MAX5947CESA+T

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Hot Swap Controllers are power management integrated circuits (PMIC) designed to protect a circuit board and its components from exposure to too much current or voltage. They also provide a simple way to connect and disconnect a circuit from a source of power. The MAX5947CESA+T is a hot swap controller employed in a wide range of industrial, telecom, and consumer applications for current limiting and protection against inrush current when connecting a load to a power supply. The MAX5947CESA+T eliminates the need for current limiting resistors or complex circuit design and programming, taking away the problems associated with conventional solutions.

The MAX5947CESA+T includes two circuit elements: current-sense amplifier and logic control. The current-sense amplifier senses and controls the charging current through the current-sense resistor. The logic then supervises the whole process and works in conjunction with the overcurrent flag output. The logic can be programmed to initiate and control a soft-start charging cycle, and limit inrush current.

The MAX5947CESA+T\'s power supply and switching transistor are connected between the source and the load, thus all current passing through them is balanced. When the power supply is turned on, the transistor is disabled and the voltage source is coupled directly to the load bypassing the hot swap controller. When the +Vdd pin is configured to less than the Enable logic threshold, the transistor is enabled and the load is connected to the voltage source.

The MAX5947CESA+T application field includes battery charging applications, where it can be used to regulate the current to the battery, Telecom applications, where it will allow additional protection for power supplies, and IC protection for devices that may be exposed to inrush fault currents. It is also applied in server and storage applications providing protection for hard disk drives, which are particularly sensitive to power irregularities. The MAX5947CESA+T is also used in Consumer applications to reliably power and protect battery-based systems.

So, the MAX5947CESA+T is a sophisticated hot swap controller, which can prevent unexpected load disconnects and protect against inrush currents during connection. It provides significant advantages over conventional solutions, such as eliminating the need for current limiting resistors or complex circuit design and programming. Its application field ranges from battery charging applications, telecom, IC protection, server and storage applications to consumer applications, which makes it a very popular power management integrated circuit for designers.

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