TPS23861PW集成电路（IC）的以太网供电（PoE）控制器规格书PDF中文资料

TPS23861PW属于集成电路（IC）的以太网供电（PoE）控制器。由德州仪器制造生产的TPS23861PW以太网供电（PoE）控制器以太网供电 (PoE) 控制器允许设计人员通过单个以太网连接传输电流和数据。远程设备通过以太网电缆供电，因此无需电池、本地电源适配器和其他电源电缆。桥式整流器和 N+1 O-Ring 是两种 PoE 控制器类型。可用特性可能包括 N 和 P 沟道 FET、内部开关和汽车认证。

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

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• 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

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.