In daily life, people deal with switches every day, almost every day will touch the switch of different objects, such as the switch of the light, the switch of the cell phone, or the switch of the TV, and in fact, the switch of these objects is nothing more than a switching power supply. However, the switching power supply that I want to introduce to you today is different from the ordinary switching power supply. With the transformation of electrification in society, the use of switching power supply is becoming more and more widespread, then switching power supply in the end what is the use of it? What are its characteristics? I'm going to give you a detailed introduction today.
What is a switching power supply
Switching power supply is the use of electronic switching devices such as transistors, field effect tubes, thyristors, etc., through the control circuit, so that the electronic switching devices constantly "on" and "off. Off", so that the electronic switching device on the input voltage pulse modulation, so as to realize the DC/AC, DC/DC voltage conversion, as well as the output voltage adjustable and automatic voltage regulation.
Characteristics of Switching Power Supplies
Switching power supplies are generally composed of pulse width modulation (PWM) control ICs and MOSFETs. With the development and innovation of power electronics technology, switching power supplies are now widely used in almost all electronic devices mainly for their small size, light weight and high efficiency, and their importance can be seen.
Categorization of switching power supply
Based on the way the switching devices are connected in the circuit, switching power supply can be divided into three main categories in general, such as series switching power supply, shunt switching power supply, transformer switching power supply. Among them, the transformer type switching power supply can be further divided into: push-pull, half-bridge, full-bridge and so on; according to the excitation of the transformer and the phase of the output voltage, can be divided into: forward excitation, flyback, single excitation and double excitation and so on.
Switching power supply applications
Switching power supply is widely used in industrial automation control, military equipment, scientific research equipment, LED lighting, industrial control equipment, communications equipment, power equipment, instrumentation, medical equipment, semiconductor refrigeration and heating, air purifiers, electronic refrigerators, liquid crystal displays, LED lighting, communications equipment, audiovisual products, security and safety equipment. Communication equipment, audio-visual products, security monitoring, LED light bags, computer chassis, digital products and instruments and other fields.
In life, the switching power supply has a wide range of applications, large military equipment, small to the family-style lamps, each object will use the switching power supply, small above also mainly introduces the classification of the switching power supply, characteristics and its main purpose, users can clearly understand that, in fact, all aspects of our lives are inseparable from the use of switching power supply, and it is also relatively easy to ignore an object. Neglect an object. The introduction of the editor to the end here, I hope that the article can help you.