Code example or demo
Data sheet
TPS23881
- IEEE 802.3bt PSE solution for PoE 2 Type 3 or Type 4 Power over Ethernet applications
- Eight independent PSE channels
- Compatible with TI’s FirmPSE system firmware
- SRAM Programmable memory
- Programmable power limiting accuracy ±2.5%
- 200-mΩ current sense resistor
- Legacy PD capacitance measurement
- Selectable 2-pair or 4-pair port power allocations
- 15.4 W, 30 W, 45 W, 60 W, 75 W or 90 W
- Single and dual signature PD compatibility
- Dedicated 14-bit integrating current ADC per port
- Noise immune MPS for DC disconnect
- 2% current sensing accuracy
- 1- or 3-bit fast port shutdown input
- Auto-class discovery and power measurement
- Inrush and operational foldback protection
- Flexible processor controlled operating modes
- Auto, semi auto and manual / diagnostic
- Per port voltage monitoring and telemetry
- –40°C to +125°C temperature operation
- Ultra Low Alpha (ULA) packaging (TPS23881A)
The TPS23881 is an 8-channel power sourcing equipment (PSE) controller engineered to insert power onto Ethernet cables in accordance with the IEEE 802.3bt standard. The eight individual power channels can be configured in any combination of 2-Pair (1-channel) or 4-Pair (2-channels) PoE Ports. The PSE controller can detect powered devices (PDs) that have a valid signature, complete mutual identification, and apply power.
The TPS23881 improves on the TPS23880 with reduced current sense resistors, more accurate programmable power limiting, capacitance measurement and the ability to operate from ROM (see Device Comparison Table). The TPS23881 is also compatible with TI’s FirmPSE system firmware, which provides a fully configurable solution for controlling multiple TPS23881 devices in systems offering up to 48-ports of 4-pair PoE power.
Programmable SRAM enables in-field firmware upgradability over I 2C to ensure IEEE compliance and interoperability with the latest PoE enabled devices. Dedicated per port ADCs provide continuous port current monitoring and the ability to perform parallel classification measurements for faster port turn on times. A ±2.5% accurate programmable port power limit provides the ability to expand the maximum power sourced from 90 W to upwards of 125 W. The 200-mΩ current sense resistor and external FET architecture allow designs to balance size, efficiency, thermal and solution cost requirements.
Request more information
- TPS23881 product advisory and latest firmware download are available. Request now
- TI’s FirmPSE System Firmware, GUI, Host Interface Protocol and FirmPSE advisory is available. Request now
- Review TI's PoE 2 Conformance Test Report for interoperability confidence with the TPS23881.
Technical documentation
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View all 10 | Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | TPS23881 Type-4 4-Pair 8-Channel PoE 2 PSE Controller with SRAM and 200 mΩ RSENSE datasheet (Rev. E) | PDF | HTML | 16 May 2023 |
| Application brief | How to Load TPS2388x SRAM and Parity Code Over I2C (Rev. E) | PDF | HTML | 20 Apr 2023 | |
| Application brief | Choosing PoE PSE System Software Solutions | PDF | HTML | 03 Aug 2021 | |
| Test report | TPS23881 PoE2 Test Report | 26 May 2020 | ||
| Technical article | The ABCs and 123s of PoE | PDF | HTML | 17 Apr 2020 | |
| Technical article | Get more out of your power supply with port power management | PDF | HTML | 11 Nov 2019 | |
| Design guide | 24-Port (4 Pair) Power Sourcing Equipment Reference Design for Multi-port Applic (Rev. A) | 15 Oct 2019 | ||
| Analog Design Journal | Challenges and solutions for PoE systems in Ethernet switches | 30 Sep 2019 | ||
| EVM User's guide | TPS23881EVM: PoE, PSE, TPS23881 Evaluation Module (Rev. A) | 08 Aug 2019 | ||
| EVM User's guide | TPS23881EVM: PoE, PSE, TPS23881 Evaluation Module | 24 Apr 2019 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.
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.
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 (...)
Daughter card
TPS23881EVM-008 — TPS23881 daughter card for IEEE 802.3bt ready PoE PSE applications
TPS23881EVM-008 is the 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 which is suitable for high power PSE applications such as (...)
User guide: PDF
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 (...)
Development kit
BOOST-PSEMTHR-007 — TPS2388x motherboard for IEEE 802.3bt-ready PoE PSE applications
BOOST-PSEMTHR-007 is the base board for the TPS23880 and TPS23881 PSE controllers. This board contains four 2-pair ports that can be used to send up to 30W/port for IEEE 802.3at applications and two 4-pair ports that can be used to send up to 90W/port for IEEE 802.3bt applications.
User guide: PDF
GUI for evaluation module (EVM)
SLVC772 — TPS2388x EVM GUI
Supported products & hardware
Products
Power sourcing equipment
Hardware development
Evaluation board
Daughter card
Development kit
Simulation tool
PSPICE-FOR-TI — PSpice® for TI design and simulation tool
PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Reference designs
TIDA-050026-23881 — 24-port (PoE 2, 4-pair) power sourcing equipment reference design for multi-port applications
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 (...)
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| VQFN (RTQ) | 56 | Ultra Librarian |
Ordering & quality
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