L7812ACV

With the development of integrated circuit (IC) technology, linear voltage regulators, or linear power supply, which provide constant or variable output voltage with a variety of solutions, are widely used in various electronics applications. L7812ACV is one of them. This article will focus on the application field and working principle of L7812ACV.

Application Fields of L7812ACV

L7812ACV is a three-terminal negative linear regulator. It is a fixed voltage regulator IC, designed to deliver up to 1.5A of current to the output voltage at 12V fixed voltage with a typical dropout voltage of 2V. Because of the large current capability and low voltage drop, the L7812ACV are widely used in many electronics projects. With its fixed output, it can be used to design voltage power supplies. Furthermore, it can also be used in battery-powered applications when there is a need to improve the battery life, such as in laptop computers, PDAs, MP3 players, etc.

In addition, L7812ACV has been widely applied in the field of science and technology. It is applicable to instrumentation systems, telecommunications, computer peripherals, automotive electronics, household equipment and other related electronic applications.

Working Principle of L7812ACV

The L7812ACV is based on the Positive Voltage Regulator (PVR) or the Standard Voltage Regulator (SVR) concept with internal current and thermal limit. It is designed to provide a regulated output voltage with a minimum of external parts.

The L7812ACV has two internal power transistors. The input voltage is connected to the base of the first transistor. The collector of this transistor is connected to the base of the second transistor. The output voltage is provided across the collector of the second transistor and the emitter of the first transistor. A voltage divider consisting of two resistors is connected between the output terminal and the emitter of the first transistor. This voltage divider is used to set the output voltage. The accuracy of this voltage is determined by the voltage rating of the resistors and the properties of the transistors. The transistors and resistors both provide current and thermal protection.

In summary, L7812ACV is a three-terminal negative linear regulator with fixed output voltage providing up to 1.5A of continuous current. It is widely used in various electronics applications. Furthermore, it has been applied in the field of science and technology. It has a simple working principle which consists of two power transistors and two resistors which is used to set the output voltage.