UPOE High-Efficiency Flyback Converter (19V/2.3A) for Forced 4-Pair PoE PD Apps Reference Design


Design files


TIDA-00539 uses two TPS2378 PD controllers for a forced 4-pair UPOE solution to 51W non-standard PoE PD applications. It incorportates the UCC2897A controller in a high-efficiency, great transient response (driven) synch flyback converter capble of 19V at 2.3A.

  • Forced 4-Pair UPOE (51W)
  • 93% high efficiency (converter only)
  • Test Report is Included
  • Evaluation Board can be purchased
Output voltage options TIDA-00539.1
Vin (Min) (V) 42.5
Vin (Max) (V) 57
Vout (Nom) (V) 19
Iout (Max) (A) 2.3
Output Power (W) 43.7
Isolated/Non-Isolated Isolated
Input Type DC
Topology Flyback- Synchronous^POE

Design files & products

Design files

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

TIDU998.PDF (563 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

TIDCAC7.ZIP (2922 K)

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


Includes TI products in the design and potential alternatives.

Powered devices

TPS2378IEEE 802.3at PoE High-Power PD interface with AUX Control

Data sheet document-pdfAcrobat PDF open-in-new HTML
N-channel MOSFETs

CSD18504Q5A40-V, N channel NexFET™ power MOSFET, single SON 5 mm x 6 mm, 6.6 mOhm

Data sheet document-pdfAcrobat PDF open-in-new HTML
PWM controllers

UCC2897A110-V active clamp current mode PWM controller with P-channel clamp FET and line OV protection

Data sheet document-pdfAcrobat PDF open-in-new HTML
Shunt voltage references

TL431Adjustable precision shunt regulator

Data sheet document-pdfAcrobat PDF open-in-new HTML

Start development


Evaluation board

TPS2378EVM-602 — Dual TPS2378 PoE PD for Forced UPOE 51W High Power Four-Pair PoE Applications

The TPS2378EVM-602 evaluation module (EVM) is a fully assembled and tested circuit for evaluating the dual TPS2378 four-pair, high power 51W applications. The TPS2378EVM-602 is a Forced UPOE compliant solution that requires no software. The EVM contains header connectors for easy connection to (...)

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Technical documentation

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Type Title Date
* Test report TIDA-00539 Test Results May 20, 2015
Technical article Power over Ethernet: New applications every day Oct. 14, 2015

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