class A amp with switchmode psu??? - diyAudio
Go Back   Home > Forums > Amplifiers > Class D

Class D Switching Power Amplifiers and Power D/A conversion

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 17th June 2004, 06:17 AM   #1
diyAudio Member
 
Join Date: Apr 2004
Location: BC
Default class A amp with switchmode psu???

is it possible to have a class A amp, with a switchmode psu (if the output of the psu is put through a linear regulator to minimise ripple)...i was thinking of using the lm2575 type switching regulator...is it possible to get 60V out of this chip..ideas would be much appreciated..
  Reply With Quote
Old 17th June 2004, 07:31 AM   #2
diyAudio Member
 
Ouroboros's Avatar
 
Join Date: Dec 2003
Location: Nottingham UK
A 2575 (or the higher frequency 2595) won't go this high in voltage. There aren't many buck converters with built-in switching transistors that are designed for high-voltage operation.

With a competantly designed switcher you won't need a linear post-regulator but you will need decent filtering on the output.

As a class-A amp (by definition) draws a steady current from the PSU, do you really need a regulated supply?
  Reply With Quote
Old 17th June 2004, 10:52 AM   #3
diyAudio Member
 
bigparsnip's Avatar
 
Join Date: Apr 2003
Location: Cambridge
Default Re: class A amp with switchmode psu???

Quote:
Originally posted by demons_wing
is it possible to have a class A amp, with a switchmode psu (if the output of the psu is put through a linear regulator to minimise ripple
What would be the poin tof using a switchmode power supply (used mainly for their efficiency and PFC abilities) if you are then going to ruin the efficiency of the supply (or feed a class-a amp from it for that matter) by using a linear regulator after it.

Surely in this case it would be a lof simpler,safer and cheeper in the end yo simply go with the traditional power supply for your project?
  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
Switchmode on the WWW TroelsM Power Supplies 9 10th April 2009 10:08 AM
Switchmode Transformer nitrate Car Audio 60 10th November 2008 10:47 AM
Class AB car amp, switchmode power supply, what rails?? SkinnyBoy Solid State 4 8th December 2003 02:26 PM
Switchmode B+ PSU richwalters Pass Labs 0 26th September 2003 08:20 PM


New To Site? Need Help?

All times are GMT. The time now is 10:41 AM.


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