PMP11257

Class 4 PoE Synchronous Buck Converter (12V/2A) Reference Design

PMP11257

Design files

Overview

The LM5116 synchronous buck controller provides a high efficiency solution for non-isolated PoE PD applications.  The TPS2378 PoE PD controller performs all necessary functions for an IEEE802.3at compliant Class 4 PoE PD.  This converter is ideal for any PoE application that demands best possible efficiency and does not require isolation.

Features
  • Excellent efficiency (94% at 2A from PoE input)
  • Non-isolated
  • Small size
Output voltage options PMP11257.1
Vin (Min) (V) 42.5
Vin (Max) (V) 57
Vout (Nom) (V) 12
Iout (Max) (A) 2
Output Power (W) 24
Isolated/Non-Isolated Non-Isolated
Input Type DC
Topology Buck- Synchronous^POE

A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDUCA7.PDF (533 K)

Test results for the reference design, including efficiency graphs, test prerequisites and more

TIDRNH8.PDF (393 K)

Detailed schematic diagram for design layout and components

TIDRNH9.PDF (127 K)

Complete listing of design components, reference designators, and manufacturers/part numbers

TIDRNI0.PDF (186 K)

Detailed overview of design layout for component placement

TIDCCM0.ZIP (486 K)

Design file that contains information on physical board layer of design PCB

Products

Includes TI products in the design and potential alternatives.

Buck controllers (external switch)

LM51166-100V Wide Vin, Current Mode Synchronous Buck Controller

Data sheet document-pdfAcrobat PDF open-in-new HTML
N-channel MOSFETs

CSD17577Q3A30-V, N channel NexFET™ power MOSFET, single SON 3 mm x 3 mm, 6.4 mOhm

Data sheet document-pdfAcrobat PDF open-in-new HTML
Powered devices

TPS2378IEEE 802.3at PoE High-Power PD interface with AUX Control

Data sheet document-pdfAcrobat PDF open-in-new HTML

Technical documentation

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Type Title Date
* Test report PMP11257 Test Results Sep. 06, 2016

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