Dynamic input variation

In power supply circuits, this refers to the fluctuation in output voltage when the input voltage is rapidly changed within a specified range under rated conditions such as load current. It is one of the indicators that shows the stability of a power supply circuit against input fluctuations, and the smaller the dynamic input variation, the higher the stability against sudden changes in input voltage. It is useful for estimating the stability of the output voltage in applications where the commercial power supply used as the input fluctuates rapidly due to the influence of other loads.