From: Tong Narak
Subject: Re: Best way to power array of LEDs?
Date: Thu, 05 Dec 2002 14:19:17 +0700
Organization: C.S. Communications Co. Ltd.
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NNTP-Posting-Date: Thu, 5 Dec 2002 07:19:30 +0000 (UTC)
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Connect only one 3.01v still take ~150mA.
Each LEDs has it own characteristic.
So U can mix it in parallel as many company did it in headlight,
brake light, etc.
Tong Narak wrote:
> LED look like simple but it is not simple.
> In theory, you can't parallel LEDs.
> But in practicle, I can parallel superbright LEDs.
> Many car brake light, they parallel them too.
> I mixed by parallel 3.4v 3.5v 3.6v 3.01v (forward voltage LEDs @20mA)
> with a 3.6v regulator.
> The forward current will vary automatic with the increment of
> the input voltage.
> the one 3.01v won't hog all current as someone said in this thread.
> 3.01v take ~150mA
> 3.4v take ~60mA
> 3.5 take ~40mA
> 3.6 take ~20mA
> when remove the 3.01v LED, another LEDs still take the current
> at the same value.
> So. You can mix it in parallel. The lowest forward voltage LED
> will not hog all current.