Skyworks introduced the latest addition to our broad 802.3bt Power Over Ethernet (PoE) family, the Si3472, and Si3473 PSE controllers. The recently launched Si3474 powers up to four 802.3bt 4-pair Ethernet ports with 90 W per port and supports thermally efficient 200mΩ current sense. The latest Si3472 powers up to four 802.3bt 2-pair Ethernet ports with up to 45 W per port. The latest Si3473 powers up to eight 802.3bt 2-pair Ethernet ports with up to 45 W per port and are backward compatible with previous-generation IEEE802.3at and af standards.
All Skyworks multi-port PSE devices support autonomous or hosted operation, automatically detecting valid Powered Devices (PDs) and cutting off port power when connected PDs are removed. In addition, each PSE device provides a full featured I2C register interface for advanced power management and control.