MC7809CT-BP

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

MC7809CT-BP is a three-terminal adjustable regulator type device. It has a wide range of application fields, which include all types of portable, household, commercial and industrial electrical equipment and instrumentation. Its main purpose is to provide a regulated voltage output. The device is typically used in applications where a regulated voltage source is needed, such as in portable and desktop PCs, CD/DVD players, radio and television sets, and other systems where fairly precise voltage regulation is needed.

Functionality and Features

This device features a high input voltage up to 18V, low output voltage as low as 1.25V and an adjustable range from 1.25 to 17V. The MC7809CT-BP has an output voltage accuracy of ±5%. It also provides temperature stability of +2.0 mV/°C. Output current up to 1.5A is possible. The device is rated to operate over a -40°C to +85°C temperature range.

The device includes short circuit protection, reverse polarity protection and current limiting protection. It also has a low power-on reset feature, which ensures that the output voltage is not less than 90% of rated output when the power is applied. The device uses an internal PMOS pass element for low power applications. Transients response is also fast.

Working Principle

MC7809CT-BP is a linear voltage regulator, which works on a simple principle. It takes in an unregulated DC voltage and produces a regulated output voltage at its output port. The voltage regulator works on the principle of negative feedback control, in which the output voltage is fed back to the input terminal in the form of a negative feedback signal. This feedback signal is compared with the reference voltage and the error signal is amplified. The amplified error signal is then used to control the input voltage applied to the device. When the output voltage rises above its reference voltage, the device will cut off the input voltage supply and regulate the voltage at its reference voltage.

The voltage regulator consists of an output amplifier, a feedback network, a reference source and an error amplifier. The reference source provides a reference voltage to the error amplifier and the feedback network provides a feedback signal to the input terminal. The error amplifier compares the reference voltage and the feedback signal and creates an error signal based on the difference between the two. This error signal is passed to the output amplifier, which then adjusts the output voltage according to the error signal.

Conclusion

MC7809CT-BP is a three-terminal adjustable regulator type device that produces a regulated output voltage. Its application fields include all types of portable, household, commercial and industrial electrical equipment and instrumentation. Its main work principle is to provide a regulated voltage output by taking an unregulated DC voltage and producing an output voltage at its output port by means of a negative feedback control scheme.

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