FQP9N50C

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The FQP9N50C is a Field-Effect Transistor (FET) made by Fairchild Semiconductor. It is a N-channel enhancement type MOSFET, meaning that it is protected from accidental electrical damage by its dual gates and has a larger capacity than other types of FETs. FQP9N50C is used in a variety of applications, including switching circuits, amplifying, phase-control and DC-DC converter circuits.

The FQP9N50C MOSFET has a striking feature of exceptionally low on-resistance (RDS(on)) and gate threshold voltage (VGS(th)) which makes it ideal for switching applications. Its very low gate charge (Qg) and gate-source capacitance (Cgs) also make it a better choice for low-frequency switching application over other FETs.

The FQP9N50C works on the basic principle of MOSFET operation. This type of FET is composed of a channel of n-type material between two p-type regions. The basic working principle is that, when the gate is given a positive electrical input (over the threshold voltage), electrons move through the n-type channel and charge neutrality is maintained by the movement of holes through the p-type material. This process decreases the resistance of the material, thus allowing current to pass through and allowing the MOSFET to amplify signals.

This MOSFET is used in multiple applications of electronic boards, from switches to amplifiers. The most prominent applications of the FQP9N50C are:

• Switch-Mode Power Supply (SMPS): The FQP9N50C can be used as a main switching element in switch-mode power supplies. Its low on-resistance (RDS(on)) at high frequency, its small gate-charge (Qg) and high-current carrying capacity (Ids) makes it suitable for high-frequency operations. This makes it ideal for use in high-voltage, high-output applications.
• DC-DC Converters: FQP9N50C is used in DC-DC converters due to its low gate charge, high-speed current rise time and voltage drops. This makes it ideal for wide input voltage range in applications with high voltage-to-current ratio.
• Motor Control: The FQP9N50C Transistor can also be used in motor control applications. Its fast switching speed, combined with its low on-resistance, makes it ideal for high-powered motors. Furthermore, its low gate charge makes it suitable for use in pulse-width modulated motor-control systems.
• Inverters: The FQP9N50C can be used in both AC and DC inverters. Its low on-resistance, improved ESD protection and its ability to switch currents rapidly make it a great choice for use in AC and DC inverters.
• Phase-Control for Heater Control Systems: The FQP9N50C has no capacitance and low on-resistance, making it ideal for use in phase-control systems. In addition, its low gate charge allows fast and controlled phase-switching.

To sum up, the FQP9N50C is an enhancement type N-channel MOSFET designed to provide low on-resistance, fast switching speed and improved ESD protection. Due to its advantages, it can be used in a variety of applications, such as switching circuits, amplifying, phase-control and DC-DC converter circuits. All these features make the FQP9N50C an ideal choice for power management and control.

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