Skyworks has introduced the most recent addition to its broad 802.3bt PoE family, the Si3472 and Si3473 PSE controllers. The newly launched Si3474 can power up to four 802.3bt four-pair Ethernet ports with 90W per port and supports thermally efficient 200mOhm current sense – the new device powers up to four 802.3bt two-pair Ethernet ports with up to 45W per port. The new Si3473 powers up to eight 802.3bt two-pair Ethernet ports with up to 45W per port and are backwards compatible with previous-generation IEEE802.3at and af standards.
All of the company's multi-port PSE devices support autonomous or hosted operation, automatically detecting valid PDs and cutting off port power when connected PDs are removed. In addition, each PSE device offers a full-featured I2C register interface for advanced power management and control.