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'[EE]: Another LED Drive question'
2002\09\06@150439 by Hazelwood Lyle

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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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2002\09\06@162926 by Harold M Hallikainen

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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 <spam_OUTLHazelwoodTakeThisOuTspamMFGNC.COM>
writes:
{Quote hidden}

FCC Rules Online at http://hallikainen.com/FccRules
Lighting control for theatre and television at http://www.dovesystems.com

Reach broadcasters, engineers, manufacturers, compliance labs, and
attorneys.
Advertise at http://www.hallikainen.com/FccRules/ .


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