i picked up a homemade power supply from a swap meet recently and just opened it up to see how it works. it uses an LM338 as a voltage regulator at 22V and the transformer has a 24V/50VA secondary.
according to the datasheet, LM338 is rated for 5A and limits current at 12A. if my transformer is rated 50VA at 24V then doesn't that mean that i shouldn't draw more then 2.08A from it?
do i need to implement some additional current limiting circuit to ensure the LM338 does not draw more then 2A and damage the transformer? i was messing around with it today using it to power an amplifier and it was putting out 5A to 7A.
according to the datasheet, LM338 is rated for 5A and limits current at 12A. if my transformer is rated 50VA at 24V then doesn't that mean that i shouldn't draw more then 2.08A from it?
do i need to implement some additional current limiting circuit to ensure the LM338 does not draw more then 2A and damage the transformer? i was messing around with it today using it to power an amplifier and it was putting out 5A to 7A.