U78L21N

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

The U78L21N current-limiting series is an integrated voltage regulator that is used in a variety of applications. It is typically used in low power applications, such as for power supplies, battery chargers, and other low-power needs. This series of voltage regulator has the unique ability to limit the output current to a predetermined level. This can prevent damage to connected circuits, as well as ensure precise voltage regulation.

The U78L21N includes an internal current-limiting resistor along with an adjustable current-limiting LED. This allows the user to set the maximum current output. The current-limiting resistor is adjusted by the turning of a rotary encoder in the back of the device. The adjustable current-limiting LED can be adjusted with a potentiometer also located on the back of the device.

The working principle of the U78L21N is that it regulates the output voltage to maintain a constant voltage level, the maximum voltage being set by the adjustable current limiting LED. The LED and current-limiting resistor work in combination to limit the current to a predetermined level. This is important to ensure the safety of the connected circuits or components which may become damaged by too much current.

The U78L21N has many applications, such as for laboratory power supplies, medical equipment, and integrated circuit chipsets. It is also used for computer peripherals such as printers, scanners, and other devices. The device has the ability to operate in both line and load regulation. This helps to prevent current overloads and voltage overshoots. The U78L21N can also be used as a voltage regulator for low power needs. This is particularly useful in applications such as battery chargers, where precise voltage regulation is necessary to ensure the battery is charged to the appropriate level.

The U78L21N series of voltage regulator can provide stable performance in a variety of conditions. Its adjustable current-limiting LED and current-limiting resistor make it a versatile and reliable product, as it can be used in a variety of applications that require precise voltage regulation. This makes the U78L21N an attractive choice for many types of projects.

The specific data is subject to PDF, and the above content is for reference