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QUAD IEEE 802.3at Power-Over-Ethernet PSE Controller


Package | PIN: TSSOP (PW) | 28
Temp: Q (-40 to 125)
Carrier: Cut Tape
Qty Price
1-9 $3.08
10-24 $2.77
25-99 $2.59
100-249 $2.32
250-499 $2.17
500-749 $1.89
750-999 $1.63
1000+ $1.60


  • IEEE 802.3at Quad Port PSE Controller
    • Auto Detect, Classification
    • Auto Turn-On andDisconnect
    • 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 InitialI2C 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

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Texas Instruments  TPS23861PWR

The TPS23861 is an easy-to-use, flexible, IEEE802.3at PSE solution. As shipped, itautomatically 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-eventclassification is supported for type-2 PDs. The TPS23861 supports DC disconnection and the externalFET architecture allows designers to balance size, efficiency and solution costrequirements.

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

In addition to automatic operation, the TPS23861 supports Semi-Auto Mode viaI2C control for precision monitoring and intelligent power management.Compliance with the 400-ms TPON specification is ensured whether insemi-automatic or automatic mode.