Combing Return Paths DC Power Supplies

Thread Starter

Annaconda

Joined Dec 13, 2005
1
Hi everyone. I have a triple source power supply and a single source power supply going into a PCB. Is it okay to combine the common legs/return paths of the triple and single supply, or do the two COMMs need to be kept separate? Thanks!
 

beenthere

Joined Apr 20, 2004
15,808
Hi,

You probably need to keep them common. Unless you've got mixed digital and analog supplies. By keeping the grounds together, you know where current flow is pathed, and noise problems shouldn't arise.
 
Top