I use stuff from Allegro (http://www.allegromicro.com/index.htm) to drive
LEDs a lot. They have both sourcing and sinking drivers.

Harold

On Fri, 6 Sep 2002 15:01:30 -0400 Hazelwood Lyle <LHazelwood@MFGNC.COM>
writes:
> Hi All,
> I have found some bi-color 8x8 LED blocks to make a moving message
> sign.
> I'm trying to find the most cost-effective drivers to use. For each
> 8x8
> block I need 16 sinking drivers that can handle 80 ma each. That
> part is
> easy enough, I'm looking at TPIC6B273.(8 bit latch up to 150 ma per
> OC
> out)
>
> A bit more trouble are a set of eight source drivers. Each will be
> switching
> up to 1280ma, though only one will be active at any time.
>
> It's a "One Off", so a few pennies won't matter, but I'll have eight
> sourcing
> drivers for each 8X8X2 block, and I'm planning at least 8-12 of
> these
> blocks
> per display.
>
> I can do discretes, but the cost X 8 X blocks goes up fast.
>
> My knowledge of semi driver options is a few years old, I'm betting
> there's
> something better than just using TIP125. 8^)
>
> TIA,
> Lyle Hazelwood
>
> --
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>
>

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