LTC4267IGN#TRPBF

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The LTC4267IGN#TRPBF is a highly integrated...Power Over Ethernet (PoE) Controllers PMIC. It is designed for robust and cost-effective Power Over Ethernet (PoE) applications. The device combines the PoE PSE controller with isolated dc/dc and ac/dc power conversion, signal conversion and per-port power control into a single integrated solution. This greatly reduces the number of external components required to build an application while providing optimal performance. The device also includes an advanced active current sharing architecture that is capable of smoothly shifting current between multiple port nodes so that the system load can be effectively balanced. It is a very efficient, low-cost solution for PoE applications.The device has several features that suit the application field of a PoE controller. It includes a wide input range of 9V to 56V, which can accommodate large differences between the voltage sources used in PoE networks. It also supports up to 6 IEEE 802.3at Type 1 ports, allowing for up to 98W of power delivery. The onboard temperature sensing circuit ensures that the device is not subject to thermal-shutdown at high levels of power dissipation. Additionally, it supports IEEE 1588 for accuracy and reliability in time synchronization.The LTC4267IGN#TRPBF\'s working principle is based on a number of integrated components that work together to perform the desired power conversion and management tasks. The device has an onboard Buck-Regulated Power Supply (BRPS) to convert the incoming supply voltage to the regulated output voltages of the PoE ports. This includes two voltage regulation loops that manage the lossless current shunt in order to ensure the desired power delivery. It also has an A/D converter to monitor the current delivered per port and to adjust the BRPS output to compensate for any voltage drop. Additionally, the device features dedicated circuitry for detecting and recognizing the various PoE classes and to shut down the port accordingly in the event of an under-voltage or over-current condition.The LTC4267IGN#TRPBF has several features that make it an attractive PMIC solution for a wide range of PoE applications. It combines power conversion, current sensing and ports protection into a single cost-effective device. It also has wide voltage input range and support for up to 6 IEEE 802.3at Type 1 ports with up to 98W of power delivery. The onboard temperature sensing circuitry offers robust protection against damaging thermal conditions and the support for IEEE 1588 offers greater accuracy and reliability in time synchronization. As such, the LTC4267IGN#TRPBF is an ideal solution for cost-effective, highly efficient PoE applications.

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