No matter what kind of electronic device you use, long-term use will increase the temperature. If the temperature is too high, it will inevitably affect the function of the device, and the same is true for China dc power adapter. Excessive temperature will affect the function of its internal components, resulting in instability, so China dc power adapter have overheating protection.
It is normal for China dc power adapter to heat up. The conversion efficiency from China dc power adapter to the power supply can only reach about 75-85. In addition to a small part of the waveform loss, there is also a part of the energy loss during the voltage conversion. Most of it is dissipated as heat. The more wattage China dc power adapter draws, the more energy is lost and the more heat the power supply generates.

In order to suppress the temperature rise of China dc power adapter, in addition to selecting a power MOS tube with a small leakage current and a short storage time, it is also necessary to install a heat sink for the power MOS tube. After the radiator is installed on the MOS tube, the stability of China dc power adapter is greatly improved, and the loss rate is greatly reduced. The function of the electronic switch overheating protection measures is to cut off the AC input line of the power adapter, or forcibly cut off the modulated pulse output, and stop the high-frequency vibration before the temperature of the heat-prone components rises.
If China dc power adapter has IC-controlled drive overheating protection, no external components need to be added, or only a few external components can be added to prevent overheating.