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Different results for FRA using LTpowerCAD and LTspice, Specifically LT8643S and LT8390

Category: Software

1805.FRA.zip

Hello

I have a different results for LT8643S based step-down converter.

LTpowerCAD report closed loop bandwith 100kHz, LTspice 130kHz.
Which of them can be trusted?


See attachment, please.

Anyway... LTspice FRA settings is very poorly documented, I can not find any application notes or other sourses.

Only single basic and very short information available at

ez.analog.com/.../generate-a-bode-plot-for-an-smps-in-ltspice-17-1



Added LT8390 to keywords. Expanded subject.
[edited by: MStokowski at 8:39 PM (GMT -4) on 12 Mar 2024]

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