This PS should work as intended, right? - diyAudio
Go Back   Home > Forums > Design & Build > Parts
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Parts Where to get, and how to make the best bits. PCB's, caps, transformers, etc.

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
Thread Tools Search this Thread
Old 10th January 2006, 04:30 AM   #1
cetoole is offline cetoole  United States
diyAudio Member
Join Date: Mar 2005
Location: Maryland, USA
Default This PS should work as intended, right?

I am building a balanced amplifier that takes a single voltage input (onboard railsplitter and buffered vgnd), so was planning to use a slight variation on Carlos Filipe's Snubbed LM338 design, but with an onboard buffered railsplitter to provide the +/-18v needed by the DRV134 BLDs I have (digi01 boards). I am going to be using the 250VA 30v+30v Avel toroidal transformer from Parts Express, with the secondaries paralleled, which I will then rectify, and have 2 regulators sitting on that, the snubbed LM338, and a basic LM317 as shown in the datasheet to bring the rectified dc voltage (should be ~42v-diode losses, so about 40.5v or so, right?) down to exactly 36v, and then split that with a buffered TLE2426 for the BLDs, while the main amps uses the output of the LM338.

For the most part, I am pretty confident that this will work, but the one thing I am unsure of is whether the virtual ground will be stable, or would it require a seperate transformer? It seems like it should work to me, but I havnt done anything like this ever before, and cant find reference to something like this either. The voltage from the LM317 will be a fixed 36vdc, while the output of the LM338 will be usually 36vdc, but I will probably have it adjustable via trim pot instead of using fixed values.

I realize that the above was a bit garbled, but hopefully the schematic and board layout is enough for someone to tell if it will work to give out 36v and +/-18v.

Click the image to open in full size.

Click the image to open in full size.
  Reply With Quote


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
Will this balanced PSU work as intended? Will Solid State 4 24th February 2009 08:41 PM
VXI - how does it work ? Bernhard Parts 0 16th December 2008 10:33 AM
Would this work ? LesPaulStandard Instruments and Amps 3 4th May 2006 02:14 AM

New To Site? Need Help?

All times are GMT. The time now is 01:16 AM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2