TPS23861

Product Folder Order Now Technical Documents Tools & Software Support & Community TPS23861 SLUSBX9I – MARCH 2014 – REVISED JULY 2019 TPS23861 IEEE 802.3at Quad Port Power-over-Ethernet PSE Controller 1 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 Optional I2C control and monitoring –40°C to 125°C Temperature range TSSOP 28 Package 9.8 mm x 6.6 mm 2 Applications Ethernet switches and routers Surveillance NVR and DVRs Residential gateways PoE Pass-Through systems Wireless backhaul Simplified Schematic 3.3 V 48 V 3 Description 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...