Does anyone know if the bootstrap electrolytic on a chip amp like TDA2004/5 has an influence on the sound concerning its quality?
Can it make a difference if it is bipolar or even being parallel with a foil C?
Can it make a difference if it is bipolar or even being parallel with a foil C?
I would also like to know if there is a benefit increasing the values of bootstrapping C and feedback C on a chipamp like its written here with the wolverine amp for the feedback C:
https://www.diyaudio.com/community/...olverine-and-cordell-book.400341/post-7402196
Does the quality of the feedback C play a role? Should it be bipolar or makes it a difference if a foil is put in parallel?
https://www.diyaudio.com/community/...olverine-and-cordell-book.400341/post-7402196
Does the quality of the feedback C play a role? Should it be bipolar or makes it a difference if a foil is put in parallel?
If the bootstrapping is internally the same or very similar to what we see in TDA7293/4 then too low ESR might not be the best idea as could maximize the output current load step (charge pulse) when the bootstrap charge current is switched on/off by the internal circuit. The effect from this load step is reduced by the global feedback in the application and therefore it is important that the feedback resistor is physically attached at or preferably after the node for the bootstrap cap.
Higher capacitance keeps the bootstrap voltage more stable while charge current is off, thus better (very) low frequency behavior. I wouldn't go any higher 2x...3x the recommended value, though.
Higher capacitance keeps the bootstrap voltage more stable while charge current is off, thus better (very) low frequency behavior. I wouldn't go any higher 2x...3x the recommended value, though.
