High quality power adapter teaches you the safety specifications of power supply:
When the PC power supply is used, it may be wrongly connected or short circuited. In addition, the power supply itself may also fail, resulting in abnormal output voltage. Therefore, safety specification is a very important part in the design and manufacture of the power supply. The protection of power supply has two aspects, one is to prevent burning other accessories, and the other is to protect itself from damage.
The external protection of the power supply is mainly overvoltage and undervoltage protection, that is, when the output voltage of the power supply is too high or too low to be normal, the power supply will stop working. This is very important for the whole machine, because all expensive components, such as CPU, hard disk, etc., are relatively fragile and are easy to burn out due to excessive voltage.
To prevent this, it is necessary to monitor the output voltage of each circuit of the power supply. The power designer's method is to sample the output voltage through the sampling circuit, and the sampled signal is connected to the control part through a comparator. Once the output voltage is abnormal, the sampling signal will be reflected immediately and the control part will be informed to shut down. This can effectively protect the motherboard, CPU, memory, hard disk, optical drive and other valuable components. Whether the power supply has fast overvoltage protection is very important for the whole machine. In order to prevent burnout caused by excessive current, the power supplies are equipped with fuses.
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