Class 3 PoE Isolated Flyback Converter/Buck POL Converter (5V/1.25A, 3.3V/1.075A) Reference Design
PMP11271
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Description & Features

Technical documentation

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Key Document

Description

The PMP11271 reference design is ideal for Class 3 PoE PD applications such as IP phones.  The TPS23753A combined PD controller/PWM controller saves cost and size by providing both functions is a single package.  The TPS62082 synchronous buck converter has integrated FETs, resulting in a small, efficient POL converter.

Features
  • Isolated 5V/1.25A output
  • Non-isolated 3.3V/1.075A POL converter
  • Small size, 1 x 2 inches
  • 5.7mm transformer height

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Schematic/Block Diagram

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Design Guide

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Design Files

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Parametrics
 PMP11271.1
(Output Voltage 1)
PMP11271.2
(Output Voltage 2)
Vin (Min) (V)364.5
Vin (Max) (V)575.5
Vout (Nom) (V)53.3
Iout (Max) (A)1.251.075
Output Power (W)6.253.5475
Isolated/Non-IsolatedIsolatedNon-Isolated
Input TypeDCDC
TopologyPOEBuck- Synchronous

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
CSD17579Q3A  30V, N ch NexFET MOSFETâ„¢, single SON3x3, 14.2mOhm  MOSFETs  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
TPS23753A  IEEE 802.3-2005 PoE interface and Isolated Converter controller with Enhanced ESD Ride-Through  Power over Ethernet (PoE) ICs  Sample & Buy View Design Kits & Evaluation Modules
TPS62082  1.2A High Efficient Step Down Converter in 2x2mm SON Package. 3.3 Vout (Min)  Step-down (buck) regulators  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
CSD17579Q3A VSONP (DNH)| 8 Download Download
TLV431A Download Download
Download Download
Download -
Download Download
Download -
Download Download
TPS23753A Download Download
TPS62082 Download Download

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Technical documentation

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User guides (1)
Title Type Size (KB) Date
PDF 900 30 Nov 2017
Design files (7)
Title Type Size (KB) Date
ZIP 787 30 Nov 2017
ZIP 366 30 Nov 2017
ZIP 785 30 Nov 2017
PDF 790 30 Nov 2017
PDF 103 30 Nov 2017
PDF 107 30 Nov 2017
PDF 216 30 Nov 2017

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