Only knowing the working principle of MOS tube can we apply this more efficient electronic component

Knowing the working principle of MOS tube can apply this higher-efficiency electronic component. As an indispensable electronic component of electronic equipment, MOS tube is also an electronic component that manufacturers need to understand.

　　

　　In fact, many manufacturers do not care about its specific role when using MOS transistors. But only by knowing its working principle and role in electronic equipment, can we choose the most suitable MOS tube according to its characteristics and the characteristics of its own products, and it can also improve the efficiency of the product and enhance itself and other products. Competitiveness.

　　

　　SOT-223 package MOS tube

　　

　　 MOS tube working principle

　　

When the gate-source voltage VGS=0, even if the drain-source voltage VDS is added, there is always a PN junction in the reverse bias state, and there is no conductive channel between the drain-source (no current flows), so the drain at this time Current ID=0. At this time, if a forward voltage is applied between the gate and the source, that is, VGS>0, an electric field is generated in the SiO2 insulating layer between the gate and the silicon substrate, and the gate points to the P-type silicon substrate. The material layer is insulated, the voltage VGS applied to the gate cannot generate a current, and a capacitor is formed on both sides of the oxide layer.

　　

The equivalent of VGS is to charge the capacitor and form an electric field. As VGS gradually increases, attracted by the positive voltage of the gate, a large number of electrons are gathered on the other side of the capacitor and form a drain to source.的N-type conductive channel. When VGS is greater than the turn-on voltage VT of the tube (usually about 2V), the N-channel tube starts to turn on and forms the drain current ID. We call the gate-source voltage when the channel begins to form as the turn-on voltage, which is generally used VT said. The magnitude of the control gate voltage VGS changes the strength of the electric field, and the purpose of controlling the magnitude of the drain current ID can be achieved.

　　

　　MOS tube application circuit

　　

　　 The most significant characteristic of MOS tube is its good switching characteristics, so it is widely used in circuits that require electronic switches, such as switching power supplies. When using a 5V power supply for low-voltage applications, if the traditional structure is used at this time, because the be of the triode has a voltage drop of about 0.7V, the actual final voltage applied to the gate is only 4.3V. At this time, there is a certain risk when we choose a MOS tube with a nominal gate voltage of 4.5V. The same problem also occurs when using 3V or other low-voltage power supplies.

　　

　　 MOS tube working principle

　　

　　Guanhua Weiye has been focusing on MOS tube for 15 years and its headquarter is located in Shenzhen. Mainly engaged in high current field effect tube, high power MOS tube, large package MOS tube, low voltage MOS tube, small package MOS tube, low current MOS tube, MOS field effect tube, package MOS tube, power MOS, MOS tube package, MOS Tube original, packaged MOSFET, etc. The main agent product WINSOK (Wei Shuo). Products are widely used in military industry, industrial control equipment, medical products, Internet of Things, smart homes, and various consumer electronic products. Relying on the advantages of the original global distributor, based on the Chinese market. Utilize perfect superior service to introduce all kinds of advanced high-tech electronic components for customers, assist various manufacturers to produce high-quality products and provide perfect service.

　　

　　 Guanhua Weiye has become one of the best and fastest-growing agents in Asia through active market development and effective resource integration. It is the common pursuit of Guanhua Group to become the most valuable agent in the world. Over the years, the company has been relying on its reputation to survive, adhering to the tenet of "Quality First, Service First", and has established good cooperative relations with many high-tech enterprises and original factories at home and abroad. It has many years of professional distribution experience. With good credit, The excellent service has won widespread trust and support. We uphold the corporate value of "attitude, quality, win-win sharing", continue to strengthen service quality, aim to provide high-quality services, and work hand in hand with suppliers to jointly develop a larger market territory and jointly contribute to the prosperity and development of semiconductors .

　　

　　Guanhua Weiye is based on diligence and abides by clear ethical standards. Adhere to the promise to the original factory, customers, employees, shareholders and society, continue our best efforts to ensure the company‘s sustainable development, and focus on making society and the world a better place through environmental protection. We also invest in global public welfare projects and undertakings, provide continuous financial support for such efforts, help disadvantaged groups acquire skills and obtain employment opportunities, and make continuous efforts for the civilization and sustainable development of society.