What are the advantages and disadvantages of switching power supplies and linear power supplies?

Advantages of linear power supply: there is no switching device in the circuit, so there is no switching noise and the output is very clean.

Linear power supply has more disadvantages, as follows:

1, can only step-down voltage;

2, can only do the same voltage polarity conversion;

3, the input and output can not be achieved isolation;

4, it is difficult to realize the multiple outputs;

5, low efficiency, transistor losses;

6, input voltage Narrow range;

7, great heat generation;

8, large size.

Advantages of switching power supply:

1, high efficiency, ideally no power loss;

2, small size, the increase in frequency brings miniaturization of the volume;

3, can be step-down or step-up output;

4, the input and output are easy to isolate;

5, it is easy to realize the multiple output;

6, Can output negative voltage;

7, input voltage range is very wide.

The disadvantages of switching power supply, the main one, namely: there is output noise, electromagnetic radiation than linear power supply.