Subject:
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Power saving on L293D???
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Newsgroups:
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lugnet.robotics
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Date:
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Tue, 6 Jul 2004 18:20:44 GMT
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Viewed:
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1089 times
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Hi,
I'm building my own controller to use with Mindstorms. I want to support 6
motors, with 3 L293D IC's. But I found that this IC needs about 25 - 30 mA on
the logic supply, when the chip is disabled. That means even if I dont use any
motors the current is 75 - 100 mA!!! This is more than my µC with 128k SRAM!
Is there a way to reduce the current? Maybe switching logic supply on/off of the
L293D?
Any ideas?
Bert
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Message has 1 Reply:
 | | Re: Power saving on L293D???
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| (...) Looking in an old Maplin catalogue from 1998, the entry for the L293D shows a total quiescent logic supply current of 16mA per chip, so 48mA total. Presumably you're using a 9V logic supply to match the RCX outputs? The output supply current (...) (20 years ago, 6-Jul-04, to lugnet.robotics)
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