Silicon Labs has released a complete PoE portfolio designed to simplify the addition of 90-W power sourcing equipment and powered devices, enabling PoE-powered 5G small cells and digital buildings
By Gina Roos, editor-in-chief
Silicon Labs has introduced a
complete 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 90-W PoE portfolio
meets the IEEE 802.3bt standard, expanding the capabilities of wireless access
points and IoT wireless gateways and enabling PoE-powered 5G small cells and
digital buildings, said the company.
The PoE portfolio spans from 15
W to 90 W and offers several options for PSE and PD applications. The portfolio
includes three new 802.3bt-compliant devices – the Si3471 PSE controller, Si3474
quad Ethernet port PSE controller, and Si34071 single-chip PD solution.
Claimed as the
industry’s first fully autonomous, 90-W single-port 802.3bt-compliant
power-sourcing solution, the Si3471 PSE controller makes it easy to add 90-W
power to single-port midspans or “injectors.” The device does not require
external host MCUs, firmware downloads or software programming, said Silicon
Labs, and is simple to configure using three digital I/O pins. The Si3471 is
packaged in a small 38-pin, 5 x 7 mm QFN.
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, which offers designers higher flexibility for industrial
and commercial Ethernet switches and security recording equipment. The device 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 x 8-mm
package with an industry-standard pinout.
The Si34071 single-chip PD
solution combines an 802.3bt interface with an integrated, high-efficiency
DC-DC converter that is capable of achieving more than 90 percent end-to-end
efficiency. The device provides high power for 5G small cells, wireless access
points, and IoT gateways. A companion to the Si3471 PSE controller, the Si34071
is available in a small 32-pin, 5 x 5-mm QFN package.
Si3471 samples and production
quantities are available now. Pricing starts at $1.97 in quantities of 10,000. The
Si3471 evaluation board (EVB) is priced at $105.
Si3474 samples and EVBs will be
available in April 2020. Pricing starts at $3.33 in quantities of 10,000. The
Si3474 EVB is priced at $199.
Si34071 samples and EVBs will
be available in April 2020. Pricing starts at $2.13 in quantities of 10,000. The
Si34071 71-W forward converter EVB is priced at $119.