Hello everybody
For testing I did an analog prototype board with the TAS5615 and discovered a distortion at low volumes at both channels A/B and C/D. At higher volumes it works fine. At least I can not hear any distortion. When I tight the A/B input to ground the C/D channel works fine. I checked the solder connections for shortcuts and contact. Then I replaced the TAS5615 with no result. Finally I discovered if I remove the bootstrap Capacitor A connected between pin36 and pin34 it works fine at low volumes. Obviously I get a distortion at higher volumes due to the missing bootstrap C.
Any ideas?
Find the layout attached. Ground plane not shown.
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