LTC4258CGW#TRPBF

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The LTC4258CGW#TRPBF is a fully integrated power over Ethernet (PoE) controller designed to enable Power over Ethernet (PoE) applications, including those requiring IEEE 802.3af and IEEE 802.3at compatibility. It provides the necessary functions to supply power to remote PDs by utilizing the existing Ethernet connection. The controller also manages the current and voltage over the network cable and provides multiple protection features. It is available in a 10-pin MSOP package, making it suitable for space-constrained applications.

In PoE applications, power is transferred over the Ethernet cable from the power source (PSE) to the power device (PD). The PSE is the IEEE 802.3af-compliant device that is responsible for providing power over the network cable. The PD is the IEEE 802.3af-compliant device that is powered by the PSE. The controller is typically connected between the PSE and the PD. It provides current and voltage protection and ensures that the peak current and voltage ratings of the PD are never exceeded. In addition, the controller provides several features to help protect the PSE from current and voltage transients.

The LTC4258CGW#TRPBF has two integrated switches that allow it to detect the presence of a Class 4 PD on the network and supply power if appropriate. The controller can detect a Class 2 PD, but it is capable of supplying only a limited amount of current. The controller has overcurrent, overtemperature, and overvoltage protection functions that protect the PSE and the PD from potential damage due to current and voltage transients. It also provides power-good and fault outputs that can be used by the PSE to monitor the PD\'s performance.

In addition, the controller can be used to detect the connected PD\'s power requirements and supply the necessary current and voltage levels. The controller features adjustable current and voltage levels, allowing a wide range of applications to be powered from the PSE. The controller also includes a robust ESD protection circuit that helps to prevent ESD-induced damages to the connected PD. Finally, the controller has a built-in power management system that can be used to conserve power consumption in some applications.

The LTC4258CGW#TRPBF is an ideal solution for PoE applications that require IEEE 802.3af and IEEE 802.3at compatibility. Its wide range of features, including current and voltage protection, adjustable current and voltage settings, ESD protection, and power management capabilities make it ideal for a wide range of applications. Its compact 10-pin MSOP package makes it suitable for space-constrained applications, making it a great choice for PoE applications.

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