LTC4228IGN-2#PBF

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PMIC - Hot Swap Controllers

There are various power management integrated circuit (PMIC) controllers available on the market. These control the supply and distribution of power in various electronic devices. One type of PMIC controller is the Hot Swap Controller. The Hot Swap Controller is used in applications where it is necessary to “hot-swap” a component or device without powering down the host system. The LTC4228IGN-2#PBF, part of the LTC4xxx family of Hot Swap Controllers, is one of the most popular PMIC controllers on the market.

Application Field

The LTC4228IGN-2#PBFHot Swap Controller is ideal for use in applications that require high power, such as server applications. The device provides hot-swap protection for two independent voltage sources and also includes several other features that can be used to help protect the system. The device provides in-rush current protection, over current protection (OCP), over voltage protection (OVP) and short- circuit protection (SCP). It also provides independent enable and disable control, which can be used to enable or disable either source during a hot-swap operation.

Working Principle

The working of the LTC4228IGN-2#PBF Hot Swap Controller is based on the principle of two independent current-limit controllers. Each controller monitors the current of the two power supply rails and can activate a warning output if the current reaches and exceeds the set limit. If the current exceeds a higher set limit, the controller will activate the current-limit output, which will shut off the power supply to the system.

The LTC4228IGN-2#PBF also provides overvoltage and short-circuit protection. The overvoltage protection monitors the source voltage and will disconnect the outputs of the power supply if it exceeds the set limit. The short-circuit protection monitors the voltage of the power supply rails and will disconnect the outputs if the voltage drops below the set limit.

In addition to these features, the LTC4228IGN-2#PBF also includes a slew rate control. This control makes sure that the power supply does not rapidly increase its output current, as this may cause damage to the system. The slew rate control can be set to a desired rate, and it will slowly ramp up the output current until it reaches the desired value.

Overall, the LTC4228IGN-2#PBF Hot Swap Controller is a versatile and powerful PMIC controller that is well-suited for server applications. It offers protection against in-rush current, over current, over voltage and short-circuit conditions. It also provides independent enable and disable control, as well as a slew rate control. This makes it an ideal device for protecting a host system that needs to hot swap components in a safe and efficient manner.

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