Class 3 Synchronous Flyback Converter (3.7V/2.9A) PoE Reference Design
PMP20931
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Description & Features

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Key Document

Description

The PMP20931 reference design is a high efficiency synchronous flyback converter with a 36-57Vdc PoE input and an isolated 3.7V/2.9A output.  The TPS23753A contains both the PoE PD controller and PWM controller, saving size and cost.  This design ideally suited for any PoE application such as an IP phone or wireless access point.

Features
  • 87% efficiency at 2.9A load
  • 1500VRMS isolation
  • Small size (2.0 x 2.3 inches)

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Schematic/Block Diagram

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Design Guide

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Design Files

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Parametrics
 PMP20931.1
(Output Voltage 1)
Vin (Min) (V)36
Vin (Max) (V)57
Vout (Nom) (V)3.7
Iout (Max) (A)29
Output Power (W)107.3
Isolated/Non-IsolatedIsolated
Input TypeDC
TopologyFlyback- Synchronous
POE

TI Devices (3)

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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

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
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TPS23753A Download Download

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Technical documentation

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User guides (1)
Title Type Size (KB) Date
PDF 702 20 Sep 2017
Design files (6)
Title Type Size (KB) Date
ZIP 408 20 Sep 2017
ZIP 701 20 Sep 2017
PDF 784 20 Sep 2017
PDF 139 20 Sep 2017
PDF 34 20 Sep 2017
PDF 150 20 Sep 2017

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