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Chip Amps Amplifiers based on integrated circuits

Chip-amps suited as power stage in a composite amplifier, LM1875/TDA2050 excluded.
Chip-amps suited as power stage in a composite amplifier, LM1875/TDA2050 excluded.
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Old Today, 02:39 PM   #91
Turbowatch2 is offline Turbowatch2  Germany
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Join Date: Aug 2013
Location: Northern germany
@chermann

Chris, you mentioned that the board does something strange.

Before my generator died, I saw something similar to page 9 figure 6 here:

http://www.ti.com/lit/ds/symlink/lm3886.pdf

So your what you call "strange" may be just the advanced protection kicking in.

So it might not be a fault, but a feature! So in my logic, any measure to "correct" this clipping behavior will be useless.
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Old Today, 03:58 PM   #92
FauxFrench is offline FauxFrench  France
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Join Date: Dec 2017
Location: The mountains, calm and quiet.
Quote:
Originally Posted by Turbowatch2 View Post
@chermann
Chris, you mentioned that the board does something strange.
Before my generator died, I saw something similar to page 9 figure 6 here:
http://www.ti.com/lit/ds/symlink/lm3886.pdf
So your what you call "strange" may be just the advanced protection kicking in.
So it might not be a fault, but a feature! So in my logic, any measure to "correct" this clipping behavior will be useless.

The strange phenomenom is probably the SPiKe interference in figure 5.
I had it also and as it is intended, Chris can't "iron it out".
Good to see a cheap board that works quite well and can be used for teaching of young DIYers and experiments for experienced DIYers.
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Old Today, 04:57 PM   #93
chermann is online now chermann  Austria
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Join Date: Jan 2017
Location: Vienna
Hi Turbo
Hi FF

as you look back to my pic (pic 6 at post 87) where i wrote its strange its just 16,1V rms into 8R = 2Amps ...and then i should get SpiKE???? no .....its near the max voltage swing because of the supply is +/- 25V. figure 15

Last edited by chermann; Today at 05:00 PM.
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