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Class 4 12V/2.5A Active Clamp Forward Converter for PoE PD Application Reference Design
PMP9563
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Key Document

Description

This reference design is a Power Over Ethernet (POE) active clamp forward converter. It features the TPS23754, which is a combination of a POE Powered Device (PD) controller and PWM controller. CSD19534Q5A FETs are used for high efficiency synchronous rectification. The input accepts standard Type 2 POE voltage of 42.5VDC-57VDC or a 36VDC-57VDC auxiliary voltage. The output power is an isolated 12VDC at 1.9A with PoE input or 12VDC at 2.5A with auxiliary input.

Features

Integrated PD and PWM controller
Power conversion efficiency of 92% at full load
Low gate charge MOSFETs for high efficiency synchronous rectification
Auxiliary power input available
Test report includes efficiency, Vout ripple, load step, turn on response, loop stability


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Schematic/Block Diagram

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Design Files

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Parametrics
 PMP9563.1
(Output Voltage 1)
Vin (Min) (V)36
Vin (Max) (V)57
Vout (Nom) (V)12
Iout (Max) (A)2.5
Output Power (W)30
Isolated/Non-IsolatedIsolated
Input TypeDC
TopologyForward- Active Clamp
POE

TI Devices (3)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
CSD19534Q5A  100-V, N channel NexFET™ power MOSFET, single SON 5 mm x 6 mm, 15.1 mOhm  MOSFETs  Sample & Buy Not Available
TL431  Adjustable precision shunt regulator  Voltage references  Sample & Buy View Design Kits & Evaluation Modules
TPS23754  IEEE 802.3at, high efficiency, PoE interface and DC/DC controller  Power over Ethernet (PoE) ICs  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
TPS23754 Download Download

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Technical documentation

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User guide (1)
Title Type Size (KB) Date
PDF 417 21 Oct 2014
Design files (3)
Title Type Size (KB) Date
ZIP 259 21 Oct 2014
PDF 105 21 Oct 2014
PDF 252 21 Oct 2014

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