EVM-3WSW80B12

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Trimmer Potentiometers are a specialized type of variable resistor with a fixed total resistance, designed to provide the user with an adjustable output voltage. The EVM-3WSW80B12 is a popular model of such a Trimmer Potentiometer, and offers a wide range of applications and a unique working principle.

Application Field

The EVM-3WSW80B12 is a three-terminal device, with the centerterminal serving as the adjustable voltage output and the two exterior terminals serving as ground and power sources. This Trimmer Potentiometer is most commonly used in voltage stabilization and audio frequency control. It is suitable for applications such as temperature and humidity control, DC-DC converters, and radio and television equipment.

The EVM-3WSW80B12 provides an adjustable output voltage range of approximately 2.2 to 3.7 volts. This is a useful feature when a precise output voltage is needed. The device also has a relatively low output impedance and good temperature stability, making it suitable for use in a variety of environments.

Working Principle

The EVM-3WSW80B12 works on the principle of positive temperature coefficient (PTC). This means that the resistance of the device increases as the temperature of the environment rises. This is beneficial for applications requiring temperature compensation, as it ensures the output voltage remains constant regardless of temperature fluctuations.

The device operates using a single 10-turn screw adjuster. As the adjustment is increased, the resistance of the device increases. This results in a decrease in the output voltage of the Trimmer Potentiometer, providing the user with an adjustable output voltage range of approximately 2.2 to 3.7 volts. The output voltage can be adjusted in small increments, making the device ideal for precise applications.

A further advantage of the EVM-3WSW80B12 is its low current draw. This makes it suitable for use in portable and low-power electronics, such as digital cameras, computers, and mobile phones.

Conclusion

The EVM-3WSW80B12 is an exceedingly versatile Trimmer Potentiometer, offering an adjustable output voltage range and low power consumption. It is suitable for applications such as voltage stabilization, temperature and humidity control, and radio and television equipment. The device operates on the principle of positive temperature coefficient, resulting in a constant output voltage regardless of environmental fluctuations.

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