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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 FET External MPS method DC Disconnect Pair control 2-Pair Alt A 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 PoE 2 Type-3 2-Pair power over ethernet applications
  • Compatible with TI’s FirmPSE system firmware
  • SRAM Programmable memory
  • Programmable power limiting accuracy ±4%
  • 200-mΩ Current sense resistor
  • User selectable 15-W or 30-W autonomous mode with no MCU required
  • Selectable 2-pair port power allocations
    • 4 W, 7 W, 15.4 W, or 30 W
  • 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
  • Never Fooled 4-point detection
  • Inrush and operational foldback protection
  • 425-mA and 1.25-A selectable current limits
  • Port re-mapping
  • 8-bit or 16-bit I2C communication
  • Flexible processor controlled operating modes
    • Auto, semi auto and manual / diagnostic
  • Per port voltage monitoring and telemetry
  • –40°C to +125°C temperature operation

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Description

The TPS23882B 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 PSE controller can detect powered devices (PDs) that have a valid signature, complete mutual identification, and apply power.

The TPS23882B improves on the TPS2388 with reduced current sense resistors, SRAM programmability, programmable power limiting, capacitance measurement, and compatibility with TI’s FirmPSE system firmware (see Device Comparison Table).

Programmable SRAM enables in-field firmware upgradability over I2C 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 1.25-A port current limit and adjustable power limiting allows for the support of non-standard applications above 60-W sourced. The 200-mΩ current sense resistor and external FET architecture allow designs to balance size, efficiency, thermal and solution cost requirements. 

Port remapping and pin-to-pin compatibility with the TPS2388, TPS23880, and TPS23881 devices eases migration from previous generation PSE designs and enables interchangeable 2-layer PCB designs to accommodate different system PoE power configurations.

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Technical documentation

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Type Title Date
* Data sheet TPS23882B Type-3 2-Pair 8-Channel PSE Controller with Autonomous Mode, SRAM, and 200-mΩ RSENSE datasheet Apr. 05, 2021
User guide TPS23882B1EVM: PoE, PSE, TPS23882B1 Evaluation Module Apr. 29, 2021
Certificate TPS23882B1EVM-008 EU RoHs Declaration of Conformity (DoC) Apr. 23, 2021
Technical article Mutual ID and its effect on backwards compatibility Nov. 07, 2014
Technical article Simplify your PCB layout - When 2 is better than 6 Sep. 19, 2014
Technical article Proper Detection is Important, No Fooling! Sep. 05, 2014
Technical article What You Should Know About Integrated MOSFET's in PoE PSE's Aug. 28, 2014

Design & development

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

Hardware development

EVALUATION BOARD Download
document-generic User guide
199
Description
This motherboard is the base board for the PSE Controller ecosystem. The octal channel, TPS23882, IEEE 802.3bt ready PoE PSE controller can be evaluated by using the motherboard (BOOST-PSEMTHR8-097) and TPS23882EVM daughter card (TPS23882EVM-008) (sold separately). The full PoE Evaluation ecosystem (...)
Features
  • 8 port PoE PSE system
  • Highly flexible system with configurable GUI and host interface
  • Low-cost solution
  • IEEE 802.3bt ready
DAUGHTER CARD Download
document-generic User guide
99
Description

The TPS23882B1EVM-008 daughter card features an eight-channel, IEEE 802.3bt ready (Type-3, 30-W) 2-pair PSE controller.

Features
  • Eight-port PoE PSE system
  • Highly flexible system with configurable GUI and host interface
  • Low-cost solution
  • IEEE 802.3bt ready

Software development

GUI FOR EVALUATION MODULE (EVM) Download
SLVC772C.ZIP (85101 KB)

Design tools & simulation

SIMULATION TOOL Download
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — 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 (...)
Features
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)

CAD/CAE symbols

Package Pins Download
QFN (RTQ) 56 View options

Ordering & quality

Information included:
  • RoHS
  • REACH
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring

Recommended products may have parameters, evaluation modules or reference designs related to this TI product.

Support & training

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