Normal temperature range of power adapter

The power adapter will heat up after long-term use, but the temperature is within the normal range, so there is no danger! So, what temperature range is within the normal range? Today, the editor has compiled some relevant materials for your reference!

The conversion efficiency of power adapters can currently only reach around 75% -85%. The conversion efficiency of the power adapter is high enough, and it is currently difficult to find a better conversion method. During voltage conversion, a portion of the energy in the power adapter is lost, with most of it being dissipated in the form of heat, except for a small portion that is lost in the form of waves.

The higher the power of the power adapter, the more energy is lost, and the greater the heat generation of the power supply. That's why a desktop power supply needs to add a fan for heat dissipation. Let's calculate how much energy is lost on a 100W power adapter during use! So, when designing and producing power adapters, it is important to choose 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.

Firstly, it is necessary to design the conversion efficiency as high as possible. Secondly, switch components with low voltage drop and low loss should be selected. Thirdly, heat dissipation design should be carried out, and the heat dissipation area should be as large as possible. Power adapters with a power output of over 100W should generally have a metal perforated shell or be equipped with a heat dissipation fan.

At present, the power of laptop power adapters is generally around 60-70 W, and they are sealed with fire-resistant and high-temperature resistant plastic packaging. The heat generated inside is mainly dissipated through the plastic shell. So, the surface temperature of the power adapter is still quite high, and the highest temperature can even reach around 70 degrees! Think about the inside of the adapter, it's not as if it's on fire! So, when using a laptop, it is best to place the power adapter in a well ventilated and heat dissipating area, and never place books or other things on the power supply.