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TDA2030A amplifier
TDA2030A amplifier
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Old 12th April 2019, 03:29 PM   #1
Anirvan is offline Anirvan
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Question TDA2030A amplifier

I always love to make audio amps as I love music. So I tried making a TDA2030A amplifier and had made one according to the data sheet. I powered it using a 12-0-12 volts 1 A transformer and it worked fine. But the next day when I assembled the whole thing in a metal cabinet and powered it up again, the amp started making excessive humming and noise and finally the Chip burst with a loud pop!!

I don't know what went wrong in one day or someone cursed my amp or whatever happened.

Anyone please tell me why this happened? ?
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Old 12th April 2019, 03:40 PM   #2
Osvaldo de Banfield is offline Osvaldo de Banfield  Argentina
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Are you using split supply or single? If you grounded the tab, with split power, then you made a short circuit across negative bus. It's ok if the negative is grounded.
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Old 13th April 2019, 06:52 AM   #3
Anirvan is offline Anirvan
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Quote:
Originally Posted by Osvaldo de Banfield View Post
Are you using split supply or single? If you grounded the tab, with split power, then you made a short circuit across negative bus. It's ok if the negative is grounded.
I'm using +\- 12 v transformer
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Old 13th April 2019, 11:48 AM   #4
Kshishtoff is offline Kshishtoff
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Anirvan, you should to have installed a dielectric pad between your chip and heatsink.
But probably I'm wrong. Photos of your amp can tell us the truth.
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Old 15th April 2019, 12:13 PM   #5
Osvaldo de Banfield is offline Osvaldo de Banfield  Argentina
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12VDC or AC at the rectifier input?. If you isolated the tab from the heat sink or the HS is in no contact with another metallic part, then there is no problem.

Perhaps a bad decoupling or wiring made it braking into oscillations.
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