What is a power adapter? I believe everyone has used a power adapter, so you must know that it generates heat during use. During the development stage of a power adapter, various parameter performances are tested and evaluated, and temperature is one of them. Generally, the surface temperature rise of a power adapter is controlled within 30-35℃. As we all know, power adapters are used indoors, so the indoor temperature usually does not exceed 40℃, and it is normally around 25℃.

Even at temperatures up to 40℃, the temperature of the power adapter's casing remains below 75℃. The casing can withstand temperatures around 100℃, while the nameplate sticker can withstand temperatures around 80℃. Therefore, 75℃ is almost the limit. In fact, as long as the temperature of the power adapter is within the design range, that is, within the normal range, there is generally no danger!

Reasons for power adapter heating

It is normal for a power adapter to generate heat. Currently, the conversion efficiency of a power adapter to power can only reach around 75-85%. When converting voltage, a portion of energy is lost. Apart from a small amount lost in the form of waves, most of it is dissipated in the form of heat. The higher the power of the power adapter, the more energy is lost, and the greater the heat generated by the power supply.

Currently, power adapters on the market are all sealed and encapsulated with fire-resistant and high-temperature resistant plastic. The heat generated inside is mainly conducted and dissipated through the plastic casing. Therefore, the surface temperature of the power adapter is still quite high, with the maximum temperature even reaching around seventy degrees!

Solutions to power adapter overheating

1. Select switching components with low voltage drop and low loss, and ensure that the heat dissipation area is as large as possible. Switching power supplies with a power rating of 100W or higher should generally have metal perforated enclosures, or be equipped with cooling fans.

2. Try to place the power adapter in a well-ventilated and well-cooled area. Never place objects such as books on top of the power supply.

3. When using a laptop in a high-temperature environment, the laptop power adapter should be placed in a shaded and ventilated area; avoid placing the power adapter near the laptop's cooling vents, as this will not only prevent the power adapter from dissipating heat but also cause it to absorb some of the heat. The above is a detailed analysis of the reasons why power adapters heat up, hoping to help everyone understand the causes so that they can better use their power adapters.