Dynamic input variation

In power circuits, this refers to variations in output voltage when the input voltage is suddenly 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 circuit against input fluctuations. The smaller the dynamic input variation, the higher the stability against sudden input voltage fluctuations. It is useful, for example, in estimating the stability of the output voltage when the commercial power supply used as the input rapidly fluctuates due to the effects of other loads.