Si3452

forN NCo11tNeRwecD 4o0 INeTsmigmnesnded Si3452 QUAD HIGH-VOLTAGE PORT CONTROLLER FOR POE AND POE+ PSES Features  Each Si3452 high-voltage port  Programmable architecture supports controller supports four PSE power IEEE 802.3af (PoE) and IEEE interfaces 802.3at (PoE+) PSEs  Programmable current limits for PoE Programmable current limits for (15.4 W), PoE+ (30 W), and PoE (350 mA) and PoE+ proprietary systems (up to 40 W) per (600 mA), and custom limits to port 850 mA  I2C interface requires no external Per-port current and voltage MCU for easy, low-cost management monitoring for sophisticated power of 4 to 48 ports by the host system management and control  Unique mixed-signal IC high-voltage Power policing mode component integration simplifies Robust multi-point detection design, lowers power dissipation, Supports 1-Event and 2-Event minimizes external BOM, and classification algorithms reduces PCB footprint  Comprehensive, robust, fault- Internal low-RON power FETs with current-sense circuitry Integrated transient voltage surge suppressors protection circuitry Supply undervoltage lockout (UVLO) Output current limit and short- Proprietary dV/dt disconnect sensing methods  Industrial (–40 to 85 °C) operating temperature  Compact, 6×6 mm2, 40-pin QFN RoHS-compliant package circuit protection Foldback current limiting Dual-threshold thermal overload protection Fault source reporting for intelligent port management...