13.2W (4A) Isolated Flyback Converter Reference Design


Design files


PMP10632 is an isolated flyback converter reference design using the LM5020-2 controller IC. The reference design accepts an input voltage of 36Vin to 75Vin (48Vin nominal) and provides an isolated output of 3.3Vout, capable of supplying 4A of continuous current to the load. The nominal switching frequency of the design is approximately 250 KHz. All tests for this report were performed at 36Vin, 48Vin, and 75Vin. The board is a 2-layer PCB with 1oz. copper.

  • Primary-to-secondary isolation
  • Second stage output filter for lower output voltage ripple and lower RMS currents
  • Low temperature rise
  • Cycle-by-cycle current limit
Output voltage options PMP10632.1
Vin (Min) (V) 36
Vin (Max) (V) 75
Vout (Nom) (V) 3.3
Iout (Max) (A) 4
Output Power (W) 13.2
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.

TIDUDX1.PDF (1312 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


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

TIDCE32.ZIP (189 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.

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

LM502013-100V Wide Vin, Current Mode PWM Boost, Flyback, Sepic Controller

Data sheet: PDF
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 PMP10632 Test Results Nov. 30, 2017

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