The LTC4265 is a PoE PD interface that can identify 2-event classification (see sidebar) protocol and present an active signal as required for operation in an IEEE 802.3at-compliant PD. In addition, the LTC4265 may be config- ured for a variety of auxiliary power options with the aid of the shutdown and signature corrupt features. The LTC4265 is highly integrated and easy to apply, requiring only one classification programming resistor.
This document introduces the LTC4265, a PoE PD interface designed for the third-generation Power over Ethernet standard (IEEE 802.3at), also known as PoE+. The device supports 2-event classification protocols to identify Type-2 PSEs and can deliver up to 25.5W of power.
The IEEE 802.3at standard (PoE+) establishes a maximum available power of 25.5W for Type-2 PDs.
The maximum available power to a Type-2 PD is 25.5W.
The LTC4265 presents a class 4 load current when the input voltage is between 14.5V and 20.5V.