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| Authored by: Anonymous on Monday, October 15 2012 @ 08:08 PM EDT |
No, the way to regulate an LED is to regulate the current. I don't know what
will happen if the peak current in each pulse exceeds the mazimum current for
the LED.[ Reply to This | Parent | # ]
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| Authored by: Anonymous on Monday, October 15 2012 @ 11:47 PM EDT |
LEDs come rated for both peak current and average power dissipation.
This is because an LED is most efficient in converting energy to light at the
highest current it can sustain without immediate thermal damage.
Thus, the LED manufacturers (since the days of calculators with LED
displays, at least) expect you to pulse high current at low duty cycle and
moderately high frequency in the LED to get the maximum brightness to
the human eye, which won't percieve the rapid flickering, having response
delays of about 100ms.
Not that you can't simply regulate the current to regulate the brightness, but
you will not be able to get as much brightness out of it, or the brightness
you do get will cost you more heat and battery compared to pulsing it. This
inefficiency may or may not matter depending on circumstances.
(Christenson)
[ Reply to This | Parent | # ]
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