Class 8 high power PoE isolated active clamp forward converter (24V/3A) reference design PMP20878 (ACTIVE)

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Key Document

Description

This reference design is a high power PoE Powered Device (PD) plus active clamp forward converter.  The TPS2373 high power PD controller EVM (TPS2373-4EVM-758) provides all functions necessary to implement an IEEE802.3bt-ready PD.  This is paired up with an active clamp forward converter utilizing the UCC2897A controller.  The high efficiency 24V/3A output using synchronous rectifiers is ideally suited for high power PoE applications such as  IP security cameras and LED lighting applications.

In need of an IEEE802.3bt-ready PSE controller? Check out the TPS23880.

Features
  • Class 8 IEEE802.3bt-ready PoE PD
  • Automatic MPS
  • Advanced start-up
  • Synchronous rectifiers for high efficiency (92% at 3A)
  • 1500VRMS isolation

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Schematic/Block Diagram

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Design Guide

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Parametrics
 PMP20878.1
(Output Voltage 1)
Vin (Min) (V)40
Vin (Max) (V)57
Vout (Nom) (V)24
Iout (Max) (A)3
Output Power (W)72
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
CSD19534Q5A  100V, N-Channel NexFET Power MOSFET  MOSFETs  Sample & Buy Not Available
TL431  Adjustable precision shunt regulator  Voltage references  Sample & Buy Not Available
TPS2373  IEEE 802.3bt PoE high-power PD interface with advanced startup  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)
CSD19534Q5A VSONP (DQJ)| 8 Download
TL431 Download Download
Download Download
Download -
Download Download
Download Download
Download Download
Download Download
Download -
Download Download
TPS2373 Download 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 1046 19 Jun 2017
Design files (2)
Title Type Size (KB) Date
PDF 39 11 Apr 2019
PDF 410 11 Apr 2019
Related Tools & Software

Design Kits & Evaluation Modules  ( 1 )

Name Part Number Tool Type
TPS2373-4 Evaluation Module for IEEE802.3bt PoE PD Applications  TPS2373-4EVM-758  Evaluation Modules & Boards 

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