TIDA-050026-23881

24-port (PoE 2, 4-pair) power sourcing equipment reference design for multi-port applications ;

TIDA-050026-23881

Design files

Overview

This reference design showcases a Type-4 (PoE 2, 4-Pair) 24-port Ethernet switch for Power over Ethernet (PoE) applications which can send up to 90W per port for for IEEE 802.3bt (PoE 2) applications and up to 120W per port for non-standard applications. Based on the MSP430F523x family, our FirmPSE system software for this design reduces time to market and frees-up valuable software resources by enabling real-time communication with the system and customization of firmware. This design supports power management with priority, multiple power supplies, legacy PD detection, field upgradability, UART/I2C communication with the host, and more. In addition, two of these designs may be cascaded through the edge connectors in order to support up to 48-port PSE systems.

List of Required Hardware

  • PSEMTHR24EVM-081: Mother board for 24-port IEEE 802.3bt (PoE 2) ready PSE system
  • TPS23881EVM-083: IEEE 802.3bt (PoE 2) ready PSE daughter card for 24-port PSE system
  • PSEMCUDAUEVM-082: MSP430 daughter card for 24-port IEEE 802.3bt (PoE 2) ready PSE system
  • MSP-FET: Flash tool for flashing FirmPSE app code and BSL code to MSP430
  • USB2ANY: Interface adapter to communicate between FirmPSE GUI and MSP430

List of Software to Download



Step-by-step to getting started: 

Step 1: Order hardware 

Step 2: Download the software 
  • Download the FirmPSE application code image, FirmPSE BSL code image and FirmPSE GUI here.
Step 3: Watch hardware setup and GUI tutorial videos 


Step 4: Download and review the user guides

Step 5: Review the additional design tools listed below

Hardware design filesSupport and training 

E2E Link

Related TI devices

  • TPS23881
  • TPS23882
  • MSP430F5234
  • LM5020
  • TLV431
  • INA240
  • REF3425
  • LM5050-2
  • TPS7A4001
  • TPS3890

Features
  • IEEE 802.3bt (PoE 2, 4-Pair) 24-port Ethernet switch for Power over Ethernet (PoE) applications. NOTE: For 2-Pair application click here.

  • Off-the shelf, production ready, system software solution (FirmPSE) running on an MSP430.

  • GUI for easy customization of FirmPSE and for real time communications.

Output voltage options TIDA-050026-23881.1
Vin (Min) (V) 44
Vin (Max) (V) 57
Vout (Nom) (V) 48
Iout (Max) (A) 2.5
Output Power (W) 120
Isolated/Non-Isolated Isolated
Input Type DC
Topology POE
Communications equipment
Important note

TI’s FirmPSE System Firmware, GUI, Host Interface Protocol and FirmPSE advisory is available. Request now

TPS23881 product advisory and SRAM firmware update is available. Request now

Design files & products

Design files

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

SLVUBN3A.PDF (3038 K)

Reference design overview and verified performance test data

TIDM290.ZIP (1309 K)

Detailed schematic diagram for design layout and components

TIDM291.ZIP (158 K)

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

TIDM292.ZIP (1032 K)

Detailed overview of design layout for component placement

TIDM294.ZIP (7518 K)

Files used for 3D models or 2D drawings of IC components

TIDCFO4.ZIP (11941 K)

Design file that contains information on physical board layer of design PCB

TIDM293.ZIP (7647 K)

PCB layer plot file used for generating PCB design layout

Products

Includes TI products in the design and potential alternatives.

