D
Death StoNeD
- 27
- 3
Alright so here we go first diy cob build...
So im going to hook up 5 parallel strings of 2 parallel cobs each on a cpu heatsink+fan using a single power supply(36v 11A) 5step up buck converters(one on each string for the leds) and one step down to run the 10 fans.
List of equipment
10 CXA2530 5000k 3800lm ( 37v 800ma but will be run at 750ma)
10 heatsinks + fans
5 step-up ( 250w 10a (8.5 to 48v in) (12 to 50v out))
1 step-down (36v to 12v)
6 electrical boxes (for buck converters)
1 36v 0-11A power supply(400w)
power distribution block
Thermal paste
25ft 14gauge solid wire
Small metal bars to screw heatsink to
So the cobs can take 1600ma max and need 37v at 800ma so i will run 5 strings of 2 at 1500ma using a stepup so if a cob goes out the other one wont burn.
So if my math is right 10x750ma is 7.5a X 36v(270w) + 10 x (12v x ~120ma) (15w) my overall power would be about 285W.
So power supply to distribution block will give me 6x 36v (5 with step up cc/cv and one with step down cc/cv)
Then i will have 6 matching negatives paralleled to the same block going back to power supply.
But for some reason this all sounds way too simple... am I missing something? Do I need some sort of a resistor or would the step-up unit include that? Do I need something between my -36v and -12v before they all go back to the power supply?
So im going to hook up 5 parallel strings of 2 parallel cobs each on a cpu heatsink+fan using a single power supply(36v 11A) 5step up buck converters(one on each string for the leds) and one step down to run the 10 fans.
List of equipment
10 CXA2530 5000k 3800lm ( 37v 800ma but will be run at 750ma)
10 heatsinks + fans
5 step-up ( 250w 10a (8.5 to 48v in) (12 to 50v out))
1 step-down (36v to 12v)
6 electrical boxes (for buck converters)
1 36v 0-11A power supply(400w)
power distribution block
Thermal paste
25ft 14gauge solid wire
Small metal bars to screw heatsink to
So the cobs can take 1600ma max and need 37v at 800ma so i will run 5 strings of 2 at 1500ma using a stepup so if a cob goes out the other one wont burn.
So if my math is right 10x750ma is 7.5a X 36v(270w) + 10 x (12v x ~120ma) (15w) my overall power would be about 285W.
So power supply to distribution block will give me 6x 36v (5 with step up cc/cv and one with step down cc/cv)
Then i will have 6 matching negatives paralleled to the same block going back to power supply.
But for some reason this all sounds way too simple... am I missing something? Do I need some sort of a resistor or would the step-up unit include that? Do I need something between my -36v and -12v before they all go back to the power supply?