Skyworks Solutions Inc. Si3471 PoE Power Sourcing Equipment IC

Skyworks Si3471 Power over Ethernet (PoE) Power Sourcing Equipment (PSE) IC is designed for PoE midspans and injectors that do not require a host or microcontroller. The Si3471 integrates one Ethernet port with the IEEE-required Powered Device (PD) detection and classification functionality and can deliver up to 90W. In addition, it features PD disconnect using DC sense algorithms and a robust multipoint detection algorithm. Intelligent protection circuitry includes input under-voltage detection, output current limit, and short-circuit protection. The Skyworks Si3471 works autonomously and does not require a host or MCU to program it. The Si3471 is programmed for maximum available power by pulling its configuration pins high or low.