BA78M12CP-E2

Current - Output:	500mA
Base Part Number:	BA78M
Supplier Device Package:	TO-220CP-3
Package / Case:	TO-220-3 Cropped Leads
Mounting Type:	Through Hole
Operating Temperature:	-40°C ~ 85°C
Protection Features:	Over Current, Over Temperature
Control Features:	--
PSRR:	63dB (120Hz)
Current - Supply (Max):	6mA
Current - Quiescent (Iq):	4.5mA
Series:	--
Voltage Dropout (Max):	2V @ 500mA (Typ)
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	12V
Voltage - Input (Max):	27V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Active
Packaging:	Tape & Reel (TR)

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BA78M12CP-E2 Linear Voltage Regulators Application Field and Working Principle

Linear voltage regulators are devices that are used to convert voltages from one level to another. They are commonly used in power supplies and in electrical systems to regulate the voltages that are supplied to those systems. The BA78M12CP-E2 is a three terminal fixed output linear voltage regulator specifically designed and manufactured by Exar Corporation. In this article, we will explore the application field and working principle of the BA78M12CP-E2 linear voltage regulator.

Applications of BA78M12CP-E2 Linear Voltage Regulators

The BA78M12CP-E2 was specifically designed to meet the stringent requirements of automotive and industrial application. This regulator can be used in a variety of applications ranging from audio amplifiers, microcontrollers, DHCP servers to power supplies and cellular phones where a 12V input and an output voltage of 3.3V or 5V is required. It offers a wide range of features including protection against over-current, over-temperature and short-circuit. The BA78M12CP-E2 linear voltage regulator is built with a regulated output voltage with a low dropout voltage of 0.7V. It is designed to provide up to 0.3A at a regulated voltage of 3.3V or 5.0V. In addition, the regulator is capable of handling adaptive frequency current-mode control for more efficient regulation. This feature makes it suitable for automotive and industrial applications that require a high output current. The device also supports short-circuit protection for over-current and over-temperature conditions. The regulator is also designed to operate over a wide input voltage range from 4.5V to 40Vdc.

Working Principle of BA78M12CP-E2 Linear Voltage Regulators

The BA78M12CP-E2 linear voltage regulator works by using an internal transistor to connect or disconnect the output terminal of the regulator from the input terminal. This connection is made using a voltage divider in the form of a series combination of a resistor, zener diode, and a transistor. When the incoming voltage is greater than the output voltage, the voltage divider reduces the voltage to the required level.The voltage divider also contains a current limiting resistor and feedback path to regulate the output voltage. When the output voltage is less than the reference voltage, the transistor conducts more current through the output terminal and the feedback path increases. This increases the base current of the transistor and causes the output voltage to rise until it reaches the reference voltage.The BA78M12CP-E2 linear voltage regulator can also be used for pulse width modulation. In this mode, the transistor is used to switch the output voltage from a steady state off to an on-state and vice versa at a given rate. This helps to reduce the output voltage to a desired level.

Conclusion

The BA78M12CP-E2 linear voltage regulator is a useful device for regulating input and output voltages. It is easy to use and can be used in a wide range of applications where a stable, low-dropout output voltage is required. This regulator offers features such as over-current, over-temperature and short-circuit protection. The working principle of the regulator is based on an internal transistor that acts as a voltage divider. This device also supports pulse width modulation for efficient regulation.

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