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Wiring Amplifiers PSU
Wiring Amplifiers PSU
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Old 2nd April 2009, 03:42 AM   #1
Stinger is offline Stinger  Iran
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Question Wiring Amplifiers PSU

Hi guys,
I've build a speaker for my notebook using three TDA2030's. With one amp connected to the PSU the sound quality is very good, but the quality drops as I connect other two amps to the PSU.
It gets hum...noise.
Could you plaese guide me how to wire multiple TDA2030 amp boards to a single power supply?

Thank you in advance,
Stinger
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Old 2nd April 2009, 11:48 AM   #2
Rainwulf is offline Rainwulf  Australia
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What current capacity is your power supply?
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Old 2nd April 2009, 01:01 PM   #3
Stinger is offline Stinger  Iran
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Quote:
Originally posted by Rainwulf
What current capacity is your power supply?
3A 12V-0-12V
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Old 2nd April 2009, 01:05 PM   #4
Rainwulf is offline Rainwulf  Australia
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Sounds like something isnt wired correctly.

Do you have a circuit diagram?
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Old 2nd April 2009, 06:03 PM   #5
drummer_Dave is offline drummer_Dave  Canada
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do the other two amps work if you just connect them individually?

Dave
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Old 2nd April 2009, 06:31 PM   #6
Stinger is offline Stinger  Iran
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I don't have any at the moment. But I will draw one asap I can in a few days.

regards!
Strynger
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Old 3rd April 2009, 05:41 AM   #7
Stinger is offline Stinger  Iran
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Quote:
Originally posted by drummer_Dave
do the other two amps work if you just connect them individually?

Dave
Yes, Each amp is working with no problem, If it's connected individually.
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Old 3rd April 2009, 11:32 AM   #8
Stinger is offline Stinger  Iran
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Default Here's a digram of my wiring:

As you see each amp has two grounds. one is for signal-gnd and the other is for decoupler and bypass capacitors.

Where's the problem with my wiring?

I have another question about the diode pole;
Can they cause any problem?
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Old 3rd April 2009, 11:32 AM   #9
Stinger is offline Stinger  Iran
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Click the image to open in full size.
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Old 3rd April 2009, 11:41 AM   #10
Rainwulf is offline Rainwulf  Australia
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no picture there...
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