Power Supply for Amp. - diyAudio
Go Back   Home > Forums > Design & Build > Parts

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
Reply
 
Thread Tools Search this Thread
Old 6th February 2007, 02:42 AM   #1
diyAudio Member
 
Join Date: Feb 2007
Location: Argentina
Default Power Supply for Amp.

Ok i've just built an amp using TDA2030 IC, i used the single power supply version of the circuit tanken off the component Datasheet. Now, i've tested it with a computer power supply and it works ok, but i'd like to build a power supply for it but if i use a common one, i get a horrible sound, so i take it it has to be very very filtered if not regulated (if i'm not wrong, it has to have very small ripple...)any schematics for such thing? cause i thought using LM7812 to regulate and capacitors to filter but i'm not sure if it'll be enough.
Thanks again everyone!
  Reply With Quote
Old 7th February 2007, 07:27 PM   #2
AndrewT is online now AndrewT  Scotland
diyAudio Member
 
Join Date: Jul 2004
Location: Scottish Borders
Hi,
most decent chipamps have adequate Power Supply Rejection Ratio (PSRR) to hide the small ripple at quiescent conditions and to hide the big ripple when delivering significant output current.

A conventional unregulated PSU consisting of just a transformer + rectifier + smoothing cap is usually enough for a single supply ?Vdc to 0Vdc.

Be careful to ensure the maximum voltage from your PSU is less than the absolute maximum Chipamp voltage requirement.
__________________
regards Andrew T.
  Reply With Quote
Old 7th February 2007, 09:17 PM   #3
ouxly40 is offline ouxly40  United States
diyAudio Member
 
ouxly40's Avatar
 
Join Date: Feb 2007
Location: sitting on CPU fan
Default Regulation

The 78xx series regulators are easy, stable and reliable. They however, are not so good at rapidly changing current draw. You want to use a series pass regulator. You may also try a much larger filter cap on the one you have.
  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
Split Voltage Switching Power Supply for Power Amp vectorplane Swap Meet 2 23rd April 2011 11:48 PM
LTspice tool for power amp power supply component evaluation andy_c Software Tools 2 23rd August 2009 05:10 PM
Can i use a computer power supply to power audio amplifiers? destroyer X Solid State 91 25th September 2006 04:36 AM
selling high current power supply for power amps. ericpeters Swap Meet 0 14th January 2005 02:21 PM
heater supply (xformer specs are 6.3V 2.5A) as supply for a power LED? jarthel Tubes / Valves 10 21st July 2003 01:30 PM


New To Site? Need Help?

All times are GMT. The time now is 05:52 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