Electronics > Beginners
Loud Speaker?
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madires:
If the supply voltage is 12V single rail the TDA1519B (in BTL mode) would give more power at a THD of 0.5% and you won't need the large cap at the output to block DC. There are also some more powerful amps in that family like the TDA1518BQ with 24W in BTL mode (or 2 * 12W in stereo mode). For single rail applications a car stereo amp is mostly the better solution. The TDA20xx is great if you got a dual rail supply like in a standard stereo.
SeanB:
All I did with mine was to use a TDA2009 on a premade board sold as a replacement for some rather unreliable STK modules in older television sets. Added a big heatsink and it runs nicely on 32V from an old inkjet printer power supply.
mariush:
madires, the IC is interesting but... if you dig deep in the datasheets you'll notice that it can typically do 10w at 8 ohm with about 14.4v input voltage, in BTL mode.
At 12v, it will pretty much go down to about 7-8w at 8 ohm, again, in BTL mode.  With just one speaker per channel, it will be about 3.5-4w, just a watt or a couple of watts above the tda20xx.

Chris is a beginner at electronics, so he won't easily understand the concept of BTL and doesn't have such nicely made application circuits and examples of pcb and a website showing off a ready made amplifier to get insipiration from, and in addition he only has two speakers right now.  He doesn't have four speakers, to put 2 speakers on each channel (which is needed for btl mode).

In addition, these ICs will only work at up to about 18v, while the TDA2050 works up to 50v - he can compromise now going for tda2050 and get only 2-3 watts on each channel running it from 12v and later when he finds a transformer with bigger output voltage, he'll get more power. With this tda1519, he'll be stuck at up to 18v and 11-12w in btl mode (or about 6w per speaker).

madires:

--- Quote from: mariush on May 28, 2013, 06:53:35 pm ---In addition, these ICs will only work at up to about 18v, while the TDA2050 works up to 50v - he can compromise now going for tda2050 and get only 2-3 watts on each channel running it from 12v and later when he finds a transformer with bigger output voltage, he'll get more power. With this tda1519, he'll be stuck at up to 18v and 11-12w in btl mode (or about 6w per speaker).

--- End quote ---

The decision which TDA fits better is based on the power supply. If it's around 12V the TDA151x is the better choice, if its >16V then the TDA20xx wins. No worries! :-)
ChrisGreece52:
Thank you all but i am confused.... i had not so many time to read in depth all the comments but here are some things that will make you life easier :P
My supply will be a 12 volt 1 amp ac to dc converter
I only need 1 channel (left or right ) or even both no prob.
I need adjustable gain with caps or resistors
I need it to be loud but no so easily distorted
As for heat dissipation its ok ill use a big ass heatshink or even combine a small heatshink with a fan for maximun cooldown :P
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