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Old 23rd May 2002, 01:18 PM   #1
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Question Tda2050

this is a integrated class AB ~25-30W (as stated from the manufacturer) made by philips.
I thought id use it in a "lo-Fi / mid-Fi" system..like my computer...
Anybody buildt an amplifier with this circuit??
Are there any experience about this circuit??
any help would be appreciated!
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Old 23rd May 2002, 01:54 PM   #2
TG is offline TG  Ukraine
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Hello Mr. Triatic,

I've built an amp with 2050's couple of years ago.
For multimedia purpose mainly.
And was not so impressed - it sounds too "plastic"...
With 4 Ohm speakers it sounds just awful

I've tried different scematics/layouts, so I'm afrraid that it's 2050's fault, not mine.

I strongly recommend TDA7294 or 7293 for computer audio applications...

Good luck!!!
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Old 23rd May 2002, 03:09 PM   #3
Nisbeth is offline Nisbeth  Denmark
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Take a look at this project. That might be what youre after. I certainly think the LM3876 is a better chip than the TDA2050.

Good luck!

http://headwize.com/projects/showpro...rison2_prj.htm
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Old 23rd May 2002, 06:05 PM   #4
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TDA7294 is good for cheap amps.I have sub amp with bridged TDA7294,amp sounds hard on bass.
LM series and TDA are very similar.
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Old 30th May 2002, 05:22 AM   #5
FBJ is offline FBJ  United States
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I think the TDA2050 would sound pretty good with a high quailty opamp driving it especially for just computer speakers. I had heard a TDA2010 (10W) driven by a NE5534 many years ago and I remember the sound wasn't to bad driving some radio shack speakers.
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Old 30th May 2002, 09:29 AM   #6
JP is offline JP
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The TDA2050 is one of the chips you can use to build an amp "a la Gaincard". Take a look at this page:

http://www.geocities.com/rjm003.geo/...io/diy_gc.html


I built an amp with the TDA2050 a couple of years ago from a very simple schematic published at Hi-Fi World (you can find the same schematic at the sheet provided by the manufacturer of the TDA2050 -it is easy to find it in pdf format on the net-, and the Gaincard comes from this schematic even more simplified), and I found it an easy, fun, and reliable project. The performance is good, comparable with average commercial designs; don't expect miracles, anyway.

Good luck.

JP.
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Old 30th May 2002, 02:52 PM   #7
paulb is offline paulb  Canada
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Check out
www.sound.au.com
for some other circuits. He offers PCBs that use one of the LM3875 variants.
The circuit in the article could be improved with bigger caps.
And...a stepped attenuator for a chip amp ??
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Old 26th April 2004, 05:36 PM   #8
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I build a stereo amp with the tda2050 and i came to the conclusion that it is'nt that bad at all if you enlarge the input cap
to 4.7 uf and the ouput cap to 2200 uf the amp sounds warmer
and the buffer cap's should be large at least 10000 uf for stereo
the disortion is reduced for at least 10%
the gainclone theorie of using 1000 uf as buffer is the most stupid thing i ever heard
at high output levels as 20w de disortion is uge with 1000 uf
and with 10000 uf the disortion is almost 0

archer out
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Old 26th April 2004, 06:00 PM   #9
joensd is offline joensd  Germany
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Quote:
the disortion is reduced for at least 10%
at high output levels as 20w de disortion is uge with 1000 uf
and with 10000 uf the disortion is almost 0
Just curious, did you actually measure this?
Quote:
the gainclone theorie of using 1000 uf as buffer is the most stupid thing i ever heard
Well, you have to keep in mind that all these chips are of very different quality. Some of them have very high PSRR.
The TDA2050 for example has relatively low PSRR.
Still its unbelievable for me that these chips can properly operate with input ripples of several volts at high output current but that is of course not a very scientific statement.
I build LM3886 amplifier with 2*10000u and 2*1000u and cant hear a difference but thats me and my ears.
So youd have to measure and listen yourself.
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