| Electronics > Beginners |
| Discrete Regulated power supply |
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| IanMacdonald:
As in other thread, problem with variable resistor P4 in -ve feedback line is that if it goes O/C even momentarily, your device under test gets BLAM! from max output voltage. Since this may be very short duration -a tiny bad spot on the track- you might not know why things are being blown. |
| JS:
--- Quote from: IanMacdonald on June 10, 2018, 08:02:26 am ---As in other thread, problem with variable resistor P4 in -ve feedback line is that if it goes O/C even momentarily, your device under test gets BLAM! from max output voltage. Since this may be very short duration -a tiny bad spot on the track- you might not know why things are being blown. --- End quote --- It's not supposed to be moved around a lot, just to fix the max value, so an internal trimmer, much less likely to fail. Also it could be replaced with a fixed resistor. The every day voltage adjustment should be done by moving P1. JS |
| HoracioDos:
Hello! I tried to model the circuit with component's original names and I changed a few things. I'm sure there are some mistakes, please be kind. Thanks! |
| techguru:
Thanks a lot. If any one has a current control circuit with discrete circuit,Do post here. If it explains the operation well and good. Thanks you all |
| HoracioDos:
This version has a TL431 and a pass transistor. I adapted the TL431 model from Eugene Dvoskin to match SCR symbol pins and I avoided to import an .asy file. I'm as dangerous as a thornbush brandished by a drunkard. I don't know if that part of the circuit is correct. R6,R10,R11 are not calculated. Output seems to be correct but perhaps it's just a coincidence. |
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