STFI9N80K5

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

The STFI9N80K5, also known as N-channel enhancement mode MOSFET, is a typical field-effect transistor used in many applications such as power supply, motor control, LED lighting and audio or video circuit. As a basic component to control the flow of current, STFI9N80K5 has become very popular in consumer electronics. This article will discuss the key application field and working principle of STFI9N80K5.

Application Field of STFI9N80K5

The first and most common application of the STFI9N80K5 is the power supply. It is often used as the switching element in DC-DC converters and AC adapters, providing a low on-state resistance, and can handle large current of up to 12A. Another popular application of STFI9N80K5 is motor control, as it can control the start/stop, speed, and direction of motors. It is also used to control the power of lighting, such as LED lighting. In addition, STFI9N80K5 is also used in audio or video circuit, acting as amplifiers or voltage regulators.

Working Principle of STFI9N80K5

STFI9N80K5 is an N-channel Enhancement-Mode MOSFET, which works on the basis of an insulated gate. The N-channel refers to the positive voltage required to open the gate, while the Enhancement-Mode describes the functionality of the MOSFET as a switch. The structure of the device consists of various components, including the source, drain, gate and substrate. When the gate is left floating or given a negative voltage, electrons in the substrate are attracted and the gate-source voltage is increased. When the gate is given a positive voltage, the electrons are repelled and the gate-source voltage is decreased, thus turning off the device.

Since the gate is insulated from the source and drain, the MOSFET requires no direct current to operate. Furthermore, the gate voltage of the STFI9N80K5 can be as low as 4 volts, allowing the device to be driven using logic circuits. Together with its low on-state resistance and high switching speed, STFI9N80K5 has become one of the most popular MOSFETs used in many consumer electronics.

Conclusion

In conclusion, the STFI9N80K5 is a typical N-channel MOSFET device that is widely used in many applications such as power supply, motor control, LED lighting and audio or video circuitry. The working principle of the STFI9N80K5 is based on the insulated gate that requires no direct current for operation, and its low gate voltage allows for logic-level control. With its low on-state resistance and high switching speed, the STFI9N80K5 is one of the most popular MOSFETs available.

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