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Jason 10th December 2013 10:36 AM

Super Regulator
 
This thread is for discussions about the Power Supply Super Regulator which is now available for pre-order.

You can read Jan's introduction to the Super Regulator in his blog, then check out the Super Regulator Article over at Linear Audio and discuss it in this thread right here.

Change History
  • V2 - Initial public release

Information

AndrewT 10th December 2013 10:48 AM

Why are Q2 and Q4 specified with different gain, A or B?

Can another device be used for LM329?

jan.didden 10th December 2013 12:13 PM

Andrew,

Both the A and B versions can be used with no impact on performance. If you have to buy them, buy the A version because you'll probably use some of them in other projects, and why not go for the highest beta.

As you probably read in the article you need to use another ref anyway for output voltages below 6.9V. The LM-4040 series offers all kinds of voltages and are a good choice. But undoubtedly there are others.
The spec to look for is low noise, rather than accuracy. The output voltage accuracy really is almost of no consequence here.

Jan

AndrewT 10th December 2013 12:33 PM

Thank you.
I have read all the Walt Jung articles and your addendum many years ago.
Thanks for that as well.

I have some BC546/556C
Would the higher gain cause a stability problem?

jan.didden 10th December 2013 01:03 PM

I wouldn't expect that. BTW In my previous post I should have recommended to get either the B or the C version, not the A version of course.
Just checked, my own board has a B in both places.

Jan

buzzforb 10th December 2013 01:43 PM

By using different opamps, can the available voltage range be extended higher? Some possiblities were mentioned in the Linear Audio thread, I believe.

jan.didden 10th December 2013 02:10 PM

Quote:

Originally Posted by buzzforb (Post 3734237)
By using different opamps, can the available voltage range be extended higher? Some possiblities were mentioned in the Linear Audio thread, I believe.

The opamp is supplied from the output voltage so there's your limit as far as output voltage is concerned. I think max 44V (+/-22V) is the limit for available opamps, in that case you don't want to go higher than 40V or so.

Apart from the obvious voltage rating for the capacitors, you should change D2/D7 to get the opamp output back to half the Vout for best performance, as well as change the D5/D10 series resistor to get the current through them back to about 1.5 to 2 mA.

Jan

buzzforb 10th December 2013 02:53 PM

Thank you. Looking for about 35-36V

jan.didden 10th December 2013 03:50 PM

Quote:

Originally Posted by buzzforb (Post 3734294)
Thank you. Looking for about 35-36V

Yes that should be no problem, but you need a higher voltage opamp, a regular one with max +/-18V supply is cutting it a bit close for my taste.
IIRC the NE5534 can handle 44V total and would work well here.

Edit: the NE5534 is spec'd for 40V total supply max, should be OK.

Jan

pooge 10th December 2013 03:54 PM

So is +/-24v out of the question?


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