TPS23861PWR 25.5 W Ethernet Switch IC POE / LAN Quad IEEE 802.3at PSE Controller
ethernet transceiver ic
,fast ethernet switch chip
TPS23861PWR Ethernet Switch IC POE / LAN Quad IEEE 802.3at PSE Controller
1 Features
- IEEE 802.3at Quad Port PSE Controller
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– Auto Detect, Classification
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– Auto Turn-On and Disconnect
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– Efficient 255-mΩ Sense Resistor
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Pin-Out Enables Two-Layer PCB
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Kelvin Current Sensing
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4-Point Detection
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Automatic Mode – As Shipped
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– No External Terminal Setting Required
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– No Initial I2C Communication Required
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Semi-Automatic Mode – Set by I2C Command
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– Continuous Identification and Classification
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– Meets IEEE 400-ms TPON Specification
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– Fast-Port Shutdown Input
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– Operates best when used in conjunction with system reference code http://www.ti.com/product/TPS23861/toolssoftw are
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2 Applications
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Ethernet Switches and Routers
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Surveillance NVR and DVRs
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Residential Gateways
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PoE Pass-Through Systems
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Wireless Backhaul
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 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.
Device Information
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PART NUMBER |
PACKAGE |
BODY SIZE |
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TPS23861 |
TSSOP (28) |
9.80 mm x 6.60 mm |
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