Silicon Labs SI3452D-B01-GM

Description
The Si3452 is a high-voltage port controller designed for Power over Ethernet (PoE) and PoE Power Sourcing Equipment (PSEs). It supports four PSE power interfaces and offers programmable current limits for PoE (15.4 W), PoE (30 W), and proprietary systems (up to 40 W) per port. The I2C interface allows for easy management of 4 to 48 ports by the host system without the need for an external MCU.

Features
Supports IEEE 802.3af (PoE) and IEEE 802.3at (PoE ) PSEs
Programmable current limits for PoE (350 mA), PoE (600 mA), and custom limits up to 850 mA
Per-port current and voltage monitoring for power management and control
Power policing mode
Robust multi-point detection
Supports 1-Event and 2-Event classification algorithms
Comprehensive fault-protection circuitry including:
Supply undervoltage lockout (UVLO)
Output current limit and short-circuit protection
Foldback current limiting
Dual-threshold thermal overload protection
Fault source reporting for intelligent port management

Applications
Power over Ethernet Endpoint
Industrial automation system switches and Midspans for IEEE Std 802.3af and 802.3at
Networked audio
Pan/Tilt/Zoom security cameras
802.11n WAPs
Multi-band, multi-radio WAPs
Security and RFID systems
IP Phone Systems and IPBXs
Metropolitan area networked WAPs, cameras, and sensors
WIMAX ASN/BTS and CPE/ODU systems