Silicon Labs SI3452B-B02-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 PC interface requires no external MCU, enabling easy and cost-effective management of 4 to 48 ports by the host system.

Features
Programmable architecture supports IEEE 802.3af (PoE) and IEEE 802.3at (PoE ) PSES
Programmable current limits for PoE (350 mA) and PoE (600 mA), with custom limits up to 850 mA
Per-port current and voltage monitoring for advanced power management and control
Power policing mode
Robust multi-point detection
Supports 1-Event and 2-Event classification algorithms
Comprehensive 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

Applications
Power over Ethernet endpoint switches and midspans for IEEE Std 802.3af and 802.3at
High-power PDs, such as:
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