I built a board based on the TPA3122 diagram in the datasheet. It did not work, so I built another with exactly per the drawings, and also those from a kit (jerryselectrionics.com). It too does not work. Maybe someone can see an error if you have time to look at it.
Red Positive, Green Ground, Blue Right input, Yellow Left input, White + Output, Black - Output.
When I give this 24VDC (+24,0) and a 60Hz 1.5V wave input, I hear nothing except some rythmic popping, about every 1 second. The scope shows no wave, but a little burst of noise each second.
I have the SD pin high, and Mute pin low. I have looked very closely for solder traces between pads.
Any comments would be appreciated.
Curt
(209) 483-3910