MC7912BT

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

PMIC (Power Management Integrated Circuit) integrated circuits are exclusively used for power management in electronic equipment. The category Voltage Regulators - Linear includes various integrated circuits that are able to convert an input voltage to an output voltage with a desired level. Among these is the MC7912BT integrated circuit, which is a three-terminal, fixed-voltage negative regulator. This article will discuss the MC7912BT application field and working principle.

Application Field of the MC7912BT

The MC7912BT integrated circuit is usually used for generating negative supplies for bipolar power transistors. The input voltage of the MC7912BT can range from 6 volts to 40 volts, with its output voltage set to a negative 12 volts. Additionally, its temperature range spans from -40°C to 125°C. Other features of the MC7912BT include a maximum output current of 1.5A, a thermal protection function, and short circuit protection.

The MC7912BT integrated circuit is commonly used in the automotive electronics industry. It is able to provide negative power supply for voltage tuning and other automotive systems, including car radios and navigation systems. For example, the MC7912BT is often used to ensure optimal operation in a car stereo\'s audio amplifier, such as providing a stable current and voltage output of -12 Volts. It is also used in audio preamps and crossovers.

Working Principle of the MC7912BT

The MC7912BT is an integrated circuit designed to regulate an input voltage to a fixed negative output voltage with a certain level of current. The MC7912BT utilizes a negative output voltage terminal, an input voltage terminal, and a ground terminal. The input voltage that is regulated by the MC7912BT is connected to the input voltage terminal and the regulated negative output voltage is connected to the output voltage terminal. The ground terminal of the integrated circuit is connected to the same ground plane as the device being supplied with the regulated voltage. When the input voltage is applied to the input terminal, a negative output voltage is created at the output terminal with a relatively constant current.

The working principle of the MC7912BT consists of two major stages. The first stage is the voltage control stage, which adjusts the output voltage according to the input voltage. The voltage control stage is responsible for setting the negative output voltage of the integrated circuit to the desired level. The second stage is the current control stage, which ensures that the current being supplied to the external components connected to the output voltage is not exceeded. The current control stage makes sure that the current dissipation of the circuit does not exceed the thermal protected threshold.

Conclusion

The MC7912BT is a three-terminal, fixed-voltage negative regulator, primarily used for providing negative power to bipolar power transistors. Its operating temperature range spans from -40°C to 125°C and its input voltage ranges from 6 volts to 40 volts. The MC7912BT integrated circuit is usually used for generating negative supplies for voltage tuning and other automotive systems. The working principle of the MC7912BT consists of two major stages: the voltage control stage, which adjusts the output voltage according to the input voltage, and the current control stage, which ensures that a constant current is supplied to the external components connected to the output voltage.

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