TDA7376B ratings?

whammoed · 20th March 2010, 02:29 AM

How do they come up with ratings on some of these chips? I was looking at the specs for TDA7376B:
2 x 25W/4ohm @ 14.4V, 1khz, 10%
but when I look at the graph for THD vs. Ouput power it seems it hits 10% THD before reaching 12 watts.
Can someone explain?

see pic for details

pacificblue · 20th March 2010, 09:04 AM

The 1kHz curve is the lower of the two. 10 % THD is the upper limit of the graph. It looks like the 1kHz curve hits the 10 % line at more or less 25 W.

Juergen Knoop · 20th March 2010, 12:54 PM

Quote:

but when I look at the graph for THD vs. Ouput power it seems it hits 10% THD before reaching 12 watts.
Can someone explain?

stumbled over the logarithmic graphs?
The line right of 10W is 20W not 11.
regards

whammoed · 20th March 2010, 03:58 PM

Thanks guys. Definitely read the graph wrong. Obviously should have just went to bed last night and looked again in the morning. I'm usually not quite that dense.

20th March 2010, 09:04 AM	#2
pacificblue diyAudio Member Join Date: May 2008	The 1kHz curve is the lower of the two. 10 % THD is the upper limit of the graph. It looks like the 1kHz curve hits the 10 % line at more or less 25 W. __________________ If you've always done it like that, then it's probably wrong. (Henry Ford)

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20th March 2010, 03:58 PM	#4
whammoed diyAudio Member Join Date: Jul 2005 Location: Indiana	Thanks guys. Definitely read the graph wrong. Obviously should have just went to bed last night and looked again in the morning. I'm usually not quite that dense.

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