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Originally Posted by lutach
Artur,
On the Schulze controller, I see the small SMT resistors next to were the MOSFET goes. If I wanted to make extra powerboars, would thee work with the same resistance or would I have to use different resistance for everything to work ok? The reason I'm asking is because I see a few controllers that stack powerboards to up the AMP rating.
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If you noticed, I'm not using them because I have them on my power board. If you stack power boards (identical) there is no need to change resistors (but they need to be tuned if you happen to replace stock fets with newer/better ones).
So if you have two schulze controllers then you can make a double decker, like mambamax with minimum effort. But do not exceed the current ratings of the fet drivers, do the math with# of Fets, # of resistors in parallel, Rg and switching frequency. But with 2 boards you should be Ok, otherwise start sharing resistors and fight with ringing.
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What's the current limit on these proto-types?
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Probably PCB limited to 75A, Fets are 330W rated up to 160A at 100C