source:Industry News Popular:adapter release time:2022-03-12 09:47:16 Article author:sznbone
The conversion efficiency of switching power supply can only reach about 75%-85% at present. The conversion efficiency of the power adapter is high enough, and it is difficult to find a better conversion method at present. When the power adapter performs voltage conversion, part of the energy is lost, and most of it is dissipated in the form of heat except for a small part of the loss in the form of waves.
The greater the power of the power adapter, the more energy is lost, and the greater the heat generated by the power supply. This is why the desktop power supply needs to add a fan to dissipate heat. We might as well calculate how much energy is lost in a 100W power adapter during use! Therefore, when designing and producing power adapters, we must choose high temperature resistant components. Of course, the temperature of the power supply must be controlled within the allowable range of the application environment.
First, the conversion efficiency should be designed as high as possible. Second, switching components with low voltage drop and low loss should be selected. Third, the heat dissipation design should be carried out, and the heat dissipation area should be as large as possible. There should be a metal perforated case, or add a cooling fan.
The power of the current notebook power adapter is generally around 60 to 70 W, and it is sealed with fireproof and high temperature resistant plastic. The heat generated inside is mainly dissipated by conduction through the plastic shell. Therefore, the surface temperature of the power adapter is still quite high, and the maximum temperature will even reach about 70 degrees! Think about the inside of the adapter, it is not like a fire! Therefore, when you use a laptop, try to keep the power The adapter should be placed in a place with good ventilation and heat dissipation. Never place books or the like on the power supply. As for that hot feeling, you don't have to worry about it, it's the power supply, and it's strange that it doesn't get hot!
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