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 nowTIDA-050026-23881
24-port (PoE 2, 4-pair) power sourcing equipment reference design for multi-port applications
TIDA-050026-23881
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 and MSPM0G1107x families, 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
- PSEM0MCUDAUEVM-018: MSPM0 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
- XDS110 Debugger: Used for flashing FirmPSE app code and BSL code to MSPM0
- USB2ANY: Interface adapter to communicate between FirmPSE GUI and MSP430
List of Software to Download
- FirmPSE APP code: PSE system firmware application code
- FirmPSE BSL code: PSE system firmware boot strap loader code
- FirmPSE GUI: TI’s TPS2388xand MSP430 FirmPSE System Software Ecosystem GUI
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
- 24-Port (4 Pair) Power Sourcing Equipment Reference Design for Multi-port Applications
- FirmPSE host interface
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/MSPM0.
-
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
Design files & products
Design files
Download ready-to-use system files to speed your design process.
SLVUBN3B.PDF (1226 KB)
Reference design overview and verified performance test data
TIDM292A.ZIP (1117 KB)
Detailed overview of design layout for component placement
TIDM291A.ZIP (207 KB)
Complete listing of design components, reference designators, and manufacturers/part numbers
TIDM294A.ZIP (8610 KB)
Files used for 3D models or 2D drawings of IC components
TIDCFO4A.ZIP (14195 KB)
Design file that contains information on physical board layer of design PCB
TIDM293A.ZIP (8310 KB)
PCB layer plot file used for generating PCB design layout
TIDM290A.ZIP (1472 KB)
Detailed schematic diagram for design layout and components
Products
Includes TI products in the design and potential alternatives.
General-purpose MCUs
MSPM0G1107 — 80MHz Arm® Cortex®-M0+ MCU with 128KB flash 32KB SRAM 2x12-bit 4Msps ADC, op-amp
Low-power MCUs
MSP430F5234 — 25 MHz MCU with 128KB Flash, 8KB SRAM, comparator, DMA, UART/SPI/I2C, timer, HW multiplier
Data sheet:
PDF
Start development
Hardware development
Evaluation board
PSEM0DAUEVM-018
— MSPM0 MCU daughtercard for 24-port IEEE 802.3bt-ready PSE system
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 and MSPM0G1107x (...)
Supported products & hardware
Hardware development
Reference design
PSEM0DAUEVM-018
—
MSPM0 MCU daughtercard for 24-port IEEE 802.3bt-ready PSE system
Hardware development
Reference design
Daughter card
PSEMCUDAUEVM-082 — MCU daughter card for 24-port IEEE 802.3bt ready PSE system
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 and MSPM0G1107x (...)
Supported products & hardware
Hardware development
Reference design
In stock
Limit:
Out of stock on TI.com
Not available on TI.com
PSEMCUDAUEVM-082 — MCU daughter card for 24-port IEEE 802.3bt ready PSE system
Hardware development
Reference design
Evaluation board
PSEMTHR24EVM-081 — Mother board for 24-port IEEE 802.3bt ready PSE system
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 and MSPM0G1107x (...)
Supported products & hardware
Hardware development
Reference design
In stock
Limit:
Out of stock on TI.com
Not available on TI.com
PSEMTHR24EVM-081 — Mother board for 24-port IEEE 802.3bt ready PSE system
Hardware development
Reference design
Daughter card
TPS23881EVM-083 — IEEE 802.3bt ready PSE daughter card for 24-port PSE system
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 and MSPM0G1107x (...)
Supported products & hardware
Hardware development
Reference design
In stock
Limit:
Out of stock on TI.com
Not available on TI.com
TPS23881EVM-083 — IEEE 802.3bt ready PSE daughter card for 24-port PSE system
Hardware development
Reference design
Technical documentation
=
Top documentation selected by TI
No results found. Please clear your search and try again.
View all 5
| Top documentation | Type | Title | Format options | Date |
|---|---|---|---|---|
| * | Design guide | 24-Port (4 Pair) Power Sourcing Equipment Reference Design for Multiport Applications (Rev. B) | PDF | HTML | Dec 19, 2025 |
| Application brief | How to Load TPS2388x SRAM and Parity Code Over I2C (Rev. E) | PDF | HTML | Apr 20, 2023 | |
| Application brief | Choosing PoE PSE System Software Solutions | PDF | HTML | Aug 3, 2021 | |
| Technical article | Get more out of your power supply with port power management | PDF | HTML | Nov 11, 2019 | |
| Analog design Journal | Challenges and solutions for PoE systems in Ethernet switches | Sep 30, 2019 |
Support & training
TI E2E™ forums with technical support from TI engineers
Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.
If you have questions about quality, packaging or ordering TI products, see TI support.