Hi!
I'm using a LM317 voltage regulator. Instead of connecting two resistances, one between output and adjust and one between adjust and ground, I would prefer using a trimmer connected in this way:
In this way the trimmer acts in a ratiometric manner, so I prevent voltage drifts due to temperature effect.
But I think it could be a problem: when the wiper reaches the upper bound, the output and the adjust are shorted. So a big current flows in the pot and I think it could be a problem for it.
Are these considerations right? Or does the LM317 have any protections and the current can't exceed a limit?
(I found a similar post with a similar title but it doesn't answers may question)
Thanks!
I'm using a LM317 voltage regulator. Instead of connecting two resistances, one between output and adjust and one between adjust and ground, I would prefer using a trimmer connected in this way:
In this way the trimmer acts in a ratiometric manner, so I prevent voltage drifts due to temperature effect.
But I think it could be a problem: when the wiper reaches the upper bound, the output and the adjust are shorted. So a big current flows in the pot and I think it could be a problem for it.
Are these considerations right? Or does the LM317 have any protections and the current can't exceed a limit?
(I found a similar post with a similar title but it doesn't answers may question)
Thanks!