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I'm trying to understand how to design a boost converter and have been reading about them for the past week or so. I've come a long way and now understand basically how they work, but I have a couple of questions on some things that are confusing me.

The first thing that is confusing me is the equation:

Vout/Vin = 1/(1-D)

I understand how the equation is derived (i.e. I can do the math), but it doesn't really make sense to me because the voltage across an inductor is proportional to the rate of change of current through it; so doesn't it seem like the voltage gain should be related to thefrequencyand not theduty cycle? This is one thing that I'm really confusing about.

The other thing I'm unsure of is how to determine the appropriate frequency and inductor values for the circuit. None of the articles I've read about boost converters really explain how to choose these values. Any advice?

I'm basically at the point where I'm pulling my hair out here, so any help would be VERY MUCH appreciated

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# Need help with boost converter design

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