The LT4275 powered-device (PD) interface controllers are LTPoE++-. PoE+-, and PoE-compliant and target applications requiring up to 90 W. The existing PoE+ standard limits the maximum PD power delivery to 25.5 W, which is insufficient for picocells, base stations, signage, and heated outdoor cameras. The device expands the power budget to 38.7-, 52.7-, 70-, and 90-W power levels to accommodate these applications. They deliver power to PD loads using just one IC.
The LT4275 controls an external MOSFET to reduce PD heat dissipation and maximize power efficiency. It allows users to size the MOSFET to their application’s specific heating and efficiency requirements. It is offered in industrial and automotive grades, supporting operating temperature ranges from –40° to 85°C and –40° to 125°C. (From $1.45 ea/1,000 — available now.)
By Paul O’Shea
Linear Technology , Milpitas , CA
Sales Office 408-428-2050
www.linear.com
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