ISL61851KCBZ

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PMIC (Power Management Integrated Circuit) is a type of integrated circuit that commands, controls and coordinates the distributed power systems in electronics. Hot swap controllers are one of the many different types of PMICs and can be used in power circuit design, power system design and managing the power in a system. One example of a hot swap controller is the ISL61851KCBZ.

The ISL61851KCBZ is a voltage supervisor and hot swap controller with an output selectable from 1.7V to 4.63V. It has a built-in error amplifier, 1.5A linear regulator, input/output regulator, and pin programmable current limit. The device contains a 10V-26V VCC input and single-pin VCC selectable output voltages. It also has a thermally shutdown and output discharge circuits to protect against overvoltage and overcurrent faults.

Foremost, the ISL61851KCBZ can be used in applications where a stackable power connector is necessary. The 10V-26V VCC input allows the device to be connected to a variety of different power sources, such as traditional AC power supplies, batteries, or other DC supply sources. It is primarily used for voltage and current management in computer systems and communication products, where reliable hot swap control is a necessity.

The ISL61851KCBZ hot swap controller device uses a programmable current limit with adjustable protection thresholds. This allows the output to remain in regulation when the load current is greater than the programmed limit. When the current exceeds the limit, the device will automatically shut down and turn off the output and reset the device, safely maintaining the system’s integrity. Additionally, the open drain and floating output also provide a means to protect against overvoltage and overcurrent faults.

The ISL61851KCBZ also has a built-in thermal shut-down circuit which indirectly protects against short-circuit and over-temperature conditions. This is made possible through the tight integration of the MOSFET and small package size, enabling the device to detect the temperature of the die and disconnect the output when it exceeds the maximum operating temperature.

More features include diagnostic functions that enable system designers to monitor for faults. This is possible due to the integrated error amplifier and comparator which monitors the output voltage and provides an output state flag. This flag can then be used as a diagnostic tool to identify a fault before it occurs. The ISL61851KCBZ also provides logic-level outputs to integrate with system-level monitoring and control.

In conclusion, the ISL61851KCBZ hot swap controller is an essential component used in distributed power systems to safely manage the power in a system. By providing input/output protection, pass-position detection, current limit, and thermal shut-down, the ISL61851KCBZ ensures that system designers can safely enhance the performance of their products without burdening them with excessive over-current, over-temperature or over-voltage faults.

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