Type-3 IEEE802.3bt-ready flyback converter PoE powered device reference design
TIDA-050023
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Key Document

Description

This design showcases a low cost, Type-3, Class 6, 51W flyback converter for powered devices through Power over Ethernet. The TPS2373-3 PD controller provides detection and classification while also powering up the LM51551-Q1 PWM controller through its advanced startup feature. This design takes in a 42V-57V PoE input and outputs a 12V rail for applications such as IP network cameras and wireless access points.

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

Features
  • Supports power levels for IEEE802.3bt Type 3
  • Isolated diode rectified flyback design
  • Built in hiccup mode protection for superior thermal performance during faults
  • PD Advanced Startup for PWM controller
  • Automatic Maintain Power Signature (MPS)
  • Oring circuit for auxiliary power through AC/DC

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Schematic/Block Diagram

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Test Data

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Design Files

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Parametrics
 TIDA-050023.1
(Output Voltage 1)
Vin (Min) (V)42
Vin (Max) (V)57
Vout (Nom) (V)12
Iout (Max) (A)4.25
Output Power (W)51
Isolated/Non-IsolatedIsolated
Input TypeDC
TopologyFlyback- Non Sync

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
LM5155  2.2MHz wide VIN non-synchronous boost controller  Step-up (boost) regulators  Sample & Buy View Design Kits & Evaluation Modules
LM5155-Q1  2.2MHz wide VIN non-synchronous boost/SEPIC/flyback controller  Step-up (boost) regulators  Sample & Buy View Design Kits & Evaluation Modules
TL431LI  Adjustable precision shunt regulator with optimized reference current (pin layout: KRA)  Voltage references  Sample & Buy Not Available
TPS2373  IEEE 802.3bt PoE high-power PD interface with advanced startup  Power over Ethernet (PoE) ICs  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
LM5155 Download Download
LM5155-Q1 Download Download
TL431LI Download Download
TPS2373 Download Download

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Technical documentation

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User guides (1)
Title Type Size (KB) Date
PDF 15666 18 Oct 2018
Design files (6)
Title Type Size (KB) Date
PDF 362 07 Dec 2018
PDF 1558 07 Dec 2018
ZIP 713 07 Dec 2018
PDF 286 07 Dec 2018
ZIP 2327 07 Dec 2018
PDF 37 07 Dec 2018
Related Tools & Software

Reference Designs (1)

Hardware development (1)

Name Part Number Tool Type
TPS2373-4 Evaluation Module for IEEE802.3bt PoE PD Applications  TPS2373-4EVM-758  Evaluation boards 

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