LTC4261IUFD#TRPBF

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PMIC - Hot Swap Controllers: LTC4261IUFD#TRPBF Application Field and Working Principle

Hot Swap Controllers are integrated circuits that are used for safely inserting and removing multiple load boards and cable assemblies into and out of systems with active buses. The LTC4261IUFD#TRPBF hot swap controller is a monolithic N-channel MOSFET gate driver with foldback current limit and control. It has the ability to select the current limit foldback behavior and has protection from load transients and over-current. The LTC4261IUFD#TRPBF can be used in applications involving multiple power rails with up to 16 channels of switching.

The LTC4261IUFD#TRPBF allows current limit foldback behavior to be adjusted automatically or manually. It has two selectable current limit reference input pins – automatic or manual selected current limit that can be configured for lower resistance foldback for improved system efficiency.Its adjustable current limit can be used to protect the load from inrush current and limited power rail current from over-current conditions. Its low input/output skew ensures good electrical performance and robustness in power rail applications.

Applications:

The LTC4261IUFD#TRPBF hot swap controller is often used in active bus applications such as xDSL, Ethernet, USB, PCI express, and SATA. It can be used for charging, power distribution, and system hot swap applications. Additionally, the device can be used in applications requiring N-channel MOSFET gate drivers and foldback current limit/control.

Working Principle:

The LTC4261IUFD#TRPBF hot swap controller works by limiting the current by using a foldback current limit and control feature. This feature monitors the voltage at the power rail and then adjusts the current limit and foldback behavior. Once the current limit is set, the N-channel MOSFET is then turned on, allowing power to be delivered to the load. If the load current exceeds the current limit, the load will be disabled and the power supply will be protected from damage.

The LTC4261IUFD#TRPBF also provides protection for transients and over-current. Transient protection is provided through the use of over-temperature and time-out detection. The time-out detection determines the time interval after which the device will disable the load if the voltage is not within expected limits. Over-current protection is provided by the adjustable current limit. Finally, the device provides diagnostic features such as open circuit, short circuit, and over-temperature detection.

The LTC4261IUFD#TRPBF hot swap controller is an ideal solution for applications such as xDSL, Ethernet, USB, PCI express, and SATA. Its adjustable current limit provides superior protection for the load and power supply and its low input/output skew ensures good electrical performance and robustness in power rail applications.

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