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Old 9th December 2003, 05:18 PM   #1
Vigier is offline Vigier  Netherlands
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Default Sulzer-Borbely SB-1 regulator

Hi,

I'm planning to build a few active crossover (4x low-pass, 3x high-pass, using 25 OPA627's).

The power supply I have in mind is the Sulzer-Borbely SB-1 regulator.

Design: http://www.hitechnetworks.net/bwaldr..._regulator.htm

Click the image to open in full size.

I planned to use a few 470µF/50V SXE capacitors instead of the 4700µF/35V capacitor's in the schematic, but in another thread they told me that was NOT a good idea.

Since I don't have any experience with this kind of power supplies (usually I just use some regulator's, decoupling etc), I would like to know what kind of capacitors I should use in this design to get the best performance. (and don't say I have to use black gate 4700µF capacitor's but just "normal" components please).

Can anyone help me with that?

And about the two transistors: 2N2905 and 2N1711, since they have BIG trouble loading the capacitors at the output, can anyone recommend me better ones? With the same performance but better current capabilities?

Thnx in advance!

Grtz, Joris
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Old 9th December 2003, 07:53 PM   #2
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Here`s a schematic you should take look at, the op-amps supply, voltage is taken from the regulated output, providing much better S/N. My simulation showed 30-35dB improvement, compared to standard regulators (as yours) and the 50Hz component was in the uV-area (with the ac voltage source).

Vout=D9*(1+R17/R3).

I found it somewhere on this forum, but I`ve lost the URL.


Try it out !
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Old 9th December 2003, 08:28 PM   #3
dimitri is offline dimitri  United States
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have you search diyaudio prior posting?

here is a long and informative thread:

Super Regulator, collecting the facts
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Old 9th December 2003, 10:30 PM   #4
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Sorry, was in a hurry, but that`s the one!

Thanks Dimitri
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Old 9th December 2003, 11:06 PM   #5
Vigier is offline Vigier  Netherlands
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Thanks a lot guys,

I've got some reading to do I think. I have seen the thread you mentioned for a few minutes when searching for information about the SB-1, but didn't take a GOOD look at it.
I better start reading now...

Grtz, Joris
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Old 10th November 2004, 07:55 AM   #6
mllum is offline mllum  Malaysia
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Default schematic needed

Gentlemen, the link to the website is no longer avilable. I have in my possession some pcb's that were based on the schematic and layout provided by the people who originally maintained the ESL information exchange.

Unfortunately, I dont have the schematic nor the parts list and I hope that perhaps one of you gentlemen retained or kept a copy. I would appreciate it if you could upload the schematic or send it to me by e-mail.

Many thanks in advance.

JD Goonting
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Old 10th November 2004, 08:30 AM   #7
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