Silicon Labs SI3482-A01-GMR

Description
The Si3482 is a power management controller designed for use with the S13452/3 Power over Ethernet (PoE) controllers. It simplifies system implementation of power management for up to 48 ports with three power sources.
The Si3482 is programmed via a SPI or UART interface to configure power supply capacity, port power configuration, port priority, detection timing, and fault recovery protocol. Once programmed, the configuration data can be saved, and the Si3482 can operate without host intervention.
The Si3482 utilizes the real-time overload and current monitoring capability of the S13452 to manage power among up to 48 ports. Power management can be grant-based or consumption-based to supply power to the maximum number of ports.

Features
Enables use of smaller power supplies for up to 48-port PoE systems with S13452 PSE interface ICs
Supports classification-based and LLDP power negotiation
Supports individual port priority and port configuration
Can operate with or without a host
Supports power supply status from S13452
Configuration save
Pin-selectable SPI or UART interface
Pin-selectable UART data rate
Fully-compliant with IEEE 802.3 clause 33 for PoE including the 802.3at amendment for higher power (30 W, category 2 ports)
Extended operation range (-40 to 85 °C)

Applications
Power over Ethernet Endpoint
Industrial automation systems
Networked audio
IP Phone Systems and iPBXs
Metropolitan area networked WAPs, cameras, and sensors
WIMAX, ASN/BTS, and CPE/ODU systems