The length of time a power supply can operate in regulation after failure of the AC input.
Articles Tagged: Hold up time
Set up time (ton): The time from power on to 90% of rated output voltage, or from AC powered on to operation of S.P.S. Rise time (tr): The time it takes for output voltage to rise from 10% to 90% of rated value. It is usually within 50ms. Longer period than that might lead to [...]