Re: Inductor question

"Christopher X. Candreva" wrote:

> There is also some damage to the r/g/b amps on the AVG board. It looks like
> it might be old and already fixed, but badly, and at least one of the
> inductors is blacked. These are listed as
>
> 830 mA, .29ohm, 1.0uH
>
> I've never speced an inductor, but from theory you would ideally want it not
> to have any resistance. So the current rating should be a minimum, a LOWER
> ohm rating would be OK, and obviously the correct number of uH .
>
> Correct ?

A current spec on an inductor is there for one (or both) of two reasons.
    1) Because more current will cause damage.
    2) Core saturation. As current increases magnetism increases. At some
point the core will saturate and inductance will drop.

> -Chris
>
> ==========================================================
> Chris Candreva -- chris@westnet.com -- (914) 967-7816
> WestNet Internet Services of Westchester
> http://www.westnet.com/
>
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