Super Regs - Page 3 - diyAudio
Go Back   Home > Forums > Amplifiers > Power Supplies

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 20th September 2009, 02:12 PM   #21
iko is offline iko  Canada
diyAudio Moderator
 
iko's Avatar
 
Join Date: May 2008
Location: Toronto
Quote:
Originally Posted by jackinnj View Post
Almost a year later, here's the version I am going to work with -- mostly surface mount, save the rectifier diodes and electrolytic caps -- I have not had a lot of success mounting smt electrolytics. The reference for each is the LM4040:

Click the image to open in full size.
Looks very nice Jack, I'm looking forward to some results from you. I've looked into using a high performance opamp buffer in a different regulator as well, but then dropped the idea. Is the lm4040 a reasonably low noise reference in reality? I have no experience with it.
  Reply With Quote
Old 20th September 2009, 06:09 PM   #22
diyAudio Member
 
jackinnj's Avatar
 
Join Date: Apr 2002
Location: Llanddewi Brefi, NJ
Quote:
Originally Posted by ikoflexer View Post
Is the lm4040 a reasonably low noise reference in reality? I have no experience with it.
The LM329 is quieter, but not available in SOT-23
  Reply With Quote
Old 20th September 2009, 07:08 PM   #23
Electrons are yellow and more is better!
diyAudio Member
 
peranders's Avatar
 
Join Date: Apr 2002
Location: Göteborg, Sweden
Blog Entries: 4
LM329 is one of the best and it's a mystery why you can't find any similar in SMD package.
__________________
/Per-Anders (my first name) or P-A as my friends call me
Super Regulator SSR03 Group buy
  Reply With Quote
Old 20th September 2009, 07:27 PM   #24
diyAudio Member
 
jackinnj's Avatar
 
Join Date: Apr 2002
Location: Llanddewi Brefi, NJ
I wanted to use what I had on hand -- and the one reference I had in SOT-23 was the LM4040 which, by coincidence, Nat Semi used as well. I also used through-hole rectifiers!

Will see how we do when the stuff comes back. I have stock Super Regulator boards from Old Colony to compare noise, impedance etc.
  Reply With Quote
Old 25th September 2009, 09:47 AM   #25
Electrons are yellow and more is better!
diyAudio Member
 
peranders's Avatar
 
Join Date: Apr 2002
Location: Göteborg, Sweden
Blog Entries: 4
Quote:
Originally Posted by janneman View Post
You read my mind or what ?

I just read a comment by Scott Wurcer, the designer of the 797, here:

http://www.diyaudio.com/forums/showt...64#post1509264

Wish I had know that at the time...

Jan Didden
It would be interesting to see what this little cap could do practically. It was a long time since I tested AD797.
__________________
/Per-Anders (my first name) or P-A as my friends call me
Super Regulator SSR03 Group buy
  Reply With Quote
Old 30th September 2009, 01:52 AM   #26
diyAudio Member
 
jackinnj's Avatar
 
Join Date: Apr 2002
Location: Llanddewi Brefi, NJ
Well, the first try ran over a cliff and died -- I got one version to work right for a few seconds -- then it oscillated itself to death.
  Reply With Quote
Old 30th September 2009, 02:06 AM   #27
iko is offline iko  Canada
diyAudio Moderator
 
iko's Avatar
 
Join Date: May 2008
Location: Toronto
Jack, is this your new reg? I meant to ask how it was coming along.
  Reply With Quote
Old 30th September 2009, 12:28 PM   #28
diyAudio Member
 
jackinnj's Avatar
 
Join Date: Apr 2002
Location: Llanddewi Brefi, NJ
Quote:
Originally Posted by ikoflexer View Post
Jack, is this your new reg? I meant to ask how it was coming along.
It's the design from the LME49600 datasheet, nothing original there. The open loop bandwidth of the LMe49600 is 110MHz (180MHz if the bandwidth pin is brought to Vee).

I strongly suspect that it is a layout issue, since all of the connections are correct per the schematic. I did have a layout issue with the SOT-23 LM4040 which I fixed.
  Reply With Quote
Old 30th September 2009, 02:23 PM   #29
iko is offline iko  Canada
diyAudio Moderator
 
iko's Avatar
 
Join Date: May 2008
Location: Toronto
Did you use an output cap at all? There's also Jimmie D. Felps' trick with the small resistor in series with the output, for stopping crazy opamps oscillation (applies only to driving capacitive loads, but worth trying because it's so easy).
  Reply With Quote
Old 30th September 2009, 02:31 PM   #30
Electrons are yellow and more is better!
diyAudio Member
 
peranders's Avatar
 
Join Date: Apr 2002
Location: Göteborg, Sweden
Blog Entries: 4
Jack, when I see your grounding scheme, how did you think? You have made a dual PS with two separate ground connections? Grounding is critical you know.
__________________
/Per-Anders (my first name) or P-A as my friends call me
Super Regulator SSR03 Group buy
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Simple Super Shunt and Simple Super Shunt w/CCS vs. JSR03/05 (and other series regs) hollowman Power Supplies 45 5th July 2013 10:50 PM
Why are they building -15v regs RCruz Power Supplies 16 14th December 2008 10:14 PM
Jung Super Regs & LEDs underwurlde Power Supplies 9 14th May 2008 02:24 PM
Audiocom super regs t. Digital Source 10 20th April 2007 04:16 AM


New To Site? Need Help?

All times are GMT. The time now is 11:54 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright ©1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2