Typical Application Circuit for LT4275BIMS LTPoE++ 90W Powered Device Interface. The LT4275 is a pin-for-pin compatible family of IEEE 802.3 and LTPoE++ powered device (PD) controllers. The LT4275A employs a proprietary LTPoE++ classification scheme, delivering 38.7W, 52.7W, 70W or 90W of power