I have two power supply board that have plus and minus 65v and the same boards have an independent 12 v supply with a separate ground from. Will this cause any issues with the EPC9192 board?.
Thanks for looking into the EPC9192 Class-D Audio board. In short, the grounds should be tied together, they will be tied together on the board. Perhaps the best look at the power distribution of this board is to look at the details in its schematic. To do that, go to this board’s home page: https://epc-co.com/epc/products/evaluation-boards/epc9192 . And then open the schematic link, https://epc-co.com/epc/documents/schematics/EPC9192_Schematic.pdf The upper-left of the first page is a complete power diagram, showing which ground(s) go to what.
I hope this helps!
- Brian Miller, field application engineer, eastern Americas