- Mon Jan 02, 2017 10:45 am
#192716
Greetings everybody!
First post so I apologize if this is in the wrong forum or if it's been covered before. I did search but couldn't find what I was looking for.
I have a 3 watt green LED with a forward voltage of 3.2-3.4 volts. Max forward current is 750 mA. It is powered by a drone battery which puts out 16 volts @1.1A. The voltage is reduced by using a DC-DC buck converter with 1A capability.
(Voltage regulating but not constant current, yes,I know the proper way to control LED's is through current not voltage).
Checking the current draw, I found it is about 280 mA. I then ran the output of the converter to the input of a constant current regulator connected to the LED. The C-C regulator is adjustable from 80-800 mA. Input voltage 2.2-6 volts. The current draw of the LED remained the same, no matter how the C-C regulator is adjusted. I can turn the current down from 280 but no higher.
So, my question, is there any way to "pump" more current through the LED (to increase brightness) or does the LED decide how much it's going to draw?
Thanks!
First post so I apologize if this is in the wrong forum or if it's been covered before. I did search but couldn't find what I was looking for.
I have a 3 watt green LED with a forward voltage of 3.2-3.4 volts. Max forward current is 750 mA. It is powered by a drone battery which puts out 16 volts @1.1A. The voltage is reduced by using a DC-DC buck converter with 1A capability.
(Voltage regulating but not constant current, yes,I know the proper way to control LED's is through current not voltage).
Checking the current draw, I found it is about 280 mA. I then ran the output of the converter to the input of a constant current regulator connected to the LED. The C-C regulator is adjustable from 80-800 mA. Input voltage 2.2-6 volts. The current draw of the LED remained the same, no matter how the C-C regulator is adjusted. I can turn the current down from 280 but no higher.
So, my question, is there any way to "pump" more current through the LED (to increase brightness) or does the LED decide how much it's going to draw?
Thanks!