Parallel with different chips! - diyAudio
Go Back   Home > Forums > Amplifiers > Chip Amps

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
Reply
 
Thread Tools Search this Thread
Old 9th October 2007, 08:59 AM   #1
diyAudio Member
 
Join Date: Jun 2005
Location: KL
Default Parallel with different chips!

I would like to ask whether I can parallel LM3886 with TDA2050 together, Thank you.
  Reply With Quote
Old 9th October 2007, 11:36 PM   #2
diyAudio Member
 
Join Date: Apr 2005
Location: In the Wild, Wild West
I didn't look at the TDA datasheet but if both chips are the same type of output then as long as the gains are matched and use ballast resistors then it should work just like using two LM3886 chips.

-SL
  Reply With Quote
Old 10th October 2007, 11:01 AM   #3
diyAudio Member
 
tangmonster's Avatar
 
Join Date: Jul 2007
Location: Cape Town
I might be wrong but

building a car with two of the same type of engines connected to one gearbox seems like a possible solution to get more torque.

But building a car with two different sized engines connected to one gearbox seems to be just not a good idea. It will probably work, you may have a bit more power , but a single engined car will be so much lighter en simpler and easier to service...

just my feeling on this idea.

  Reply With Quote
Old 10th October 2007, 11:22 AM   #4
Did it Himself
diyAudio Member
 
richie00boy's Avatar
 
Join Date: Nov 2003
Location: Gloucestershire, England, UK
It won't work reliably, the LM chip is more powerful than the TDA and their frequency responses will be different which could cause problems.
__________________
www.readresearch.co.uk my website for UK diy audio people - designs, PCBs, kits and more.
  Reply With Quote
Old 10th October 2007, 09:52 PM   #5
diyAudio Member
 
Join Date: Apr 2005
Location: In the Wild, Wild West
OK, so I looked at the datasheets and it is not worth the trouble. The TDA2050 is not powerful enough. The TDA2050 can only be run as high as a +/-25 supply while the LM3886 can run up to +/-42V. Even if you parallel into 4 ohms so that each IC sees 8 ohms you still are limited to +/-25V maximum. This means no more power than the LM3886 by itself driving that same 4 ohms, and less because the LM3886 is rated at +/-28V for a 4 ohm load. Now if you're looking to drive <4 ohms then there might be some merit to it. Overall, get better matched ICs to do some parallel design.

-SL
  Reply With Quote
Old 11th October 2007, 03:12 AM   #6
diyAudio Member
 
Join Date: Jun 2005
Location: KL
Thanks a lot guys.
  Reply With Quote
Old 11th October 2007, 04:46 AM   #7
diyAudio Member
 
I_Forgot's Avatar
 
Join Date: Jan 2005
Location: Phoenix, Az.
Hey, I like this idea. This is thinking "out of the box"!

One chip has a nice beefy bass with an unassuming upper register and the other contributes overtones of nutmeg and dark chocolate. You'll never find that combination in a single chip design!

I_F
  Reply With Quote
Old 11th October 2007, 05:15 AM   #8
diyAudio Member
 
Join Date: Apr 2003
Location: Portland,Oregon
Blog Entries: 4
Send a message via AIM to DigitalJunkie
Quote:
Originally posted by I_Forgot
Hey, I like this idea. This is thinking "out of the box"!

One chip has a nice beefy bass with an unassuming upper register and the other contributes overtones of nutmeg and dark chocolate. You'll never find that combination in a single chip design!

I_F

Could be good for a 2-way/bi-amped setup.
  Reply With Quote
Old 11th October 2007, 05:34 PM   #9
diyAudio Member
 
Speedskater's Avatar
 
Join Date: Sep 2002
Location: Lakewood, Ohio
No, if the two chips don't have almost identical frequency and gain response they will fight each other every inch of the way. Each will try to force the other to whatever voltage that it thinks is correct at that instant.
__________________
Kevin
  Reply With Quote
Old 11th October 2007, 10:27 PM   #10
diyAudio Member
 
I_Forgot's Avatar
 
Join Date: Jan 2005
Location: Phoenix, Az.
Quote:
Originally posted by Kevin Graf
No, if the two chips don't have almost identical frequency and gain response they will fight each other every inch of the way. Each will try to force the other to whatever voltage that it thinks is correct at that instant.
That struggle, like an artist struggling to master his medium, is the source of the flavor of the mixed parallel chip amplifier!

I_F
  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
gainclone chips in Parallel steven344 Chip Amps 2 21st November 2005 05:52 PM
Elegant way to feed parallel data-input DAC chips ? Bernhard Digital Source 27 18th April 2005 10:28 PM
Active Feedback on Parallel Chips Stocker Chip Amps 8 4th May 2004 10:40 PM
can I parallel 7812 Chips PaulHilgeman Parts 16 6th May 2003 10:05 PM
Balanced or parallel DAC chips A 8 Digital Source 32 18th March 2003 03:22 PM


New To Site? Need Help?

All times are GMT. The time now is 12:06 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