Initial drift

In a power supply circuit, this indicates the fluctuation of the output voltage from the moment the input is turned on during rated operation until the continuous operating temperature is reached. Typically, it shows the output voltage fluctuation over a 30-minute period after power-on. It is one of the indicators of output voltage stability. It is also a type of temperature drift, and the greater the output voltage fluctuation due to temperature changes, the larger the initial drift becomes.