JLH class a with a SMPS?? Possible? - diyAudio
Go Back   Home > Forums > Amplifiers > Solid State
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Solid State Talk all about solid state amplification.

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 26th March 2005, 10:06 PM   #1
JZatopa is offline JZatopa  United States
diyAudio Member
Join Date: May 2003
Location: Chicago
Default JLH class a with a SMPS?? Possible?

I'm just curious if it would be possible to build an amp like this with a SMPS so it could run off of 12-14V?
  Reply With Quote
Old 27th March 2005, 04:26 AM   #2
diyAudio Member
weinstro's Avatar
Join Date: May 2003
Location: N. Cal
Sure, why not?

If anything, the SMPS should work better under this condition since the load seen by the PS will be constant.

I like the ultra low noise chips available from Linear Technology, e.g., LT1680, LT1533, etc. See http://www.linear-tech.com/index.jsp. Their app notes are good, and a recommended read. They can be run open loop or closed loop.

Specific problems you'll have to address are magnetics design, radiated noise, and heat dissipation. Pick a switching frequency well above audio range to avoid mechanical and electrical noise in the audio band.

If you intend to run this in an automobile, you'll have to pay more attention to heat management, since space is a premium. Also, you'll need to widen the operating voltages to 8-45 Vdc. Your design should be able to at least survive this, plus maybe reverse polarity.


  Reply With Quote
Old 27th March 2005, 04:47 PM   #3
diyAudio Member
weinstro's Avatar
Join Date: May 2003
Location: N. Cal
When you're ready to tackle the magnetics portion of your power supply, I'd recommend checking out the website of Magnetics, Inc.


Very good documentation available.


  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
SMPS for class D module NewTesla Class D 40 16th May 2010 07:38 PM
Amp9 with SMPS (my first class-d) sharpi31 Class D 15 25th April 2008 03:46 AM
SMPS vs. Class-D. Dag Class D 17 2nd March 2007 05:23 PM
A cheap 12v SMPS for class D Foxx510 Class D 0 22nd December 2006 07:55 AM
help with class D amp and SMPS Evan Shultz Class D 9 23rd February 2005 12:36 AM

New To Site? Need Help?

All times are GMT. The time now is 11:52 PM.

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