Non-Standard PoE (>25.5W) - High Efficiency Forward Converter (5V@10A) Reference Design

(ACTIVE) PMP8923

Description & Features

Technical Documents

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Description

This converter provides a high power PoE output of 5V/10A. 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 (93% with PoE supply, 92% with adapter supply)

• 5V at 10A output

• Isolated Forward with synchronous rectifier

• Uses TPS2379 combined with UCC2897A to implement a high efficiency active forward converter

• Allows an external hot swap FET for increased efficiency


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Schematic/Block Diagram

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Design Files

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Bill of Materials (BOM)

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Parametrics
 PMP8923.1
(Output Voltage 1)
Vin (Min) (V)42
Vin (Max) (V)57
Vout (Nom) (V)5
Iout (Max) (A)10
Output Power (W)50
Isolated/Non-IsolatedIsolated
Input TypeDC
TopologyForward- Active Clamp
POE

TI Devices (4)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
CSD18503Q5A  40V N-Channel NexFET™ Power MOSFET, CSD18503Q5A  MOSFETs  Sample & Buy Not Available
TL431A  1% Accuracy 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
UCC2897  Current Mode Active Clamp PWM Controller  Offline & isolated DC/DC controllers & converters  Sample & Buy Not Available

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
CSD18503Q5A VSONP (DQJ)| 8 Download
TL431A Download Download
Download Download
Download -
Download Download
Download Download
Download Download
Download Download
Download -
Download Download
TPS2379 Download
UCC2897 Download
Download

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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 659 27 Mar 2015 16
Design files (3)
Title Abstract Type Size (KB) Date Views
ZIP 251 27 Mar 2015 10
PDF 112 27 Mar 2015 20
PDF 417 27 Mar 2015 38

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