TDA7293 amp @ 8Ohms load @ 42v rails

-_nando-_ · 11th September 2007, 06:30 AM

Hi !!

I would like to know, if the TDA7293 amp can handle an 8 Ohms woofer with + - unregulated 42v PSU. It falls at 39V at full power.

Would it be a "panzer" amp alone, or it must have another paraleled device to be really safe?

I built the one amp, and it's extremelly quiet, much less hiss than the LM3886.

Thank you very much !

Best Regards!

Johnix · 1st February 2008, 02:08 PM

It should handle such supply voltage as this chip is rated up to +/-50V

The only thing that must be taken into account is not dissipating more than 50W on the chip. But I can't find any formula to compute this dissipation...

-_nando-_ · 1st February 2008, 04:02 PM

The chips are running for months here at these rails, I didn't wait for the answer here.

Yes, definitivelly the chip can handle it.

danielwritesbac · 1st February 2008, 05:28 PM

Is there a schematic or perhaps a layout or kit for TDA7293? I'd sure like one.

11th September 2007, 06:30 AM	#1
-_nando-_ diyAudio Member Join Date: Dec 2005 Location: Sao Paulo	TDA7293 amp @ 8Ohms load @ 42v rails Hi !! I would like to know, if the TDA7293 amp can handle an 8 Ohms woofer with + - unregulated 42v PSU. It falls at 39V at full power. Would it be a "panzer" amp alone, or it must have another paraleled device to be really safe? I built the one amp, and it's extremelly quiet, much less hiss than the LM3886. Thank you very much ! Best Regards!

1st February 2008, 05:28 PM	#4
danielwritesbac diyAudio Member Join Date: Nov 2007	Very interesting! Is there a schematic or perhaps a layout or kit for TDA7293? I'd sure like one.

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1st February 2008, 02:08 PM	#2
Johnix diyAudio Member Join Date: Jul 2004 Location: Lyon (France)	It should handle such supply voltage as this chip is rated up to +/-50V The only thing that must be taken into account is not dissipating more than 50W on the chip. But I can't find any formula to compute this dissipation...

1st February 2008, 04:02 PM	#3
-_nando-_ diyAudio Member Join Date: Dec 2005 Location: Sao Paulo	The chips are running for months here at these rails, I didn't wait for the answer here. Yes, definitivelly the chip can handle it.

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