2019-08-26 02:23 AM
Hello all,
Since i was not able to find thread for Power Monitoring ICs, hence, posting my question here.
I am using STPM33 PM IC for my application and i have below queries:-
Kindly let me know the advantages of doing it this way and not having a single ground reference.
Thanks a lot in advance. Waiting for a positive reply.
Have a nice day!
Best Regards,
Yash
2019-08-26 08:03 AM
Welcome to the analog world.
A ground (indeed any wire or track or plane on a pcb) is not perfect. There is series resistance and inductance.
You will see both when you switch high currents, particularly if you have inductive loads.
And this will mean that different parts of the pcb that are nominally ground will actually be at measurably different voltages.
Separation of grounds, with them only joined at one point, is a way to keep the high, switched current away from anything that might be disturbed by the voltage differences.
I've no doubt that a good electronic text book that includes this will be able to explain it much better than I can.
Hope this helps,
Danish
2019-08-26 09:45 PM
Hi Danish,
Thanks a lot for your answer.
Request you to also answer my last three mentioned questions above.
Thanks a lot again.
Best Regards,
Yash