T
treez
Guest
Hi
We want to drive 350mA (average) through a Cree XT-E white LED. We want as much light output as possible.
What will be the difference in light output if we drive the LED with…..
..a) 350mA constant DC current (as in the red waveform attached)
..b) 350mA average but it’s a 500Hz triangle wave (as in the green waveform attached.)
The light_Flux vs Current graph at the top of page 27 of the LED datasheet (below) appears to suggest that the maximum “Light flux per Amp” comes at around 100mA.
Do you know what this curve looks like from zero Amps to 100mA?
Datasheet: Cree XT-E Lamp (350mA LED)
https://www.cree.com/led-components/media/documents/XLampXTE.pdf
We want to drive 350mA (average) through a Cree XT-E white LED. We want as much light output as possible.
What will be the difference in light output if we drive the LED with…..
..a) 350mA constant DC current (as in the red waveform attached)
..b) 350mA average but it’s a 500Hz triangle wave (as in the green waveform attached.)
The light_Flux vs Current graph at the top of page 27 of the LED datasheet (below) appears to suggest that the maximum “Light flux per Amp” comes at around 100mA.
Do you know what this curve looks like from zero Amps to 100mA?
Datasheet: Cree XT-E Lamp (350mA LED)
https://www.cree.com/led-components/media/documents/XLampXTE.pdf
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