MC78LC18NTRG

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MC78LC18NTRG application field and working principle

MC78LC18NTRG voltage regulator is a linear voltage regulator based on conventional monolithic integrated circuit. It is designed for various power management applications for different kind of systems.
The maximum input voltage is 40V, and is available in TO-220, DPAK, SOT-223 and other packages. It is designed to provide a stable voltage even if the input voltage varies efficiently. The device is suitable for high-current applications. Since its function is very similar to that of 78LXX Series but with higher output current, it is widely used in some high power applications, such as LED display & driving, motor drive, digital & analog circuit and etc.

MC78LC18NTRG Working Principle

The MC78LC18NTRG voltage regulator is also known as a linear regulator because it works by regulating the output voltage with respect to the input voltage. It consists of two main parts, the control amplifier and the pass transistor. The control amplifier senses the output voltage and compares it to the reference voltage. If the output voltage is lower than the reference voltage, the pass transistor will turn on and allow current to flow from the input to the output. This in turn will increase the output voltage.

The current that flows through the pass transistor is limited by an internal current limit circuit. This prevents the pass transistor from dissipating too much power and the regulator from becoming too hot. The MC78LC18NTRG voltage regulator also has an over-temperature protection circuit, which will shut down the pass transistor if the temperature exceeds the specified operating range.

The MC78LC18NTRG voltage regulator also has a low-battery detection circuit. This circuit can be used to detect when the input voltage drops below a certain level. When this happens, the regulator will automatically shut down the pass transistor and will not allow current to flow. This prevents the output voltage from dropping too low and damaging the device connected to it.

Conclusion

The MC78LC18NTRG voltage regulator is a linear voltage regulator based on conventional monolithic integrated circuit. It is designed for various power management applications for different kind of systems. It has a max input voltage of 40V and is available in TO-220, DPAK, and SOT-223 packages. It has an efficient design which allows it to operate in high-current applications. It also has a current limit circuit, over-temperature protection circuit, and low-battery detection circuit, which help to maintain the stability of the output voltage.

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