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LT3966 and max channel current

Hello, i'm concerned about LT3966 SW pin max current specs. Basically i've used all 4 channels, 31V 1.8A each, should be good with a 4 layer pcb design and active cooling underneath or is it over-specs?

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  • Yes, the LT8391 is a part which can deliver the desired power. Maybe the LT8391A is ok as well and saves some space as higher switching frequency allows smaller inductor.


    For sure a much bigger design than one LT3966, but your power level does not allow for a simpler solution.

    kind regards

    Markus

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