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HOME >> What is the difference between switching power supply and normal power supply?
What is the difference between switching power supply and normal power supply?
Source: | Author:pmo89cafb | Published time: 2020-11-02 | 4194 Views | Share:

The linear power supply is not the same. Because there is no switch intervention, the water supply pipe has been discharging water. If there is too much, it will leak out. This is what we often see in some linear power supply. The heat generated by the regulating pipe of some linear power supply is very large, and the unused electric energy is converted into heat energy. From this point of view, the conversion efficiency of linear power supply is very low, and when the heat is high, the life of the components must be reduced, which will affect the final use effect.

Main difference: working style


The power regulator of linear power supply always works in the amplification region, and the current flowing through it is continuous. Due to the large power loss on the regulating tube, a large power regulating tube is required and equipped with a large radiator. The heating is serious and the efficiency is very low, which is generally 40% ~ 60% (it is also a good linear power supply).
Because of the working mode of linear power supply, there must be a voltage device for changing from high voltage to low voltage. Generally, it is a transformer, and there are other power sources like KX, which output DC voltage after rectification. In this way, it has a large volume, bulky, low efficiency and high calorific value, but it also has advantages: small ripple, good adjustment rate, small external interference, and suitable for analog circuits / amplifiers.