TPS23881

Name: TPS23881
Brand: TI
SKU: TPS23881
Price: 4.301 USD

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4-pair, type-4, 8-channel PoE PSE with 200-mΩ RSENSE

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Data sheet

document-pdfAcrobat TPS23881 Type-4 4-Pair 8-Channel PoE 2 PSE Controller with SRAM and 200 mΩ RSENSE datasheet (Rev. E) PDF | HTML

Product details

PoE standards supported

802.3at Type 1 (802.3af), 802.3at Type 2, 802.3bt Type 3, 802.3bt Type 4

MPS method

DC Disconnect

Pair control

2-Pair Alt A, 4-Pair

Number of PSE ports

8

Vin (min) (V)

44

Vin (max) (V)

57

FET

External

Features

Auto Mode, Current Limit with Foldback, Fast shutdown, Multi Level Port Priority, Over Current Reporting, Over Temp Reporting, Port remapping, Programmable PCUT, Programmable Port Power Limiting, SRAM Programmable

ILIM

Programmable

Operating temperature range (°C)

-40 to 125

Rating

Catalog

PoE standards supported

802.3at Type 1 (802.3af), 802.3at Type 2, 802.3bt Type 3, 802.3bt Type 4

MPS method

DC Disconnect

Pair control

2-Pair Alt A, 4-Pair

Number of PSE ports

8

Vin (min) (V)

44

Vin (max) (V)

57

FET

External

Features

Auto Mode, Current Limit with Foldback, Fast shutdown, Multi Level Port Priority, Over Current Reporting, Over Temp Reporting, Port remapping, Programmable PCUT, Programmable Port Power Limiting, SRAM Programmable

ILIM

Programmable

Operating temperature range (°C)

-40 to 125

Rating

Catalog

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)

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.

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.

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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.

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Technical documentation

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Design & development

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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.

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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 (...)

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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

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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 (...)

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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

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Code example or demo

SLVC771 — TPS23881 PoE MSP430 Reference Code for Basic Application

Supported products & hardware

Products

Power sourcing equipment

TPS23881 — 4-pair, type-4, 8-channel PoE PSE with 200-mΩ RSENSE

Hardware development

Development kit

BOOST-PSEMTHR-007 — TPS2388x motherboard for IEEE 802.3bt-ready PoE PSE applications

Download

GUI for evaluation module (EVM)

SLVC772 — TPS2388x EVM GUI

Supported products & hardware

Products

Power sourcing equipment

TPS23880 — 4-pair, type-4, 8-channel PoE PSE with programmable SRAM

TPS23881 — 4-pair, type-4, 8-channel PoE PSE with 200-mΩ RSENSE

TPS23882 — Type-3, 2-pair, 8-channel PoE PSE controller with SRAM and 200-mΩ RSENSE

TPS23882B — Type-3, two-pair, 8-channel PoE PSE controller with autonomous mode, SRAM and 200-mΩ RSENSE

Hardware development

Evaluation board

BOOST-PSEMTHR8-097 — TPS23882 Type-3, 30W, 2-pair, PSE motherboard for 8-port PSE systems

Daughter card

TPS23880EVM-008 — TPS23880 EVM daughter card for IEEE 802.3bt-ready PoE PSE applications

TPS23881EVM-008 — TPS23881 daughter card for IEEE 802.3bt ready PoE PSE applications

TPS23882B1EVM-008 — TPS23882B daughter card type-3, 30-W, two-pair, eight-port system PSE

TPS23882EVM-008 — TPS23882 Type-3, 30W, 2-pair, PSE daughter card for 8-port PSE systems

Development kit

BOOST-PSEMTHR-007 — TPS2388x motherboard for IEEE 802.3bt-ready PoE PSE applications

Download

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 (...)

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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 (...)

Design guide: PDF

Schematic: PDF

TI's Standard Terms and Conditions for Evaluation Items apply.

	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

TPS23881

4-pair, type-4, 8-channel PoE PSE with 200-mΩ RSENSE

TPS23881

Product details

Request more information

Similar products you might be interested in

Pin-for-pin with same functionality to the compared device

Technical documentation

Design & development

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

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

TPS23881EVM-008 — TPS23881 daughter card for IEEE 802.3bt ready PoE PSE applications

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

BOOST-PSEMTHR-007 — TPS2388x motherboard for IEEE 802.3bt-ready PoE PSE applications

Ordering & quality

Support & training

TI E2E™ forums with technical support from TI engineers

Video series

Videos

Download options

SLVC771 — TPS23881 PoE MSP430 Reference Code for Basic Application

Release Information

Download options

SLVC772 — TPS2388x EVM GUI

Release Information