LT4295IUFD#TRPBF

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The LT4295IUFD#TRPBF is a Power-over-Ethernet (PoE) controller from Linear Technologies, suitable for applications where power is needed over Ethernet cables. This includes edge switches, servers, access points, and VoIP phones. The device manages a 48V input supply and provides both class 0 and class 3 compliant PoE routines.

The LT4295IUFD#TRPBF is designed to comply with the latest IEEE 802.3af and 802.3at technical specifications and is capable of delivering up to 25.5 watts of power using a standard RJ-45 connector. It also has an adjustable output current limit that reduces power consumption and helps to maximize energy efficiency. The device offers integrated surge protection, making it suitable for PoE applications in hostile environments with lightning transients.

The LT4295IUFD#TRPBF is comprised of four major functional blocks: a PSE/PD controller, a voltage regulator, a programmable current limit circuit, and a PoE signal processor. The first block, the PSE/PD controller, is responsible for detecting voltage on the Ethernet cable and driving the switch to enable power delivery. It also provides signal conditioning, signal isolation, and fault reporting. The second block, the voltage regulator, converts the 48V supply for the switch and current limiter circuit; and the third block, the programmable current limit circuit, limits the current supplied to the load and monitors the output voltage.

The fourth block, the PoE signal processor, is the main processor that reports the power and fault conditions. It also processes the incoming PoE signals to detect class 0 and class 3 loading. The PoE signal processor also contains an LED interface to show the switch’s power and fault status. The device’s integrated surge protection also helps to reduce the risk of PoE system damage from lightning transients.

In summary, the LT4295IUFD#TRPBF is an efficient, reliable PoE controller from Linear Technologies that complies with the latest IEEE 802.3af and 802.3at specifications and can deliver up to 25.5 watts of power. It offers integrated surge protection and programmable current limit circuits to ensure reliable and efficient operation, even in hostile environments. Easy to install, it is the ideal choice for PoE applications where power needs to be delivered over Ethernet cables.

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