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Reducing Gain of TDA8233

Hi,

I was wondering if anyone knows if its possible to reduce the gain of a TDA8233? The data sheet is a bit light on...

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I would like to run one at 9V and feed in 1Vrms to get 1W into 8R. I know I could reduce the input with an R-R network but it seems silly to attenuate it only to amplify it again. Perhaps someone could recommend a better IC? I have also been looking at the TBA820 but am also confused about how to adjust the gain of that as well.

Any help appreciated.

Best regards,

Adrian

Reply to
AJ
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TDA7052A may do what you want. only the 'A' version has a gain adjust. The

7052 doesn't.
Reply to
TT_Man

Have you tried some resistance in series with pin 7.

Reply to
Winfield

Thanks heaps, looks interesting, I can set the lower gain with the volume control which is nice. I don't understand how to calculate the power dissipation though? And in the text it says the volume control is 80dB range but on the graph in figure 3 it shows > 100dB. Am I missing something?

Regards,

Adrian

Reply to
AJ

Thanks for the reply Win. I Don't actually have a TDA7233 (not TDA8233) to play around with yet as im still trying to choose the best one. I am from Australia and I think Digikey is the only place I can get these parts from easily so I want to choose carefully.

I have noticed on the TBA820 (that I can get from Farnell) they use a resistor but I don't really understand what's going on there and it not very well documented. It would be nice to have an amp that I could run from

9-12V with a gain of 6dB so I could get around 1W in my speaker.

Regards

Adrian

Reply to
AJ

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