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PMP20878

Class 8 high power PoE isolated active clamp forward converter (24V/3A) reference design

Design files

PMP20878

Design files

Overview

This reference design is a high power PoE Powered Device (PD) plus active clamp forward converter.  The TPS2373 high power PD controller EVM (TPS2373-4EVM-758) provides all functions necessary to implement an IEEE802.3bt-ready PD.  This is paired up with an active clamp forward converter utilizing the UCC2897A controller.  The high efficiency 24V/3A output using synchronous rectifiers is ideally suited for high power PoE applications such as  IP security cameras and LED lighting applications.

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

Features
  • Class 8 IEEE802.3bt-ready PoE PD
  • Automatic MPS
  • Advanced start-up
  • Synchronous rectifiers for high efficiency (92% at 3A)
  • 1500VRMS isolation
Output voltage options PMP20878.1
Vin (Min) (V) 40
Vin (Max) (V) 57
Vout (Nom) (V) 24
Iout (Max) (A) 3
Output Power (W) 72
Isolated/Non-Isolated Isolated
Input Type DC
Topology Forward- Active Clamp^POE
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Design files & products

Design files

Download ready-to-use system files to speed your design process.

download Test report — PMP20878
TIDUDB0.PDF (1115 KB)

Test results for the reference design, including efficiency graphs, test prerequisites and more

download Bill of materials (BOM) — PMP20878
TIDRRG4A.PDF (40 KB)

Complete listing of design components, reference designators, and manufacturers/part numbers

download Schematic — PMP20878
TIDRRG3B.PDF (410 KB)

Detailed schematic diagram for design layout and components

Products

Includes TI products in the design and potential alternatives.

Shunt voltage references

TL431 — Adjustable precision shunt regulator

Data sheet: PDF | HTML
Powered devices

TPS2373 — IEEE 802.3bt PoE high-power PD interface with advanced startup

Data sheet: PDF | HTML
AC/DC controllers

UCC2897A — 110-V active clamp current mode PWM controller with P-channel clamp FET and line OV protection

Data sheet: PDF | HTML
MOSFETs

CSD19534Q5A — 100-V, N channel NexFET™ power MOSFET, single SON 5 mm x 6 mm, 15.1 mOhm

Data sheet: PDF | HTML

Start development

Hardware development

Evaluation board

TPS2373-4EVM-758 —

TPS2373-4 evaluation module for IEEE802.3bt PoE PD applications

This reference design is a high power PoE Powered Device (PD) plus active clamp forward converter.  The TPS2373 high power PD controller EVM (TPS2373-4EVM-758) provides all functions necessary to implement an IEEE802.3bt-ready PD.  This is paired up with an active clamp forward converter (...)
EVM user’s guide: PDF | HTML
Supported products & hardware

Supported products & hardware

Hardware development
Reference design
PMP20878 — Class 8 high power PoE isolated active clamp forward converter (24V/3A) reference design TIDA-050023 — Type-3 IEEE802.3bt-ready flyback converter PoE powered device reference design
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TPS2373-4EVM-758 —

TPS2373-4 evaluation module for IEEE802.3bt PoE PD applications

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Hardware development
Reference design
PMP20878 — Class 8 high power PoE isolated active clamp forward converter (24V/3A) reference design TIDA-050023 — Type-3 IEEE802.3bt-ready flyback converter PoE powered device reference design
TI’s Standard Terms and Conditions for Evaluation Items apply.

Technical documentation

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Top documentation Type Title Format options Date
* Test report PMP20878 Test Results Jun 19, 2017

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