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Class D Switching Power Amplifiers and Power D/A conversion

TDA8950J  hiss noise
TDA8950J  hiss noise
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Old 21st January 2013, 04:18 PM   #1
ktnaveenkspet is offline ktnaveenkspet
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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
nigelwright7557 is offline nigelwright7557  United Kingdom
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Location: Carlisle, England
What have you got as an output filter ?
PCBCAD51 pcb design software. 2018 version out now with lower prices >> http://www.murtonpikesystems.co.uk
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Old 22nd January 2013, 01:56 PM   #3
ktnaveenkspet is offline ktnaveenkspet
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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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Old 8th May 2013, 01:40 AM   #4
razEG is offline razEG
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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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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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