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

(ACTIVE) PMP7499

Description & Features

Technical Documents

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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

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.


  




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-Channel NexFET Power MOSFET  Power MOSFET  Sample & Buy View Design Kits & Evaluation Modules
TL431A  1% Accuracy Adjustable Precision Shunt Regulator  Voltage Reference  Sample & Buy Not Available
TPS2379  IEEE 802.3at PoE High-Power PD Interface with External Gate Driver  Power Over Ethernet (PoE)/LAN Solutions  Sample & Buy View Design Kits & Evaluation Modules
UCC2897A  Advanced Current-Mode Active Clamp PWM Controller  Offline and Isolated DC/DC Controllers and Converters  Sample & Buy View Design Kits & Evaluation Modules

Technical Documents

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.

User guides (1)
Title Abstract Type Size (KB) Date Views
PDF 495 21 Mar 2013 50
Design files (4)
Title Abstract Type Size (KB) Date Views
ZIP 344 13 May 2014 38
PDF 202 21 Mar 2013 23
PDF 141 21 Mar 2013 29
PDF 59 21 Mar 2013 136

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