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NJM7906FA Application Field and Working Principle

NJM7906FA is a linear voltage regulator, which belongs to Power Management IC (PMIC) category. It is widely used in fields such as computers, automotive electronics and power supply design. It is widely used because of its wide input voltage, low voltage drop and low noise.

Input Voltage

The typical input range of NJM7906FA is 2.5V to 24V, and the maximum input rating is 40V. This wide input range allows NJM7906FA to be used in many different applications from low voltage to high voltage.

Output Voltage

The output voltage of NJM7906FA is adjustable from 0.8V to 24V within 1% accuracy. It has a high PWM/Load Regulation with a maximum drop out of 0.2V. In addition, the accuracy of its voltage output is very high, with a maximum error of +-1%.

Noise Performance

NJM7906FA has a low noise performance. It has a noise voltage that is lower than 1mV when it works in 1kHz-10kHz band, and lower than 50uV when working in the 10kHz-100kHz band. This makes the NJM7906FA a suitable Linear Voltage Regulator for many audio and sensing applications.

Applications

NJM7906FA is widely used in various applications. It can be used as a primary regulator for computer processors and as a secondary regulator for motherboard power. It is also used in automotive applications, such as car audio systems and power window regulators. It can also be used in power supply design and LED lighting applications.

Working Principle

NJM7906FA is a linear voltage regulator that works on the Zener-Diode principle. It consists of a series regulator circuit and a shunt regulator circuit. The series regulator circuit consists of an NPN transistor and a Zener diode. The transistor acts as a variable resistance which controls the amount of current flowing through the Zener diode, and the Zener diode acts as a voltage reference. The voltage reference determines the output voltage of the regulator. The shunt regulator circuit consists of a PNP transistor and a variable resistor. The variable resistor adjusts the amount of current flowing through the PNP transistor, and the PNP transistor acts as a voltage regulator. The output voltage is determined by the voltage reference created by the variable resistor.

Conclusion

NJM7906FA is a linear voltage regulator belonging to the PMIC category. It has a wide input voltage range and a wide output voltage range. It has a low voltage drop, low noise, and high PWM/load regulation. It is widely used in various applications such as computers, automotive electronics, power supply design and LED lighting applications. The NJM7906FA works on the Zener-Diode principle. It consists of a series regulator circuit and a shunt regulator circuit that adjust the output voltage by controlling the current flowing through the Zener diode.

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