You need to read National Semiconductor's explanations of circuit
action for their "simple Switcher" devices.

On Fri, Dec 4, 2009 at 2:36 AM, Moreira, Luis A <Luis.Moreira@ccfe.ac.uk> w=
rote:
> Hi Guys,
> I am looking at boost converter design at the moment and I came across a
> lot of useful and interesting information on the web, but with that I
> found a few discrepancies that I would like some advice with.
> On one of the sites I found it says that the forward diode should be
> dimensioned to be able to handle at least current equal to the peak
> current on the inductor, I can not see why, as the diode should never
> see that current. Am I missing something here? What value of max current
> would you use for this diode normally on your designs? Best Regards
> =A0 =A0 =A0 =A0 =A0 =A0Luis
>
>
>
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