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Does switching power supply selection depend on frequency or power?

Feb 23, 2022

Switching power supply is one of the power modules. It is also a very common power supply. The reason why the word "switch" is added is that it has a Schottky diode with switching characteristics. This diode has a high switching frequency and can switch off thousands of times in a short period of time. Every time, it can supply the output of power supply and current. This power supply plays an important role in general integrated circuits.


1. What are the advantages of high-power power supply?

It can output large current and has simple structure. The circuit design is not as complex as the general power module, and the matching and selection of devices is relatively single. The peripheral circuit of switching power supply is very simple. It can be realized with several cylindrical capacitors, power inductors and Schottky diodes, and its cost is not expensive. It can create a lot of high current in a short time and do well in voltage stability. High power supply is very popular in switching power supply, and they play an important role in power supply.


2. High frequency switching power supply must be good?

Obviously not. It's the same reason as the candidate's clothes. No matter how nice a dress is, but it's not the right size, will you still buy it? Large frequency switching power supply is naturally very suitable for circuits with high frequency requirements, but for very general power supply design circuits, such a complex switching power supply can not be used at all, which is obviously overqualified. It increases the cost and is likely to damage other devices.


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