ISL6140CB

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ISL6140CB is a Polarity Protected Hot Swap Controller for use in negative or positive Hot Swap or power distribution applications. Hot swap design and power distribution are two of the most important factors to consider in electronics system design. An efficient hot swap circuit will ensure that components and other pieces of electronics connected to a power source remain in a safe state while allowing parts to be added and removed without having to completely shut down the system. A power distribution system will provide protection to the components and devices in the system by helping to regulate the amount of power that is delivered to each portion of the system.

The ISL6140CB hot swap controller includes a polarity protected hot swap controller, linear current regulator, and power control switch which performs the critical functions of overvoltage and overcurrent detection and current limit. This controller provides a safe and controlled inrush current and incorporates a power control switch to control the system power.

ISL6140CB is specifically designed for negative or positive Hot Swap applications and provides an optimized design when implementing 2A to 7A Hot Swap designs with small form factor 3mm x 3mm QFN package. It has a shutdown pin which con be used to turn off the device even when the polarity is reversed and single wire interface which can be used to reduce the number of components and signal traces in a layout. In addition, the ISL6140CB has built-in thermal shutdown for protection of the IC itself in thermal overload situations.

The linear current regulator of ISL6140CB is the main component of the device, providing current limit and voltage control circuitry within the IC. In Hot Swap applications, the current regulator limits the inrush current to a safe level and ensures that the maximum amount of current that is delivered to the devices in the system is not exceeded. This current limit is typically set to be some percentage of the maximum output current of the linear current regulator.

The power control switch of ISL6140CB is used to enable and disable the Hot Swap device when additional loads are connected to the power bus. This power control switch monitors the voltage on the power bus and switches the power on or off as needed. The power control switch can also be used to ensure the system does not supply power if the voltage on the power bus drops below the specified minimum operating voltage of the Hot Swap device.

ISL6140CB is configured with a programmable protection circuit which provides overvoltage and overcurrent protection. The device has an external voltage divider which senses the voltage on the power bus and the output enable pin is used to enable the power control switch. The device also includes an external resistor that sets the automatic current limit.

The ISL6140CB Polarity Protected Hot Swap Controller is an excellent choice for design when powering a system or device with a negative or positive Hot Swap power supply. The integrated components and single-wire interface offer a cost effective and space-saving design. The overvoltage and overcurrent protection circuits, along with the power control switch, make the ISL6140CB an ideal choice for Hot Swap systems.

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