LM1949N/NOPB

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LM1949N/NOPB is a 4-channel, high-side, current-limited power switch design, specifically meant for automotive applications

The N-Channel MOSFET output configuration makes it very convenient for wide-variety of power delivery and control applications, where current and voltage regulation is paramount. This device was designed to provide controlled power delivery together with adjustable protection against overload and short-circuit scenarios.

For applications requiring protection against short-circuits, the LM1949N/NOPB offers a fold-back current-limited feature, able to automatically reduce the load current in the event of excessive overload, making the device very safe to use. The adjustable threshold and slope settings of the current-limiting feature make it well suited to a variety of applications where a high degree of current shutdown accuracy is desired.

The LM1949N/NOPB offers highly configurable “flyback” operation, a feature which allows efficient power delivery to the load while also providing a high degree of protection against excessive current and/or transients. With its wide range of configuration possibilities, it can be used to control the output voltage or current in automotive electrical systems, such as in applications involving motors, alternators and solenoids.

The LM1949N/NOPB is also very useful for pulse-width-modulated (PWM) applications, as it offers variable trimming capabilities for controlling the output voltage; this allows for a higher degree of accuracy and precision when controlling the output current. The adjustable timing function also enables the use of this device as a variable-speed motor drive controller.

The LM1949N/NOPB power switch design has several advantages that make it an appealing solution in automotive applications. It can be used to control a wide range of electrical loads, it is able to provide high-side power switching, and its adjustable current limiting, fault protection and flyback characteristics make it highly suitable for use in a variety of power management applications.

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