Super Regulator

[jan.didden]

Walt has warned against low ESR capacitors

Only as output capacitor. For the other's it's really not critical.

Jan

 

[BartDev]

Hmmm I think Nichicon FineGold isn't low ESR, KZ was advised there, KZ have lower ESR than FineGold, I asked about capacity rather than ESR 🙂

 

[BartDev]

Hey, does led have any means in this circuit? I have super bright LEDs, but I can buy others if needed

 

[jan.didden]

The voltager across the LED sets the bias current, you can paint them black if you want ...
Maybe you really should read the article.

Jan

 

[BartDev]

This one? https://www.diyaudio.com/archive/blogs/comments/comment3647.html link inside this article named "Read the full article with schematics, board layout, stuffing guides etcetera here." creates error 404

 

[mhenschel]

see the super regulator page in power supplies in the diyaudio store
lots of resources... and boards to buy!

 

[BartDev]

I have one board and all parts, but there isn't any info about led voltage in BOM, and link to the description in the article doesn't work, as i show 😉

 

[mhenschel]

look in the store

 

[jan.didden]

https://diyaudiostore.com/collections/circuit-boards/products/super-regulator
https://linearaudio.net/superregs

Jan

 

[BartDev]

Jan, okey, but this is link to shop, and detailed description of circuit? I found pdf files "regs for high perf audio", did you think about it? If not, send me link to detailed description please

 

[jan.didden]

Everything is in the last link. That's the link where you got the error.
The articles contain further links.

Jan

 

[BartDev]

Ok, I found it under "2.3 ver", it would be linked in shop

 

[Sarunas]

I just modeled GLED431 with CCS for negative part of Jung/Didden Superregulator. I would be very happy if someone can comment and point to any mistakes. Current through R6 (390R) 5mA.
View attachment 1245155

To quote personal messages probably not very nice but want to share finished and working project ant to thank you all for helpful advices. My reference voltages from GLED431 slightly off, at the positive rail 6.7V and at the negative 6.85V and leds on negative rail are a little bit lighter. But I put trimmers to have a possibility to adjust output voltage and I can set exactly 15V. Should I worry about these reference voltages?

 

[SrAzul]

Hello. I just completed a +/- 15V super regulator using the board from the diy store and all parts from Mouser. I'm giving it +/-20V from my bench supply. Both regulators seem to work fine. However, I'm getting oscillations on both outputs. I'm not sure where to start troubleshooting. Can someone point me in the right direction please? Scope shots are of both outputs across a 100 0hm load.

 

[Sarunas]

Too low ESR for output capacitor?

 

[mhenschel]

maybe up the input voltage a couple of volts?

 

[SrAzul]

Thanks, I'll look into the ESR rating of my output cap. Is it that critical? As far as I can tell the recommended HFQ caps are obsolete. I currently have an FA series cap installed with an ESR of 0.19.

 

[Sarunas]

I think main was about 0.18 and it works.

 

[Awh]

Check the value of C11/12, should be 100pF. I'm sure I have seen oscillation due to this being either 10pF or 10nf by mistake somewhere back in this thread.

Andy

 

[SrAzul]

Looks like I have a 100nf cap installed for c11/c12. I will have to source some 100pf caps and report back. Thanks Andy!