TPS23861 PSE Controller

TPS23861 PSE Controller

Texas Instruments' 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.

Features
  • 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
  • Optional I2C control and monitoring
  • Automatic mode – as shipped
    • No external terminal setting required
    • No initial I2C communication required

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