Class 3, Cost Optimized, Isolated PoE Flyback Converter Reference Design (12V/625mA)


Design files


The PMP20531 reference design is an isolated flyback converter utilizing the TPS23753A combined PoE PD controller and PWM controller.  Diode rectification provides a cost effective design for use in PoE applications such as IP security cameras.  The input is the standard PoE voltage of 36-57V or a 24V/48V adapter.

  • Low cost diode rectifier
  • 12V/625mA output
  • 1500Vrms isolation
  • PoE input or 24V/48V adapter
Output voltage options PMP20531.1
Vin (Min) (V) 20
Vin (Max) (V) 57
Vout (Nom) (V) 12
Iout (Max) (A) .625
Output Power (W) 7.5
Isolated/Non-Isolated Isolated
Input Type DC
Topology Flyback- Non Sync^POE
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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.

TIDUDU7.PDF (1379 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

TIDCE02.ZIP (415 K)

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

TIDCE03.ZIP (745 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.

Powered devices

TPS23753AIEEE 802.3-2005 PoE interface and Isolated Converter controller with Enhanced ESD Ride-Through

Data sheet: PDF | HTML
Shunt voltage references

TL431Adjustable precision shunt regulator

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
* Test report PMP20531 Test Results Nov. 17, 2017

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