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TPS23861

ACTIVE

2-pair, type-2, 4-channel PoE PSE with autonomous mode

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Data sheet

TPS23861

ACTIVE
Data sheet Order now

Product details

Vin (min) (V) 44 Vin (max) (V) 57 ILIM Programmable PoE standards supported 802.3at Type 1 (802.3af), 802.3at Type 2 FET External MPS method DC Disconnect Pair control 2-Pair Alt A Operating temperature range (°C) -40 to 125 Features Autonomous Mode, Current Limit with Foldback, Fast shutdown, Over Current Reporting, Over Temp Reporting, Programmable ICUT Number of PSE ports 4 Rating Catalog
Vin (min) (V) 44 Vin (max) (V) 57 ILIM Programmable PoE standards supported 802.3at Type 1 (802.3af), 802.3at Type 2 FET External MPS method DC Disconnect Pair control 2-Pair Alt A Operating temperature range (°C) -40 to 125 Features Autonomous Mode, Current Limit with Foldback, Fast shutdown, Over Current Reporting, Over Temp Reporting, Programmable ICUT Number of PSE ports 4 Rating Catalog
TSSOP (PW) 28 62.08 mm² 9.7 x 6.4
  • IEEE 802.3at Quad Port PSE controller
    • Auto Detect, classification
    • Auto Turn-On and disconnect
    • Efficient 255-mΩ sense resistor
  • Pin-Out enables Two-Layer PCB
  • Kelvin Current Sensing
  • 4-Point detection
  • Automatic mode – as shipped
    • No External terminal setting required
    • No Initial I2C communication required
  • Semi-Automatic mode – set by I2C command
  • Optional I2C control and monitoring
  • –40°C to 125°C Temperature range
  • TSSOP 28 Package 9.8 mm x 6.6 mm
  • IEEE 802.3at Quad Port PSE controller
    • Auto Detect, classification
    • Auto Turn-On and disconnect
    • Efficient 255-mΩ sense resistor
  • Pin-Out enables Two-Layer PCB
  • Kelvin Current Sensing
  • 4-Point detection
  • Automatic mode – as shipped
    • No External terminal setting required
    • No Initial I2C communication required
  • Semi-Automatic mode – set by I2C command
  • Optional I2C control and monitoring
  • –40°C to 125°C Temperature range
  • TSSOP 28 Package 9.8 mm x 6.6 mm

The TPS23861 is an easy-to-use, flexible, IEEE802.3at PSE solution. As shipped, it automatically manages four 802.3at ports without the need for any external control.

The TPS23861 automatically detects Powered Devices (PDs) that have a valid signature, determines power requirements according to classification and applies power. Two-event classification is supported for type-2 PDs. The TPS23861 supports DC disconnection and the external FET architecture allows designers to balance size, efficiency and solution cost requirements.

The unique pin-out enables 2-layer PCB designs via logical grouping and clear upper and lower differentiation of I2C and power pins. This delivers best-in-class thermal performance, Kelvin accuracy and low-build cost.

In addition to automatic operation, the TPS23861 supports Semi-Auto Mode via I2C control for precision monitoring and intelligent power management. Compliance with the 400-ms TPON specification is ensured whether in semi-automatic or automatic mode.

The TPS23861 is an easy-to-use, flexible, IEEE802.3at PSE solution. As shipped, it automatically manages four 802.3at ports without the need for any external control.

The TPS23861 automatically detects Powered Devices (PDs) that have a valid signature, determines power requirements according to classification and applies power. Two-event classification is supported for type-2 PDs. The TPS23861 supports DC disconnection and the external FET architecture allows designers to balance size, efficiency and solution cost requirements.

The unique pin-out enables 2-layer PCB designs via logical grouping and clear upper and lower differentiation of I2C and power pins. This delivers best-in-class thermal performance, Kelvin accuracy and low-build cost.

In addition to automatic operation, the TPS23861 supports Semi-Auto Mode via I2C control for precision monitoring and intelligent power management. Compliance with the 400-ms TPON specification is ensured whether in semi-automatic or automatic mode.
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TPS23882B ACTIVE Type-3, two-pair, 8-channel PoE PSE controller with autonomous mode, SRAM and 200-mΩ RSENSE Optimized for designs with more than four-ports

Technical documentation

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Type Title Date
* Data sheet TPS23861 IEEE 802.3at Quad Port Power-over-Ethernet PSE Controller datasheet (Rev. I) PDF | HTML 23 Jul 2019
Application brief Using the TPS23861 and TPS23882B in Autonomous Mode Features and Benefits PDF | HTML 30 Jul 2021
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
EVM User's guide TPS23861EVM-612: Auto-Mode Evaluation Module for TPS23861 (Rev. E) 24 Apr 2018
Application note Lightning Surge Considerations for PoE Power Sourcing Equipment Devices 20 Feb 2017
Technical article Make your PSE system smarter and more efficient PDF | HTML 16 Feb 2017
Application note TPS23861 VDD Power Solutions 24 Aug 2016
Application note TPS23861 Power-On Considerations 21 Jul 2015
Application note SIFOs 802.3at Conformance Report, v 4.0.77, TPS23861 11 Jun 2014
Application note University of New Hampshire Interoperability Lab Interoperability Test, TPS23861 11 Jun 2014
Application note University of New Hampshire Interoperability Lab Conformance Test, TPS23861 25 Apr 2014

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