Dual-input redundant PoE PD with smooth transition reference design
PMP20859
This product has been released to the market and is available for purchase. For some products, newer alternatives may be available.

Description & Features

Technical Documents

Support & Training

Order Now


See the Important Notice and Disclaimer covering reference designs and other TI resources.

Key Document

Description

This reference design implements an IEEE802.3bt (draft) Power over Ethernet (PoE) Powered Device (PD) with dual redundant inputs and a smooth transition between these inputs and an auxiliary input.  The design consists of a 5V/6A synchronous flyback converter and allows for up to three power supplies (two PoE Power Source Equipment (PSE) supplies and one AC/DC wall adapter auxiliary supply) to be used in order to decrease the probability of power and data loss in your system.

In need of an IEEE802.3bt-ready PSE controller? Check out the TPS23881.

Features
  • Redundant inputs:  two PoE and 48V adapter
  • Continuous output when switching between inputs
  • 84% efficiency with 5V/6A output and PoE input

See the Important Notice and Disclaimer covering reference designs and other TI resources.


  



Schematic/Block Diagram

Quickly understand overall system functionality.

Download Schematic

Design Guide

Get results faster with test and simulation data that's been verified.

Download Design Guide

Design Files

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

Download Design Files


Parametrics
 PMP20859.1
(Output Voltage 1)
Vin (Min) (V)42.5
Vin (Max) (V)57
Vout (Nom) (V)5
Iout (Max) (A)6
Output Power (W)30
Isolated/Non-IsolatedIsolated
Input TypeDC
TopologyFlyback- Synchronous
POE

TI Devices (7)

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
CSD18504Q5A  40V, N ch NexFET MOSFET™, single SON5x6, 6.6mOhm  MOSFETs  Sample & Buy View Design Kits & Evaluation Modules
CSD19534Q5A  100V, N ch NexFET MOSFET™, single SON5x6, 15.1mOhm  MOSFETs  Sample & Buy Not Available
CSD19538Q3A  100V, N ch NexFET MOSFET™, single SON3x3, 61mOhm  MOSFETs  Sample & Buy Not Available
LM5020  13-100V Wide Vin, Current Mode PWM Boost, Flyback, Sepic Controller  Step-up (boost)  Sample & Buy View Design Kits & Evaluation Modules
TLV431A  1% Accuracy Low-Voltage Adjustable Precision Shunt Regulator  Voltage references  Sample & Buy View Design Kits & Evaluation Modules
TPS2372  IEEE 802.3bt PoE high-power PD interface with automatic MPS & autoclass  Power over Ethernet (PoE)  Sample & Buy View Design Kits & Evaluation Modules
TPS3808  Low-quiescent current supervisor with programmable-delay and manual reset  Power management  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
CSD18504Q5A VSONP (DQJ)| 8 Download Download
CSD19534Q5A VSONP (DQJ)| 8 Download
CSD19538Q3A VSONP (DNH)| 8 Download
LM5020 Download Download
Download Download
TLV431A Download Download
Download Download
Download -
Download Download
Download -
Download Download
TPS2372 Download Download
TPS3808 Download Download
Download Download

Texas Instruments and Accelerated Designs, Inc. have collaborated together to provide TI customers with schematic symbols and PCB layout footprints for TI products.

Step 1: Download and install the free download.

Step 2: Download the Symbol and Footprint from the CAD.bxl file table.


Technical Documents

See the Important Notice and Disclaimer covering reference designs and other TI resources.

User guides (1)
Title Type Size (KB) Date
PDF 1042 21 Oct 2018
Design files (6)
Title Type Size (KB) Date
ZIP 1594 21 Oct 2018
ZIP 1410 21 Oct 2018
PDF 2119 19 Oct 2018
PDF 417 19 Oct 2018
PDF 40 19 Oct 2018
PDF 430 19 Oct 2018

Support & training

Search our extensive online knowledge base where millions of technical questions and answers are available 24/7.

Search answers from TI experts

Content is provided 'AS IS' by the respective TI and Community contributors and does not constitute TI specifications.
See terms of use.

If you have questions about quality, packaging, or ordering TI products visit our Support page.

Technical articles