Hopefully this has a simple answer. Concerning grounding Boost converters.

[Brad Hruska]

Hello all.

Hopefully this has a simple answer. I have 1 buck boost converter, (lct3780) Output 33v @10A, the other one is a 1500w boost converter.

I plan on only running 1 converter at a time

I am trying to find out if I can have a common ground on the DC- output on both converters with 1 wire

Essentially 1 wire going from the DC- on the 1500w to the DC- on the Ltc 3780 to the one stud for the Power output (where the banana plug gets connected.

Or does each converter need a designated ground wire to a designated power stud?

My concern is that because each converter is at a different voltage that the higher voltage will feedback( or try to feedback) to the converter with lower voltage even with one or the other is powered down.

 

[(*steve*)]

I think the answer is "yes".

 

[AnalogKid]

Maybe, depending on many details about the source to each converter, part numbers for both converter chips, the nature of the loads, and a connection drawing.

ak