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| Simple DIY Linear PSU |
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| panoss:
--- Quote from: xavier60 on March 07, 2020, 04:51:24 am ---The design on mike_mike's thread uses a BD244a. Check what the modeled current gain is. --- End quote --- I don't have the simulation file of mike_mike's design. I 'm expecting someone to send it to me. |
| xavier60:
--- Quote from: panoss on March 07, 2020, 07:48:57 am --- --- Quote from: xavier60 on March 07, 2020, 04:51:24 am ---The design on mike_mike's thread uses a BD244a. Check what the modeled current gain is. --- End quote --- I don't have the simulation file of mike_mike's design. I 'm expecting someone to send it to me. --- End quote --- You mainly need to find a driver transistor with reasonable gain. What did you use in the simulation of LM723 design? Keep in mind to regularly check Q1's Base voltage. The .pdf you posted seems corrupted. |
| panoss:
--- Quote from: xavier60 on March 07, 2020, 07:56:56 am --- --- Quote from: panoss on March 07, 2020, 07:48:57 am --- --- Quote from: xavier60 on March 07, 2020, 04:51:24 am ---The design on mike_mike's thread uses a BD244a. Check what the modeled current gain is. --- End quote --- I don't have the simulation file of mike_mike's design. I 'm expecting someone to send it to me. --- End quote --- You mainly need to find a driver transistor with reasonable gain. What did you use in the simulation of LM723 design? Keep in mind to regularly check Q1's Base voltage. The .pdf you posted seems corrupted. --- End quote --- Ok, I imported the D45H11 's model from a PSpice model for this transistor. (it 's doable) We do have an improvement but it's far from proper working: RL=10 Ohm, 1.42A, 14.2V RL=5 Ohm, 11.5V, 2.31A I reuploaded both .zip and .pdf files. |
| xavier60:
Did you note Q1's Base voltage? Can you obtain Q1's Collector current from the simulation? |
| panoss:
RL=10 Ohm, Q1 Vb= 7.12V Ic=0A RL=5 Ohm, Q1 Vb= 7.60V Ic=0A No current through Q1?? :-// |
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