Why does the power adapter heat up?
Aug 22, 2018| What kind of temperature range is within the normal range? The conversion efficiency of switching power supplies can only reach about 75%-85%. The answer is here. The conversion efficiency of the switching power supply is high enough, and it is still difficult to find a better conversion method.
When designing and manufacturing switching power supplies, be sure to select high temperature resistant components. Of course, it is necessary to control the temperature of the power supply within the allowable range of the application environment.
When the switching power supply is performing voltage conversion, a part of the energy is lost. Except for a small part of the loss in the form of waves, most of it is emitted in a thermal manner. The power of the switching power supply is lacking, and the energy lost is also lacking, and the heat generated by the power supply is lacking.
This is why the desktop power supply needs a fan to dissipate heat. We might as well calculate a 100W switching power supply, how much energy loss is used in the use!