Generally, there are two reasons for the crash of the power supply in use.********** may be overload protection caused by instantaneous overload of the load. It is recommended to increase the output power of the power supply or modify the overload design; the second is that the temperature rise is too high and over-temperature protection occurs. Phenomenon. All of the above situations will cause the power supply to crash due to entering the protection state, and it will return to normal after the situation is lifted.