Power sourcing equipment

TPS238814-pair, type-4, 8-channel Power-over-Ethernet (PoE) PSE with 200mΩ RSENSE & autonomous mode

Data sheet document-pdfAcrobat PDF open-in-new HTML
Boost controllers (external switch)

LM502013-100V Wide Vin, Current Mode PWM Boost, Flyback, Sepic Controller

Data sheet document-pdfAcrobat PDF
Current sense amplifiers analog output

INA240-4 to 80V, bidirectional, ultra-precise current sense amplifier with enhanced PWM rejection

Data sheet document-pdfAcrobat PDF open-in-new HTML
Digital isolators

ISO7731Robust EMC, triple-channel, 2/1, reinforced digital isolator

Data sheet document-pdfAcrobat PDF open-in-new HTML
I2C isolators

ISO15412.5-kVrms, isolated unidirectional clock, bidirectional I2C isolator

Data sheet document-pdfAcrobat PDF open-in-new HTML
Ideal diode/ORing controllers

LM5050-15-V to 75-V, 400-uA IQ ideal diode controller

Data sheet document-pdfAcrobat PDF open-in-new HTML
Linear & low-dropout (LDO) regulators

TPS7A400150-mA, 100-V, low-IQ, adjustable low-dropout voltage regulator with enable

Data sheet document-pdfAcrobat PDF open-in-new HTML
MSP430 microcontrollers

MSP430F523425 MHz MCU with 128KB Flash, 8KB SRAM, comparator, DMA, UART/SPI/I2C, timer, HW multiplier

Data sheet document-pdfAcrobat PDF
Series voltage references

REF34252.5-V, low-drift, low-power, small-footprint series voltage reference

Data sheet document-pdfAcrobat PDF open-in-new HTML
Shunt voltage references

TLV431A1% accuracy, low-voltage, adjustable precision shunt regulator

Data sheet document-pdfAcrobat PDF open-in-new HTML
Supervisor & reset ICs

TPS3890Low-quiescent current 1% accuracy supervisor with programmable delay

Data sheet document-pdfAcrobat PDF open-in-new HTML

Start development

Hardware

Daughter card

TPS23881EVM-083 – IEEE 802.3bt ready PSE daughter card for 24-port PSE system

TPS23881EVM-008 is a 24-port (48-channel) daughter card to evaluate the TPS23881 which is a 4-pair, type-4, 8-channel Power-over-Ethernet (PoE) PSE with 200mΩ sense resistor. This daughter card provides evaluation and reference circuitry for the TPS23881 in high port count applications such as (...)

In stock
Limit: 2
Daughter card

PSEMCUDAUEVM-082 – MCU daughter card for 24-port IEEE 802.3bt ready PSE system

PSEMCUDAUEVM-082 is the MSP430 MCU daughter card for TI's 24-port reference designs with the TPS23881 and TPS23882. This board combined with the GUI enables FirmPSE which is TI's production ready system firmware that can deliver system features such as port power management and the use of multiple (...)

In stock
Limit: 2
Evaluation board

PSEMTHR24EVM-081 – Mother board for 24-port IEEE 802.3bt ready PSE system

PSEMTHR24EVM-081 is the base board for the TPS23881 and TPS23882 PSE controllers. This board contains 24 2-Pair / 4-Pair ports that can that can be used to send up to 30W/port for IEEE 802.3at applications and up to 90W/port for IEEE 802.3bt applications.

In stock
Limit: 1
Evaluation board

FIRMPSEEVM-BDL – TPS23881EVM-083 + PSEMCUDAUEVM-082 + PSEMTHR24EVM-081 bundle

PSEMTHR24EVM-081 is the base board for the TPS23881 and TPS23882 PSE controllers. This board contains 24 2-Pair / 4-Pair ports that can that can be used to send up to 30W/port for IEEE 802.3at applications and up to 90W/port for IEEE 802.3bt applications.

Technical documentation

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Type Title Date
* Design guide 24-Port (4 Pair) Power Sourcing Equipment Reference Design for Multi-port Applic (Rev. A) Oct. 15, 2019
Application note Choosing PoE PSE System Software Solutions Aug. 03, 2021
Technical article Get more out of your power supply with port power management Nov. 11, 2019
Analog design journal Challenges and solutions for PoE systems in Ethernet switches Sep. 30, 2019

Related design resources

Hardware development

EVALUATION BOARD
USB2ANY USB2ANY interface adapter
HARDWARE PROGRAMMING TOOL
MSP-FET MSP MCU Programmer and Debugger

Support & training

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