Hi, I won’t be able to specifically comment the layout as I’m somewhere in Crête, on my mobile, in vacation…
But, I encourage you to have a look to the following thread where we had some generic comments regarding pcb layout of a chip amp running single supply.
https://www.diyaudio.com/community/threads/lm1875-noise.399138/
Chris
But, I encourage you to have a look to the following thread where we had some generic comments regarding pcb layout of a chip amp running single supply.
https://www.diyaudio.com/community/threads/lm1875-noise.399138/
Chris
Input capacitor C1 is reversed.
Suggest that you look for pcbs already designed, unless this is for educational purposes.
Example of a mono board:
https://www.amazon.com/TDA2050-12-24V-Amplifier-Adjustable-603540mm/dp/B07KKDY79S
Suggest that you look for pcbs already designed, unless this is for educational purposes.
Example of a mono board:
https://www.amazon.com/TDA2050-12-24V-Amplifier-Adjustable-603540mm/dp/B07KKDY79S
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By reversed you mean, that the polarity is wrong? Positive of C1 is not supposed to be connected to input signal?
Positive terminal should be connected on TDA2050, see post #13.
As tda is used in single supply it is biased at half supply by the divider on minus input.
By the way schematic in post#1 is wrong as this decoupling cap is reversed. This schematic come from UTC datasheet which is exact copy of the original one from ST, I guess you reproduced the datasheet schematic.