TPS23861 - Texas Instruments

TPS23861 IEEE 802.3at Quad Port Power-over-Ethernet PSE Controller

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 su.

Features

•1 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
  – Continuous Identification and Classification
  – Meets IEEE 400-ms TPON specification
  – Fast-Port shutdown input
  – Operates best when used in conjunction with system reference code http://www.ti.com/product/TPS23861/toolssoftw are
• Op.