PDF | HTML
Shunt voltage references

LMV431A1%, low-voltage (1.24-V) adjustable precision shunt regulator

Data sheet: PDF

Technical documentation

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Type Title Date
* Test report PMP20127 Test Results Dec. 06, 2017

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