Description of the use of switching power supply

With the rapid development of power electronics technology and the switch industry, the relationship between power electronic equipment and people's work and life is becoming increasingly close, and electronic equipment cannot do without reliable power supply. In the 1980s, computer power supplies were fully realized as switch power supplies, and the power supply replacement of computers was completed first. In the 1990s, switch power supplies were successively introduced into various electronic and electrical equipment fields. Programmable switches, communications, electronic testing equipment power supplies, control equipment power supplies, etc. have been widely used in switch power supplies, which has promoted the rapid development of switch power supply technology. Switching power supply is a power supply that uses modern power electronics technology to control the time ratio of switching transistors to open and close to maintain a stable output voltage. Switching power supply is generally composed of pulse width modulation (PWM) control IC and MOSFET. Compared with switching power supply and linear power supply, the cost of both increases with the increase of output power, but the growth rate of the two is different. The cost of linear power supply is higher than that of switching power supply at a certain output power point, which is the cost reversal point. With the development and innovation of power electronics technology, switching power supply technology is constantly innovating, and this cost reversal point is increasingly moving towards the low output power end, which provides a wide range of development space for switching power supply.
The high frequency of switching power supply is its development direction. High frequency makes the switching power supply smaller and allows the switching power supply to enter a wider range of applications, especially in the field of high-tech, which promotes the miniaturization and lightness of high-tech products. In addition, the development and application of switching power supply are of great significance in saving energy, saving resources and protecting the environment.