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

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TPS23882RTQR General Description

The TPS23882 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 TPS23882 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.

Texas Instruments, Inc Inventory

Key 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 ±3%
  • 200-mΩ Current sense resistor
  • Legacy PD capacitance measurement
  • 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
Texas Instruments, Inc Original Stock
Texas Instruments, Inc Inventory


Category Integrated Circuits (ICs)Power Management (PMIC)Power Over Ethernet (PoE) Controllers Mfr Texas Instruments
Series - Package Tape & Reel (TR)Cut Tape (CT)Digi-Reel®
Product Status Active Type Controller (PSE)
Number of Channels 8 Power - Max 30 W
Internal Switch(s) No Auxiliary Sense No
Standards 802.3at (PoE+), 802.3af (PoE), 802.3bt Voltage - Supply 3V ~ 3.6V
Current - Supply 10mA Operating Temperature -40°C ~ 125°C (TJ)
Mounting Type Surface Mount Package / Case 56-VFQFN Exposed Pad
Supplier Device Package 56-VQFN (8x8) Base Product Number TPS23882
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, 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
Rating Catalog feature-type PSE Controller
feature-standard-supported IEEE802.3af/IEEE802.3at/IEEE802.3bt feature-process-technology
feature-minimum-input-voltage-v 3 feature-maximum-input-voltage-v 3.6
feature-maximum-current-limit-ma 1250 feature-typical-inrush-current-ma
feature-inrush-resistance-kohm feature-maximum-output-power-w 4|7|15.4|30
feature-maximum-oscillating-frequency-hz feature-maximum-duty-cycle- 6.7
feature-programmability Yes feature-packaging
feature-pin-count 56 feature-supplier-package VQFN EP
feature-standard-package-name1 QFN feature-cecc-qualified
feature-esd-protection feature-military No
feature-aec-qualified No feature-auto-motive No
feature-p-pap No feature-eccn-code EAR99
feature-svhc feature-svhc-exceeds-threshold No

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Availability: 7440 PCS

Qty. Unit Price(USD) Ext. Price
1+ $5.147 $5.15
10+ $4.895 $48.95
30+ $4.742 $142.26
100+ $4.613 $461.30

The prices below are for reference only.