The simplistic Salas low voltage shunt regulator - Page 472 - diyAudio
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Old 2nd January 2012, 11:35 PM   #4711
Salas is offline Salas  Greece
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Ken:

Let me see...yes. That is how it sims with 300mA CCS, 34Vin, 24Vout, C1 0.47uF as I had it last saved on file. They look alike, don't they?
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Old 2nd January 2012, 11:43 PM   #4712
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Solid... dotted ?
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Old 2nd January 2012, 11:43 PM   #4713
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Quote:
Originally Posted by RCruz View Post
What are the solid lines ?

What are the dotted lines ?
They are output impedance traces versus frequency. Dotted is their phase. You can read the one I posted before in dB, also in Ohm as such (~7mOhm flat portion):
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Old 2nd January 2012, 11:48 PM   #4714
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Old 3rd January 2012, 12:08 AM   #4715
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Quote:
Originally Posted by Salas View Post
They are output impedance traces versus frequency. Dotted is their phase. You can read the one I posted before in dB, also in Ohm as such (~7mOhm flat portion):
Salas, I know I've probably asked this before, so, forgive my poor memory... How do you get the impedance analysis? Which simulation CDM are you using? I understand how to make the formula in the graph output...
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Old 3rd January 2012, 12:16 AM   #4716
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Do your Vout slash 1A, then run again, then click to the left of analysis window on the vertical axis numbers, will give you linear option also. There you enter Ohm margins.
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Old 3rd January 2012, 09:04 AM   #4717
RCruz is offline RCruz  Switzerland
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A correction is in order. My previous info was based on a friend´s measurements that is using my build.

I remade the measurements in real time and to reach 28Vout I need 10 minutes but with a different behaviour:
1st minute, Vout climbs steadily from 0 to 29Vout
9 minutes, Vout decreases slowly from 29 to 28 Vout
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Old 3rd January 2012, 11:55 AM   #4718
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It charging the 2000uF with 4mA then, and the transistors TC behavior. Must have no special start up issue.
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Old 3rd January 2012, 02:44 PM   #4719
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No issues
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Old 3rd January 2012, 02:47 PM   #4720
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Quote:
Originally Posted by merlin el mago View Post
Happy New Year Ricardo, just curious all Salas shunt regs sounds good with more current

P.S. Pics will welcome.
Happy New year for you too Merlin.

Yes... a little more current does wonders sometimes
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