With the popularization of electrical equipment, Switching Power Supply is widely used in our daily life. It is an indispensable power supply method. Then, Xiaobian will introduce the switching power supply and its application fields.
With the rapid development of power electronics technology, the relationship between power electronic equipment and people's work and life is increasingly close, and electronic equipment is inseparable from reliable power supply. In the 1980s, computer power supply fully realized switching power supply, taking the lead in completing the computer. In the 1990s, switching power supplies have entered various fields of electronics and electrical equipment. Program-controlled switches, communications, electronic testing equipment power supplies, control equipment power supplies, etc. have widely used switching power supplies, which has further promoted the rapid development of switching power supply technology. . The switching power supply is a kind of power supply that uses a modern power electronic technology to control the ratio of the time when the switching transistor is turned on and off, and maintains a stable output voltage. The switching power supply is generally composed of a pulse width modulation (PWM) control IC and a MOSFET. Compared with linear power supplies, switching power supplies increase in cost as output power increases, but the growth rates vary. The linear power supply cost is at a certain output power point, but higher than the switching power supply, this cost reversal point. With the development and innovation of power electronics technology, switching power supply technology is constantly innovating. This cost reversal point is increasingly moving to the low output power end, which provides a wide space for development of switching power supplies.
Switching power supply is the use of electronic switching devices such as transistors, FETs, thyristor thyristors, etc., through the control circuit, so that the electronic switching device is constantly "on" and "off", let the electronic switching device to the input voltage Pulse modulation is performed to achieve DC/AC, DC/DC voltage conversion, and adjustable output voltage and automatic regulation. The switching power supply is generally composed of a pulse width modulation (PWM) control IC and a MOSFET. With the development and innovation of power electronics technology, switching power supplies are widely used in almost all electronic devices due to their small size, light weight and high efficiency.
The high frequency of switching power supply is the direction of its development. The high frequency makes the switching power supply miniaturized, and the switching power supply enters a wider range of applications, especially in the high-tech field, which promotes the miniaturization and lightness of high-tech products. Turn. In addition, the development and application of switching power supplies are of great significance in terms of energy conservation, resource conservation and environmental protection.
In the field of switching power supply technology, while developing related power electronic devices, the development of switching frequency conversion technology, the mutual promotion of the switching power supply to the annual growth rate of more than two digits toward light, small, thin, low noise, high reliability, The direction of anti-interference is developing. Switching power supply can be divided into two major categories: AC/DC and DC/DC. The DC/DC converter has been modularized, and the design technology and production process have been matured and standardized at home and abroad, and have been recognized by users, but The modularity of AC/DC, due to its own characteristics, leads to more complex technical and process manufacturing problems in the process of modularization. The structure and characteristics of the two types of switching power supplies are described below.
Switching power supplies are widely used in industrial automation control, military equipment, scientific research equipment, LED lighting, industrial control equipment, communication equipment, power equipment, instrumentation, medical equipment, semiconductor refrigeration and heating, air purifiers, electronic refrigerators, liquid crystal displays, LED lamps , communication equipment, audio-visual products, security monitoring, LED light bags, computer chassis, digital products and instruments.
From the above, we can see the importance of switching power supply, and our production and life are inseparable from the use of switching power supply, interested friends can learn more about switching power supply, I hope to help everyone.
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