The simplistic Salas low voltage shunt regulator - Page 472

Salas · 2nd January 2012, 10:35 PM

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?

RCruz · 2nd January 2012, 10:43 PM

Solid... dotted ?

Salas · 2nd January 2012, 10:43 PM

Quote:

Originally Posted by RCruz

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):

RCruz · 2nd January 2012, 10:48 PM

klewis · 2nd January 2012, 11:08 PM

Quote:

Originally Posted by Salas

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...
Ken

Salas · 2nd January 2012, 11:16 PM

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.

RCruz · 08:17 AM

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

Salas · 3rd January 2012, 10:55 AM

It charging the 2000uF with 4mA then, and the transistors TC behavior. Must have no special start up issue.

RCruz · 3rd January 2012, 01:44 PM

No issues

RCruz · 3rd January 2012, 01:47 PM

Quote:

Originally Posted by merlin el mago

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

2nd January 2012, 10:43 PM	#4712
RCruz diyAudio Member Join Date: Sep 2006 Location: Saxon Blog Entries: 1	Solid... dotted ? __________________ RC

2nd January 2012, 10:48 PM	#4714
RCruz diyAudio Member Join Date: Sep 2006 Location: Saxon Blog Entries: 1	__________________ RC

3rd January 2012, 08:04 AM	#4717
RCruz diyAudio Member Join Date: Sep 2006 Location: Saxon Blog Entries: 1	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 __________________ RC Last edited by RCruz; 3rd January 2012 at 08:17 AM.

3rd January 2012, 01:44 PM	#4719
RCruz diyAudio Member Join Date: Sep 2006 Location: Saxon Blog Entries: 1	No issues __________________ RC

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2nd January 2012, 11:16 PM	#4716
Salas diyAudio Chief Moderator Join Date: Oct 2002 Location: Athens-Greece	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.

3rd January 2012, 10:55 AM	#4718
Salas diyAudio Chief Moderator Join Date: Oct 2002 Location: Athens-Greece	It charging the 2000uF with 4mA then, and the transistors TC behavior. Must have no special start up issue.

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