DiY LEDs - How to Power Them

Michoacanna

Michoacanna

New Member
PurpleBuz said:
for a primary veg light get any of the cobs with a temp 4 K or higher. I prefer 5K or higher. Depending on your setup The cheaper smaller cobs like vero18, vero10, cree25XX or cree 3070 are more than adequate and will perform great for veg (smaller cobs can sit closer to the canopy, keeping the youngins warmer). I'm slowly replacing my T5s that I normally use for veg.
Click to expand...
Thanks for the reply purplebuz. Any links of where I can buy these Cree and drivers?
 
Michoacanna

Michoacanna

New Member
Rahz said:
Digikey is where a lot of people buy the cobs, kingbright may have lower prices though. For COBs and drivers just do a search for the part number and you'll get lots of hits. Also check octopart which is a parts search engine.
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Thanks rahz
 
Sxott

Sxott

Well-Known Member
Looking to power 2x vero 29 (5000k) at around 1.8 amps?

All I can see is LPF-90D-48
These will work but spending 100 bucks seems crazy for just 2 leds chips.
 
Sxott

Sxott

Well-Known Member
One more question.
Can you put some star leds in series with your cobs if they use the same current?
I have 16 volts to spare on by 3000k build and would like to throw in some 3v royal blues.
I have an hlg-185h-c1050 with 5 cxb3070s. That leaves me with 16 volts to spare on each driver.
 
frica

frica

Well-Known Member
Sxott said:
One more question.
Can you put some star leds in series with your cobs if they use the same current?
I have 16 volts to spare on by 3000k build and would like to throw in some 3v royal blues.
I have an hlg-185h-c1050 with 5 cxb3070s. That leaves me with 16 volts to spare on each driver.
Click to expand...
If they use the same current and you have spare volt left then it should work
 
salmonetin

salmonetin

Well-Known Member
...the direct link dont go for me .. but maybe this helps a bit.... i like the reads...:fire: ...thanks for the link nge...;)

Understand the Hidden Costs of free 0 - 10 V LED Dimming Drivers

http://www.ledsmagazine.com/articles/print/volume-12/issue-6/features/developer-forum/understand-the-hidden-costs-of-free-0-10v-led-dimming-drivers.html

FOCUS ON: Robust LED Drivers are Critical to Enabling Quality solid-state lighting

http://www.ledsmagazine.com/articles/2014/07/focus-on-robust-led-drivers-are-critical-to-enabling-quality-solid-state-lighting.html

Controlling LED lighting systems: introducing the LED Driver

http://www.ledsmagazine.com/articles/2004/12/controlling-led-lighting-systems-introducing-the-led-driver.html

Driving LED lamps – Some Simple Design Guidelines

http://www.ledsmagazine.com/articles/print/volume-4/issue-8/features/driving-led-lamps-some-simple-design-guidelines.html

Simplifying the Sophisticated: LED Driver Selection made easy

http://www.ledsmagazine.com/articles/print/volume-11/issue-4/features/specification/simplifying-the-sophisticated-led-driver-selection-made-easy.html

Proper Driver Design eliminates LED light strobe flicker

http://www.ledsmagazine.com/articles/print/volume-11/issue-4/features/developer-forum/proper-driver-design-eliminates-led-light-strobe-flicker.html

Low-voltage LED lamps present unique driver challenge

http://www.ledsmagazine.com/articles/print/volume-9/issue-2/features/low-voltage-led-lamps-present-unique-driver-challenge-magazine.html

ANSI recognizes need for LED Driver Testing Standards

http://www.ledsmagazine.com/articles/print/volume-11/issue-5/features/standards/ansi-recognizes-need-for-led-driver-testing-standards.html

:peace:

Saludos
 
Sevren

Sevren

Well-Known Member
Driver question for the HLG-185H-C1400. Is it possible to run 3 CXB3070's and 1 CXA3070's off one? They have different Vf but they equal out to 142.77 out of the maxed out 143 Vf
 
salmonetin

salmonetin

Well-Known Member
Sevren said:
Driver question for the HLG-185H-C1400. Is it possible to run 3 CXB3070's and 1 CXA3070's off one? They have different Vf but they equal out to 142.77 out of the maxed out 143 Vf
Click to expand...
...my estimation... i hope my numbers are ok...

3 CXB3070

Vf @ 50ºC @ 1400mA = 35,59 * 3 = 106,77 V ....4 = 142,36 V

1 CXA3070

Vf @ 50ºC @ 1400mA = 37,30 V

Vf tot = 106,77 + 37,30 = 144,07

Saludos
 
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