DC2583A

Demonstration circuit 2583 is an Ethernet Alliance™ certified IEEE 802.3bt compliant Power over Ethernet (PoE) powered device (PD). It features the LT®4294 PD interface controller and the LT4321 PoE ideal diode bridge controller. The LT4294 provides IEEE 802.3af (PoE, Type 1), IEEE 802.3at (PoE+, Type 2) and IEEE 802.3bt (PoE++, Type 3 and 4) compliant interfacing. The LT4321 controls eight low RDS(ON) (57mohm typical) N-channel FETs to further improve end-to-end power delivery efficiency and ease thermal design. This solution replaces the eight diodes typically found in a passive PoE rectifier bridge. The DC2583A accepts up to 71.3W of delivered power from a PSE via the RJ45 connector or a local 48V DC power supply using the auxiliary supply input.

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