Class 4 high efficiency PoE flyback-synchronous converter (5V/3A) reference design
PMP20220
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Key Document

Description

This reference design utilizes the TPS23751 combination PoE PD controller and PWM controller, saving cost and size.  The synchronous flyback converter provides high efficiency for PoE applications such as wireless access points and IP phones.  The PoE PD can also supply up to 10W of primary power for auxiliary circuits.

Features
  • High efficiency (88% at 3A load)
  • 1500Vrms isolation
  • Optional 10W primary power for auxiliary circuits

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Design Files

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Parametrics
 PMP20220.1
(Output Voltage 1)
Vin (Min) (V)42.5
Vin (Max) (V)57
Vout (Nom) (V)5
Iout (Max) (A)3
Output Power (W)15
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 MOSFET™, 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
TPS23751  IEEE 802.3at PoE Interface With Flyback DC-DC Controller  Power over Ethernet (PoE)  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 -
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Download -
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TPS23751 Download Download

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Technical Documents

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User guides (1)
Title Type Size (KB) Date
PDF 972 12 Jul 2017
Design files (7)
Title Type Size (KB) Date
ZIP 879 30 Aug 2018
PDF 754 30 Aug 2018
PDF 161 30 Aug 2018
PDF 37 30 Aug 2018
PDF 206 30 Aug 2018
ZIP 781 30 Aug 2018
ZIP 458 30 Aug 2018

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