Silicon Labs complete Power over Ethernet portfolio

March 18, 2020 //By Wisse Hettinga
Silicon Labs complete Power over Ethernet portfolio
New IEEE 802.3bt-Compliant PoE Portfolio Simplifies 90 W Power Sourcing Equipment and Powered Device Applications

Silicon Labs has introduced a comprehensive Power over Ethernet (PoE) portfolio that reduces the cost and complexity of adding 90 W PoE to power sourcing equipment (PSE) and powered devices (PD). The new 90 W PoE portfolio complies with the IEEE 802.3bt standard, which more than doubles standard PoE power and expands the capabilities of wireless access points and IoT wireless gateways. The portfolio's higher power capabilities help make PoE-powered 5G small cells and digital buildings a practical reality.

The 802.3bt portfolio includes three new PSE and PD products:

  • The Si3471 PSE controller is the industry's first fully autonomous, 90 W single-port 802.3bt-compliant power-sourcing solution. The Si3471 makes it easy to add 90 W power to single-port midspans or "injectors." It automatically manages all nuances associated with the 802.3bt standard. The Si3471 does not require external host MCUs, firmware downloads or software programming and is simple to configure using three digital I/O pins. The small 38-pin 5 mm x 7 mm QFN package and simple BOM help reduce system cost and complexity. 
  • The Si3474 quad Ethernet port PSE controller powers up to four 90 W 802.3bt PoE ports or up to eight 30 W 802.3at/af PoE ports, providing a versatile solution for industrial and commercial Ethernet switches and security recording equipment. The Si3474 can be operated in autonomous mode with full power on each port or in hosted mode, enabling developers to manage power through an I2C interface with a full-featured register map. The Si3474 is available in a 56-pin 8 mm x 8 mm package with an industry-standard pinout.

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