L78S10CV-DG

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Linear regulators are used to provide a stable and constant DC output voltage in relation to different input voltages. This is accomplished using a series of components, including resistors, diodes, and transistors. By carefully creating a loop of regulated power, the output voltage of a linear supply can remain fixed even when the input voltage changes. The L78S10CV-DG is a popular series of low-dropout linear voltage regulator with current capability up to 10A and output voltage range from 1.2V to 20V, making it especially suitable for various power management applications such as battery charging, motor control, touchpads, medical systems and industrial equipment. In this article, we’ll take a closer look at the uses and working principles of the L78S10CV-DG.

The L78S10CV-DG contains a total of 6 distinct pins: the input voltage pin, the ground pin, the output voltage pin, the enable pin, the voltage sense pin, and the current sense pin. The input voltage pin receives the input voltage, and is then connected to the PNP transistor and the variable resistor, to a power limiting circuit and the ground pin for the rest of the circuit. The variable resistor, which is usually a variable resistor (VR), allows for manual adjustment of the output voltage of the linear regulator. The enable pin is connected to the switch, allowing for the remote on/off connection of the circuit and the power limiting circuit prevents the output voltage of the linear regulator from surpassing the programmed level, regardless of the input voltage. The voltage sense pin is connected to a voltage divider, providing a stable voltage reference to the regulator and the current sense pin is connected to the differential amplifier, providing precise current measurement and precise current control.

The working principle of the L78S10CV-DG is fairly simple. When the input voltage is higher than the programmed output voltage, the PNP transistor will be triggered, thereby passing current through the variable resistor. This causes a voltage drop across the resistor, reducing the output voltage just enough to ensure that the output voltage is the same as the programmed level. When the input voltage is lower than the programmed output voltage, then the PNP transistor will be triggered, providing a zero voltage drop, thereby allowing the input voltage to be passed onto the output. This makes it possible for the L78S10CV-DG to provide a stable and constant output voltage, regardless of the input voltage.

The L78S10CV-DG is a versatile device that can be used in a wide variety of power management applications. For example, it can be used to provide a constant DC output voltage for powering motors, touchscreens, medical devices, and industrial equipment. Additionally, it can be used for battery charging applications, as it can be remotely turned on and off and its output voltage can be adjusted via the variable resistor. Finally, thanks to its current sense pin, the L78S10CV-DG can also be used for precise current measurement and precise current control in various applications.

In summary, the L78S10CV-DG is a popular series of low-dropout linear voltage regulator with current capability up to 10A and output voltage range from 1.2V up to 20V, making it especially suitable for various power management applications such as battery charging, motor control, touchpads, medical systems and industrial equipment. The working principle of the L78S10CV-DG is quite simple; it employs a PNP transistor and a variable resistor to provide a stable and constant output voltage, regardless of fluctuations in the input voltage. It can be used for a wide variety of applications, from powering motors to precise current control. It is an ideal choice for those who need a reliable and robust power management solution.

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