Classification and application of switching power supply

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Classification and application of switching power supply [Copy link]

With the rapid development of power electronics technology, the relationship between power electronics 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 supply fully realized switching power supply, and took the lead in completing the power supply replacement of computers. In the 1990s , switching power supply has successively entered various electronic and electrical equipment fields. Program-controlled switches, communications, electronic testing equipment power supplies, control equipment power supplies, etc. have widely used switching power supplies, which has promoted the rapid development of switching 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. At a certain output power point, the cost of linear power supply is higher than that of switching power supply, 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.