Silabs Si3480以太网供电(PoE)管理解决方案

Silabs公司的Si3480是电源管理器,和Si3452以太网供电(PoE)控制器一起使用. Si3480采用引脚编程,可用来选择电源容量,低功率(category 1, 15.4 W)数量以及大功率(category 2, 30 W)端口,端口极性以及检测时序,并提供LED驱动以显示端口状态.不需要软件,也不需要数据隔离,完全和IEEE 802.3 clause 33兼容,主要用在802.11n WAPs, IP电话系统和iPBX,工业动化系统和安全与RFID系统等.本文介绍了Si3480主要特性,功能方框图以及典型应用电路图和8端口电源管理参考设计和评估板.

The Si3480 is a power manager intended for use with the Si3452 Power over Ethernet (PoE) controller. The Si3480 enables the use of a smaller, lower cost, and more efficiently-utilized power supply in an unmanaged PoE Power Sourcing Equipment (PSE) system.

The Si3452 is capable of delivering over 30 W per port, which means that, in a typical 8-port system, a 240 W power supply would have to be used to avoid overload. Typically, not all ports are used at full power; so, a smaller power supply in the range of 30 to 150 W can be used along with the Si3480 power management controller.
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