Input noise tolerance

One of the values that indicate the performance of a power supply device. It represents the maximum level of noise, such as that included in the input voltage, that the power supply can withstand while maintaining normal operation. By applying pulse-shaped voltage, simulating noise, overlaid on commercial power to the input terminals of the power supply, and gradually increasing the pulse voltage, the maximum pulse voltage at which normal operation can still be maintained is measured. The larger this value, the higher the resistance to noise contained in the input.