Hi,
I use a microprocessor at 3.3 Volt to control the source driver TLC59213.
VCC/VDD for the output is from another circuit at 12 Volt.
Should I connect the GND of the TLC59213 to the GND of the microprocessor or the GND of the 12 Volt source?
I would expect the GND of the microprocessor (for the return path of the control current), but fig 4 in the datasheet suggests the GND of the high voltage source.
I can connect the GNDs of both circuits, but I am scared to introduce ground loops.
And more over, how can I know that the current flowing to microprocessor GND is not too high?
