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Why is switching power more popular?

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Why is switching power more popular?
Issue Time:2020-04-21

Why is switching power more popular?

Today this article will introduce to you why to buy a Switching power supply, you choose is the switch power supply, why not choose the ordinary power linear power supply?


Switch power supply is popular because of its high efficiency, light weight, can boost, buck and other benefits, but because of its power, so its noise will be larger.

Switching power supply is currently in constant improvement and improvement, more and more switching power supply are more efficient than ordinary power supply, switching power supply is generally composed of pulse width modulation (PWM) control IC and MOSFET, so that almost all the electronic equipment in the world have used switching power supply.

Switching power supply is a relatively linear power supply, its input will be direct alternating current rectification into direct current, and then in the action of the high-frequency oscillation circuit, with the switch tube to control the current on and off, the formation of high-frequency pulse current. With the help of inductance (high frequency transformer), output steady low voltage dc.

As the magnetic core size of the transformer is inversely proportional to the square of the working frequency of the switching power supply, the higher the frequency is, the smaller the core is. This can greatly reduce the transformer, so that the power supply weight and volume. And because it directly controls dc, it is much more efficient than linear power. This saves energy, so it is favored by people. But it also has the disadvantage that the circuit is complex, the maintenance is difficult, the pollution to the circuit is serious. The power source is noisy and is not suitable for some low noise circuits.


According to the connection mode of switching devices in the circuit, switching power supply can be generally divided into three categories: serial switching power supply, parallel switching power supply and transformer switching power supply. Among them, the transformer type switching power supply can be further divided into: push-pull type, half bridge type, full bridge type and so on. According to the excitation of the transformer and the phase of the output voltage, it can be divided into: positive excitation type, flyback type, single excitation type and double excitation type.

Kulon electronics is the global distributor of MeanWell switching power supplies, providing all MeanWell switching power products and models.

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