Silabs Si3452四路高压PoE+PSE端口控制方案

Silabs 公司的Si3452是四路高压PoE和PoE+PSE端口控制器，每个器件支持四路PSE接口，PoE的可编电流限制为15.4W（350mA），PoE+的可编电流限制为30W(600mA)，专有系统可高达40W(850mA)，I2C接口不需要MCU，非常适合主系统的4-48端口低成本管理，支持IEEE 802.3af (PoE)和IEEE 802.3at (PoE+) PSE，主要用在以太网供电IEEE Std 802.3af 和802.3at端点的交换和中跨，支持大功率PD设备如Pan/Tilt/Zoom安全摄像设备，802.11n WAP，多频带多无线电WAP，安全和RFID系统，工业自动化系统，IP电话系统和iPBX, WiMAX ASN/BTS和CPE/ODU系统。本文介绍了Si3452主要特性，功能方框图，应用框图以及Si3452MS8 8端口评估板电路图，RJ45连接器板电路图和相应的材料清单。

QUAD HIGH-VOLTAGE PORT CONTROLLER FOR POE AND POE+ PSES

When connected directly to the host system or configured in Auto mode, each Si3452 high-voltage port controller provides all of the critical circuitry and sophisticated power measurement functionality for the high-voltage interfaces of four complete PSE ports. The Si3452 fully integrates robust, low-RON (0.3 ohm typical) power MOSFET switches, low-power dissipation current sensing circuitry, and transient voltage surge suppression devices.
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