Non-Standard (>25.5W) PoE - High Efficiency Forward Converter (12V@5A) Reference Design PMP7499 (ACTIVE)

Description & Features

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Description

This converter provides a high power PoE output of 12V/5A. The TPS2379 PD controller allows the use of an external hot swap FET for increased efficiency. The UCC2897A PWM controller is used to implement a high efficiency active clamp forward converter.

Features
  • High efficiency (90% with PoE supply, 93.6% with adapter supply)
  • 12V at 5A output
  • Isolated Forward with synchornous rectifier
  • Uses TPS2379 combined with UCC2897A to implement a high efficiency active forward converter
  • Allows an external hot swap FET for increased efficiency
  • This circuit design is full-functional tested and recommended for new designs

See the Important Notice and Disclaimer covering reference designs and other TI resources.


  



Schematic/Block Diagram

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Design Files

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Parametrics
 PMP7499.1
(Output Voltage 1)
Vin (Min) (V)42
Vin (Max) (V)57
Vout (Nom) (V)12
Iout (Max) (A)5
Output Power (W)60
Isolated/Non-IsolatedIsolated
Input TypeDC
TopologyForward- Active Clamp
POE

TI Devices (4)

Order samples, get tools and find more information on the TI products in this reference design.

Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
CSD18533Q5A  60V, N ch NexFET MOSFET™, single SON5x6, 5.9mOhm  MOSFETs  Sample & Buy View Design Kits & Evaluation Modules
TL431  Adjustable precision shunt regulator  Voltage references  Sample & Buy Not Available
TPS2379  IEEE 802.3at PoE High-Power PD Interface with External Gate Driver  Power over Ethernet (PoE)  Sample & Buy View Design Kits & Evaluation Modules
UCC2897A  Advanced Current-Mode Active Clamp PWM Controller  Offline & isolated DC/DC controllers & converters  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
CSD18533Q5A VSONP (DQJ)| 8 Download
TL431 Download Download
Download Download
Download -
Download Download
Download Download
Download Download
Download Download
Download -
Download Download
TPS2379 Download
UCC2897A Download Download
Download Download

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Technical Documents

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User guides (1)
Title Type Size (KB) Date
PDF 495 21 Mar 2013
Design files (4)
Title Type Size (KB) Date
ZIP 344 13 May 2014
PDF 202 21 Mar 2013
PDF 141 21 Mar 2013
PDF 59 21 Mar 2013

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