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Product details

Parameters

Vin (Min) (V) 44 Vin (Max) (V) 57 ILIM Programmable PoE standards supported 802.3at Type 1 (802.3af), 802.3at Type 2, 802.3bt Type 3, 802.3bt Type 4 FET External MPS method DC Disconnect Pair control 2-Pair Alt A, 4-Pair Operating temperature range (C) -40 to 125 Features Auto Mode, Autonomous 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 Number of PSE ports 8 open-in-new Find other Power sourcing equipment

Package | Pins | Size

VQFN (RTQ) 56 64 mm² 8 x 8 open-in-new Find other Power sourcing equipment

Features

  • IEEE 802.3bt PSE solution for Type 3 or Type 4 Power Over Ethernet applications
  • Eight independent PSE channels
  • Resistor selectable Autonomous operation
    • No external MCU required
  • 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)

All trademarks are the property of their respective owners.

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Description

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, determine the power requirements of the devices according to their classification, 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.

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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Download
Information

ReviewTI’s PoE 2 Conformance Test Reportfor interoperability confidence with the TPS23881.

Technical documentation

= Featured
No results found. Please clear your search and try again. View all 11
Type Title Date
* Datasheet TPS23881 Type-4 4-Pair 8-Channel PoE PSE Controller with SRAM and 200 mΩ RSENSE datasheet (Rev. C) Oct. 07, 2019
User guides TPS23881 PoE2 Test Report May 26, 2020
Technical articles The ABCs and 123s of PoE Apr. 17, 2020
Technical articles Get more out of your power supply with port power management Nov. 11, 2019
User guides 24-Port (4 Pair) Power Sourcing Equipment Reference Design for Multi-port Applic (Rev. A) Oct. 15, 2019
Application notes Challenges and solutions for PoE systems in Ethernet switches Sep. 30, 2019
Application notes How to Load TPS2388x SRAM and Parity Code over I2C (Rev. C) Sep. 17, 2019
User guides TPS23881EVM: PoE, PSE, TPS23881 Evaluation Module (Rev. A) Aug. 08, 2019
User guides TPS23881EVM: PoE, PSE, TPS23881 Evaluation Module Apr. 24, 2019
Technical articles Mutual ID and its effect on backwards compatibility Nov. 07, 2014
Technical articles 4PPoE task force discusses next-gen Power over Ethernet Oct. 09, 2014

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARDS Download
document-generic User guide
Description
The PSEMTHR24EVM-081 mother board features 24 port 2pair/4pair PSE system. When paired with the TPS23881EVM-083 48-channel 4-Pair (90W) PSE daughter card or TPS23882EVM-084 24-channel 2-Pair (30W) PSE daughter card and PSEMCUDAUEVM-082 MCU daughter card (sold separately), users can evaluate this (...)
Features
  • 24 port PoE PSE system and expandable to 48 ports
  • Highly flexible system with configurable GUI and host interface
  • Multiport power management
  • IEEE802.3bt compliance
  • Mutiple power supplies
  • Supporting Legacy PD
DAUGHTER CARDS Download
document-generic User guide
$199.00
Description
When paired with the TPS23881EVM-083 48-channel 4-Pair (90W) PSE daughter card or TPS23882EVM-084 24-channel 2-Pair (30W) PSE daughter card and PSEMTHR24EVM-081 mother board (sold separately), users can evaluate a multiple-port PSE system.  The MCU daughter card specifically enables the (...)
Features
  • 24 port PoE PSE system and expandable to 48 ports
  • Highly flexible system with configurable GUI and host interface
  • Multiport power management
  • IEEE 802.3bt compliance
  • Mutiple power supplies
  • Supporting Legacy PD
DAUGHTER CARDS Download
document-generic User guide
Description
The TPS23881EVM daughter card features the octal channel, TPS23881, IEEE 802.3bt ready PoE PSE controller. When paired with the IEEE 802.3bt ready PSE motherboard BOOST-PSEMTHR-007 (sold separately), user's can evaluate the TPS23881 device. The full PoE Evaluation ecosystem includes the following (...)
Features
  • Eight IEEE802.3bt ready channel PoE PSE controller
  • Pin programmable I2C addresses
  • Low cost 2-layer PCB
  • Flexible operation modes: auto, semi-auto and manual
  • Capacitance measurement (legacy detection)
DAUGHTER CARDS Download
document-generic User guide
$299.00
Description
The TPS23881EVM-083 daughter card features an 8 channel, IEEE 802.3bt ready PSE controller. When paired with motherboard PSEMTHR24EVM-081  and MCU daughter card PSEMCUDAUEVM-082 (sold separately), users can evaluate a full multiple-port PSE system.

The full PoE Evaluation ecosystem includes the (...)
Features
  • 24 port PoE PSE system and expandable to 48 ports
  • Highly flexible system with configurable GUI and host interface
  • Multiport power management
  • IEEE 802.3bt compliance
  • Mutiple power supplies
  • Supporting Legacy PD
DEVELOPMENT KITS Download
document-generic User guide
Description

 

  • This motherboard is the base board for the PSE Controller ecosystem.  The octal channel, TPS23880 and TPS23881, IEEE 802.3bt ready PoE PSE controllers can be evaluated by using the motherboard (BOOST-PSEMTHR-007), TPS23881EVM daughter card (TPS23881EVM-008) and/or TPS23880EVM daughter card (...)
Features
  • Four IEEE802.3bt ready, 2 pair ports with 1000BASE-T (gigabit Ethernet data pass through)
  • Two IEEE802.3bt ready, 4 pair ports with 1000BASE-T (gigabit Ethernet data pass through)
  • On board I2C interface to TPS23880 or TPS23881 devices from either USB2ANY or MSP430FR5969 LaunchPad Development Kit
  • Single (...)
GUIS FOR EVALUATION MODULES (EVM) Download
SLVC772B.ZIP (85157 KB)

Software development

CODE EXAMPLES & DEMOS Download
SLVC771A.ZIP (1866 KB)

Reference designs

REFERENCE DESIGNS Download
24-port (PoE 2, 4-pair) power sourcing equipment reference design for multi-port applications
TIDA-050026-23881 — 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 (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
QFN (RTQ) 56 View options

Ordering & quality

Support & training

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Videos

PoE firmware ecosystem: Minimal effort, faster production

PSE systems have never been easier. Take 3 minutes to watch a quick demo of our PoE PSE system firmware ecosystem, including hardware and GUI walk-throughs.

Posted: 19-Jan-2019
Duration: 02:41

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