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.

Si347x Features

• IEEE 802.3bt compliant up to 90 W
• High speed integrated flash
• Supports 4 or 8 Ethernet PoE ports/PSE
• Supports 200 mΩ or 255 mΩ current sense resistors
• Compact 5 x 7 or 8 x 8 mm QFN
• Matching portfolio of PoE powered devices (PD)
• Comprehensive development kit with software GUI
• SI3472-KIT and Si3473-KIT

Si347x Benefits

• Leverages the latest industry standard for longevity while still being backwards compatible with IEEE 802.3at and af standards.
• Eliminates the cost and board space requirement of external flash or OTP of competitive solution while enabling much faster boot up.
• Optimized thermal performance
• Easy to use development kits with comprehensive documentation speed your design