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Old 21st January 2013, 04:18 PM   #1
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Join Date: Jul 2012
Post TDA8950J hiss noise

Dear friends:

I had done an amplifier using TDA8950 ,+/-16vDc rail to rail power supply . Soldered on PCB using the application circuit provided on datasheet.

But the problem is at the output the resistor 10ohm tesitor heats up ,and the sound on the woofer has more hissing ,then the music.

Tell me what may be the problem.

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Old 21st January 2013, 11:15 PM   #2
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Join Date: Apr 2008
Location: Carlisle, England
What have you got as an output filter ?
Murton-Pike Systems PCBCAD51 pcb design software.
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Old 22nd January 2013, 01:56 PM   #3
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Earlier I had done this circuit for amplifier ,it was working fine. Now again I have done one more PCB[soldered in Gerenal purpose PCB] using this TDA8950 .

The circuit as in Attachment .
Please, see.
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File Type: jpg tda.JPG (73.6 KB, 159 views)
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Old 8th May 2013, 01:40 AM   #4
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Do you still need help with your problem?
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Old 8th May 2013, 03:14 AM   #5
DUG is offline DUG  Canada
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Join Date: Jan 2003
Location: mississauga ontario canada
one of the CSN caps probably shorted.

my guess

Doug We are all learning...we can all help
"You can't stop the signal, Mal. Everything goes somewhere..."
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