Tda7294 again .!! - diyAudio
Go Back   Home > Forums > Amplifiers > Chip Amps
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Chip Amps Amplifiers based on integrated circuits

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 14th June 2010, 09:12 PM   #1
diyAudio Member
Join Date: Nov 2009
Question Tda7294 again .!!

I intend to build this circuit for my stereo amp. each channel will consist of 2 tda7294 in bridge mode all i need is pretty pcb for this circuit-or i`ll have to build it on general purpose board..lool- & any one have any comment or modification about the circuit i am glad to hear it...
I will use 24-0-24 10 amp. transformer
2 * 8 ohm speakers
and this circuit for tone control
  Reply With Quote
Old 15th June 2010, 10:19 AM   #2
diyAudio Member
Join Date: Nov 2009
32 views and 0 reply ...!!??
  Reply With Quote
Old 28th June 2010, 06:43 AM   #3
adil is offline adil  Pakistan
diyAudio Member
Join Date: Jun 2010
good amp
  Reply With Quote
Old 28th June 2010, 12:09 PM   #4
sangram is offline sangram  India
diyAudio Member
Join Date: Sep 2002
Location: India
24 Volt transformers will result in rails of about 33-35V depending on mains voltage. You risk frying the chips with that voltage and that load. For 25V rails I would use 18 or 19V transformer.

Using a single resistor to bridge the chips will work, but I don't know that it is ideal in terms of performance. It might be worthwhile to explore a dedicated balanced line driver chip or use the second amplifier in inverting mode with a few suitable modifications in the gain resistors.

Good Luck.
  Reply With Quote
Old 28th June 2010, 12:50 PM   #5
riktw is offline riktw  Netherlands
diyAudio Member
Join Date: Sep 2007
use a 18V transformer, better for the chip :P
and design a neat PCB for it, a good amp deserves it imho
but TDA7294 amplifiers are very good, i personally like them more then the normal lm3886.
but for power supply, a good 2 * 18V transformer, 225VA per channel, and 20.000uF per channel for capasitors.
now build it and be amazed
  Reply With Quote
Old 28th June 2010, 07:18 PM   #6
diyAudio Member
Join Date: Nov 2009
i have successfully built it and i will upload photos as soon as possible
  Reply With Quote
Old 31st January 2011, 01:06 PM   #7
Hosam is offline Hosam  Syria
diyAudio Member
Join Date: Jan 2011
Location: Syria - Canada
I just have question about the power supply, does 2x22v transformer will effect the chip as sangram mention above?
I want to build two PCB one single TDA and the other one is bridge 2xTDA. if I want to use power supply for both is it good to keep each one with own power supply or its better to use power supply for both "bridge and single TDA's"?
  Reply With Quote
Old 2nd February 2011, 09:10 PM   #8
nikko is offline nikko  Bosnia and Herzegovina
diyAudio Member
Join Date: Sep 2006
Location: Sarajevo
View from the APEX you have finished the project.
TDA7294 Stereo/Bridge with PSU

Last edited by nikko; 2nd February 2011 at 09:14 PM.
  Reply With Quote
Old 2nd February 2011, 10:07 PM   #9
diyAudio Member
ianpengelly's Avatar
Join Date: Oct 2006
According to the datasheet in the bridge configuration +/- 35V rails is more than acceptable and offers upto 170W output. The max permissable is +/- 40V, so there is no worry of frying this chip with the transformer suggested. What did you use in the end PROFESSOUR2003?

Are you pleased with the results?
  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
Tda7294 e_fortier Chip Amps 2 27th November 2008 01:33 PM
TDA7294. . . help! ;) danielwritesbac Chip Amps 3 19th April 2008 06:58 AM
Tda7294 Angel Puerto Chip Amps 6 21st August 2003 02:08 PM

New To Site? Need Help?

All times are GMT. The time now is 08:17 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