Constant current and voltage regulation

adam-guy

Newly Enlightened
Joined
Jul 26, 2014
Messages
3
Hi all!
I'm building light for my bike.
The power source is the li-ion bike main battery. rated at 36V
The light source is LED
30W
32-36 V
1050mA
link to ebay item:
http://www.ebay.com/itm/16131279469...eName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649
I don't know if i'm allow to post links... didn't read all the rules...


I've also bought a LED with this specs:
Input voltage: 32-34V
Power: 10W
Input Current: 900MA
Luminous Flux: 900-1000LM


The problem is that the battery should supply 42V when fully charged and as low as 34V when fully discharged. I'm not sure on the last one. I only know that the charger is 42V.


I need to regulate the voltage to be constant or the current to be constant (even better I think). but I can't find a CC or CV DC to DC power regulator that is a perfect fit for me.
BTW If i use constant voltage I could connect both leds in parallel.
If i use constant current I couldn't use same power supply cause they use different current.


please help me find the best solution :)
 
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