SI82391BB-IS1R

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The SI82391BB-IS1R is an isolated gate driver designed for use in a wide variety of automotive, industrial, and consumer applications, including controllers, solenoids & actuators, and power switches. It is designed to operate with very low input power, as low as 1V, making it suitable for battery-powered applications.

This isolated gate driver is a high-voltage device capable of controlling gate voltages up to 400V. It provides up to 15A of path current, which reduces switching time and provides an efficient control signal. The device is designed to be optimized for high-side and low-side switches.

One key feature of the device is its built-in galvanic isolation. The galvanic isolation ensures that the control circuit and power semiconductor remain electrically isolated from each other. This prevents ground loops from occurring, and allows the two components to operate safely and efficiently. Additionally, the isolated gate driver helps reduce electrical noise, which increases the reliability and accuracy of the system.

In terms of working principle, the device works by providing a low-power control signal to the gate of a power MOSFET. The MOSFET is then triggered and opens or closes, allowing or preventing a current to flow from the source to the drain. It does this without the control signal being affected by the power voltage. This ensures that the control is precise and reliable.

The SI82391BB-IS1R has several features designed to make it suitable for a wide variety of applications. These features include Under-Voltage Lockout (UVLO), which prevents the device from being switched on if the input voltage is too low; Over-Voltage Protection (OVP), which prevents the device from being switched on if the input voltage is too high; Over-Current Protection (OCP), which prevents the device from being switched on if the drain current exceeds the safe limit; and Thermal Shutdown (TSD), which prevents the device from being switched on if it is overheating.

The SI82391BB-IS1R is an ideal device for applications where power and control signals need to be isolated from each other, such as in automotive and industrial systems. With its low-power input and high-voltage control, it provides an efficient and reliable solution for controlling power in a variety of applications.

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