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Chip Amps Amplifiers based on integrated circuits

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Old 26th August 2011, 12:07 PM   #1
tadiam1 is offline tadiam1  Argentina
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Join Date: Dec 2009
Location: argentina
Default why?

Yesterday buy an tda2050 to replacement an lm1875 in my test table.
This (tda...) no work. ac tension sound in the speaker.
Why? fake tda?
any idea?
thanks
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Old 26th August 2011, 01:46 PM   #2
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Join Date: Jun 2011
From China?
Easily fake or not working components...
Replace with an other one, and it works just fine.

Have had many...
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Old 26th August 2011, 05:21 PM   #3
johnr66 is offline johnr66  United States
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Join Date: Mar 2009
Where did you get it? I bought some TDA2040 ICs off ebay and one came with a supply rail on the output. It was put into a known good circuit to test and was swapped with a good one to be sure it wasn't me screwing something up. I had fun blowing up the rest of the working ones by turning the signal to clipping and shorting the outputs. I don't think these fakes even have proper short circuit protection working. I now buy them through DigiKey and have been flawless.
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Old 26th August 2011, 05:56 PM   #4
tadiam1 is offline tadiam1  Argentina
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Join Date: Dec 2009
Location: argentina
Default re

I buy this in my local electronic store.
for the price 1,70 dollar maybe are fake.....
This no have the dot in the case and the words not are clear and white
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