3224G-1-105E

Trimmer Potentiometers

A trimmer potentiometer, also known as a trimmer or preset, is a three-terminal resistor with a sliding contact that forms an adjustable voltage divider. Trimmer potentiometers are typically used in applications where precision adjustment of resistance is required. The 3224G-1-105E trimmer potentiometer is a 3-pin device with an off-set screwdriver slot size of 4.5 mm, making it one of the most popular sizes of trimmer potentiometers available.

The main application of the 3224G-1-105E trimmer potentiometer is for controlling the constant current output of switching power supplies. This type of trimmer is capable of controlling the voltage drop between two points by adjusting its resistance. It is especially accurate and provides a way to adjust the actual output voltage without the need for an external trimming resistor.

Working Principle of 4824-"1" Trimmer Potentiometer

The 3224G-1-105E trimmer potentiometer works by adjusting the resistance between the three pins to control the current. The adjustment of the resistance is done using a screwdriver inserted into the middle pin, allowing the contact point to move between the two outer pins. The resistance between the two outer pins is affected by the position of the contact point, thus adjusting the voltage drop and, in turn, the current output.

The trimmer potentiometer is constructed from a coil wound around a ferromagnetic core, which acts as a sort of rheostat and is connected to the two outer pins. The third pin is connected to a control knob which adjusts the contact point along the length of the coil. As the contact point moves, the resistance value changes, resulting in a changing voltage drop and current output. The accuracy of the adjustment is determined by the precision of the contacts and the sensitivity of the control knob.

The 3224G-1-105E trimmer potentiometer is ideal for applications requiring precise output voltage control. It is widely used in the design of LED driver circuits, DC/DC converters, and other power supplies where adjustable output current is required. The device is also well suited for use in power amplifiers, where control of the bias current can be adjusted very accurately.

Conclusion

The 3224G-1-105E trimmer potentiometer is a three-terminal resistor with an adjustable voltage divider. It is primarily used for regulating the output voltage of switching power supplies, LED drivers, and other power circuits. The device works by adjusting the resistance between its three pins using a screwdriver inserted into the middle pin. The accuracy of the adjustment is determined by the precision of the contacts and the sensitivity of the control knob. The 3224G-1-105E is an ideal device for precise control of output voltage in a wide variety of applications.