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Type 3 IEEE802.3bt-ready active clamp forward converter PoE powered device reference design
TIDA-050045
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Key Document

Description

This TI reference design showcases a Type-3, Class 6, 51-W active clamp forward converter for powered devices (PD) through PoE. The TPS23730 PD controller provides detection and classification while also containing a PWM controller. This design takes in a 37-V to 57-V PoE input, and outputs a 5-V rail for applications such as IP network cameras and wireless access points. 

Features
  • IEEE802.3bt Type 3 compliant PoE PD
  • Integrated PWM controller for flyback or active clamp forward congifuration
  • Frequency dithering for EMI reduction
  • Soft-start control with advanced startup and hiccup mode overload protection
  • Automatic maintain power signature (MPS)
  • Soft-stop shutdown

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Schematic/Block Diagram

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Design Guide

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Design Files

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TI Devices (4)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
CSD18503Q5A  40-V, N channel NexFET™ power MOSFET, single SON 5 mm x 6 mm, 4.3 mOhm  MOSFETs  Sample & Buy Not Available
CSD19538Q2  100-V, N channel NexFET™ power MOSFET, single SON 2 mm x 2 mm, 59 mOhm  MOSFETs  Sample & Buy Not Available
TLV431  1.5% accuracy, low-voltage, adjustable precision shunt regulator  Voltage references  Sample & Buy View Design Kits & Evaluation Modules
TPS23730  IEEE 802.3bt type-3 class 1-6 PoE 2 PD with high efficiency DC-DC controller  Power over Ethernet (PoE) ICs  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
CSD18503Q5A VSONP (DQJ)| 8 Download
CSD19538Q2 WSON (DQK)| 6 Download Download
TLV431 Download Download
Download Download
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Download Download
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TPS23730 Download

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Technical documentation

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Data sheet (1)
Title Type Size (KB) Date
PDF 2357 25 Nov 2020
User guide (1)
Title Type Size (KB) Date
PDF 7747 21 Sep 2020
Design files (6)
Title Type Size (KB) Date
ZIP 940 21 Sep 2020
ZIP 5018 21 Sep 2020
PDF 1681 21 Sep 2020
PDF 455 21 Sep 2020
PDF 144 21 Sep 2020
PDF 443 21 Sep 2020

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