True Olin.  I could have looked em up in one of my many books or on the web
too.
I was just too lazy.  Besides, I am mostly doing digital now so this is a
bit off my strong-side.

    Kyrre


----- Original Message -----
From: "Olin Lathrop" <olin_piclist@EMBEDINC.COM>
To: <PICLIST@MITVMA.MIT.EDU>
Sent: Saturday, November 22, 2003 9:20 PM
Subject: Re: [EE:] Design-ideas for high current DC-DC stepup-converter ?


> Kyrre Aalerud wrote:
> > Yeah.  You are right.  A single step-up then use the regular
> > buck-solution with energy-storing coil for output again makes for
> > simplest design.  If I limit myself to 24v and 3-5 amps it should be
> > a lot simpler.
> >
> > You have a refresher-cource on the inductor math?
>
> Surely the basic inductor math can be easily looked up on the web or
> elsewhere.  Basically, the slope of the current is proportional to the
> applied voltage (and vice versa or course):
>
>      V * S
> A = -------
>        H
>
> where A is the current change in amperes, V is the electromotive force in
> volts, S is the time the voltage is applied in seconds, and H is the
> inductance in henrys.
>
> If you're a little confused, it might help to write down the other 3 forms
> of this equation each solving for one of the other variables:
>
>      V * S
> H = -------
>        A
>
>      A * H
> S = -------
>        V
>
>      A * H
> V = -------
>        S
>
> While you're at it, write down the equivalent 4 forms of the equation
> describing the relationship between amps, volts, seconds, and farads:
>
>
>      A * S
> V = -------
>        F
>
>      A * S
> F = -------
>        V
>
>      V * F
> A = -------
>        S
>
>      V * F
> S = -------
>        A
>
> And the three forms of Ohms law describing the relationship between volts,
> amps, and ohms:
>
>      V
> A = ---
>      O
>
>      V
> O = ---
>      A
>
> V = A * O
>
> Write down these 11 equations and tack them up where you do your
electronics
> design.  You'll may be amazed how far you can get with just these 11 forms
> of 3 basic equations.
>
>
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