LT4275CHMS#TRPBF

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Power over Ethernet (PoE) controller provides power over Ethernet cables and is the ideal solution for powering most types of power-hungry devices. With its compact size, it can be used in tight spaces where space is limited.

The LT4275CHMS#TRPBF is an integrated PoE controller with numerous features. It is designed to support standard IEEE 802.3af Class 0 and IEEE 802.3at Class 4 PoE applications. This PoE controller integrates a single-channel DC/DC converter, two programmable bias regulators, and a few user-selectable power management functions into a single device. It is capable of managing two independent loads while supporting IEEE 802.3at Class 4 power sourcing requirements.

The LT4275CHMS#TRPBF is a highly efficient, low power consumption device. The power efficiency is maximized by using a 1.2V fixed internal reference voltage and a single external resistor divided into two cascaded resistors, one for current and one for voltage regulation. It boasts an extremely low quiescent current of only 3µA in standby mode, and it includes a power control switch for additional power savings. It can be triggered via an enable pin for fast startup. It also features an integrated voltage detector for detecting single- and multi-polarity operations and works with a wide range of input voltages, from 6-30 volts.

The LT4275CHMS#TRPBF has several features that make it ideal for PoE applications. It has built-in short-circuit, over-current, board-temperature-monitoring, and thermal-overload protection, providing superior circuit protection. It also offers built-in polarity reversing and load peer-to-peer detection capabilities, allowing it to automatically detect and correct the swap of the positive and negative wires of the DC power lines.

The working principle of the LT4275CHMS#TRPBF is simple and straightforward. It takes a regulated PoE voltage from the power source, and then reduces the voltage to a precise level using the integrated DC/DC converter and voltage regulator. The voltage is then divided into two regulated outputs by the bias regulator and power control switch.

The LT4275CHMS#TRPBF is an ideal and cost effective solution for a variety of PoE applications. It is well suited for networking and communication applications that have limited power sources and require high efficiency, low power consumption, and robust protection.

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