From: Watson 'Atto Parsec' Name
Subject: Re: Q. About ICs for Driving White LEDs
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Date: Sun, 6 Oct 2002 16:53:58 -0700
NNTP-Posting-Date: Sun, 06 Oct 2002 16:46:17 PDT
Organization: InReach Internet
In article ,
firstname.lastname@example.org talked about...
> In sci.electronics.design Watson 'Atto Parsec' Name wrote:
> > see what disadvantages they have, which don't always become apparent from
> > looking at the data sheets. I've noticed that some chips run at 1 or 2
> > MHz, which seems high and might cause some EMI, however it probably isn't
> > very widespread.
> Running at high frequency is a great advantage when you come to picking
> the inductor- a tiny SMT part might take the place of a much larger unit
> for a given current.
Yeah, I've run into the stark fact that most of the chips are SMDs too. So
that would be okay if I could get the evaluation board. But I would prefer
that the chip was 8-pin DIP, since it will easily fit into a flashlight.
But the problem is that it's hard to get those surface mount inductors, and
even harder to work with them if you need to unwind a few turns.
> Best regards,
> Spehro Pefhany
My email address is whitelisted. *All* email sent to it
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