Linear Introduces Four-Port PoE Controller Linear Technology has unveiled the LTC4266 four-port power-over-Ethernet (PoE) controller for power sourcing equipment (PSE) needed to provide IEEE 802.3at (25.5W) or proprietary higher power levels. Next-generation PoE applications call for more power to support demanding features, while increasing power efficiency in an effort to be more environmentally friendly and to reduce costs, according to the company. The LTC4266 provides up to 100W over four-pair Ethernet cabling and is fully compliant with the new IEEE 802.3at PoE+ standard and backward compatible with the prior IEEE 802.3af PoE standard. To help conserve power, the LTC4266 delivers low heat dissipation by using low RDS(ON) MOSFETs and 0.25ohm sense resistors, eliminating the need for expensive heatsinks and providing a stronger PSE solution. The LTC4266 is suitable for a variety of PSE applications, including next-generation switches, routers, hubs and midspans. The low power...
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