Introducing CobKits.com - specializing in DIY and Citizen COBs

Diskokobaja

Diskokobaja

Well-Known Member
You dimmer them or what?? Im dzmmy for all that el. tech talk.. I order parts and my buddy set it up.. I need driver for non dimmable cobs.
 
CobKits

CobKits

Well-Known Member
DesertHydro said:
im using a hlg185 48a to run 4 cxm22 at 50w each but it will go up to ~62.5w each if i crank it up all the way. im using constant amperage. not sure about the constant current drivers.
Click to expand...
measured on AC or DC side? that sounds high on the DC side as the driver maxed is ~55-57W per cob (1060 [email protected]). but yes at 92-94% eff it will pull 240-245W at wall
 
visajoe1

visajoe1

Well-Known Member
cobs, im testing my electrical learning here. if i used my 12v 10a dc converter
upload_2017-3-25_17-20-12.png
hooked up to this 900w cv/cc adjustable boost converter
upload_2017-3-25_17-20-57.png
would i have an adjustable driver for 36-72v chips and up to 900 watts of power?
 
1

1212ham

Well-Known Member
Hard to say what the efficiency will be. I seemed to get power surges with the 600 watt version of that variable supply. The constant current is not working on my supply and I think a surge may have damaged it. I'll probably buy another to play with, maybe the version with trim pots rather than the digital control. BTW, I was just running 36v COBs with three 12volt computer supplies connected in series.
 
visajoe1

visajoe1

Well-Known Member
1212ham said:
Hard to say what the efficiency will be. I seemed to get power surges with the 600 watt version of that variable supply. The constant current is not working on my supply and I think a surge may have damaged it. I'll probably buy another to play with, maybe the version with trim pots rather than the digital control. BTW, I was just running 36v COBs with three 12volt computer supplies connected in series.
Click to expand...
efficiency of the booster? here is specs

Technical parameters:
Input voltage: 8-60V
Input current: 0-15A
Output voltage: 10-120V
Output current: 0-15A
Output power: 900W(MAX)
Conversion efficiency: 85%
Working frequency: 150KHz
Short circuit protection: 20A fuse
Operating temperature: -40℃-+85℃
Control method: Numerical control+Digital tube monitor
Voltage adjustment: <100V/0.01V
Display resolution: >100V/0.1V
Minimum resolution of power display: 0.001W
Current adjustment: <10A/0.001A
Display resolution: >10AS/0.01A
Minimum resolution of capacity: 0.001AH
Output ripple: ≤50mV
Dimension: 110(L)*99(W)*46(H)mm

- Memory function, 10 sets of parameters can be saved.
- With OUT(output),CV(constant voltage),CC(constant current) indicators.
- Can manually set whether the booster output automatically when power on or not.
 
1

1212ham

Well-Known Member
CobKits said:
ive had mixed results with those. i think dedicated led psus are worth it in every regard
Click to expand...
Quality LED drivers may cost more initially, but they are more efficient and very reliable. I think of it as an investment, they will probably run for decades.
With 12v power supply feeding a boost converter the efficiency losses add up. I do like the cheap constant current/constant voltage converters for experimenting and testing.

Visajoe, when I connect power to my digital booster the LED flashes from a power surge, even with low power settings or the output turned off. I also have the smaller 250 watt booster you pictured, no surges with that one. This is all getting off topic, maybe I'll start a thread on alternative and experimental drivers.
 
visajoe1

visajoe1

Well-Known Member
1212ham said:
Quality LED drivers may cost more initially, but they are more efficient and very reliable. I think of it as an investment, they will probably run for decades.
With 12v power supply feeding a boost converter the efficiency losses add up. I do like the cheap constant current/constant voltage converters for experimenting and testing.

Visajoe, when I connect power to my digital booster the LED flashes from a power surge, even with low power settings or the output turned off. I also have the smaller 250 watt booster you pictured, no surges with that one. This is all getting off topic, maybe I'll start a thread on alternative and experimental drivers.
Click to expand...
ya, i dont wanna hog cobs thread, lets fire up a thread for powering cobs with alternative supplies with pros/cons do's and donts. your feedback on digital booster is awesome. for testing or short term use, something like these could work for some folks?
 
CobKits

CobKits

Well-Known Member
just to expand a little bit, i had a few of those around in an industrial environment for 24V alarm/signaling, so i thought they were cool. so i bought a 400W one to try to run a 3618 light engine out and it wouldnt light it. more like flash>click>flash>click>repeat. it couldnt provide stable voltage even though it was in spec.

i actually have the real deal hlg480-3500 coming this week so we'll see whats up with 400W cobs
 
visajoe1

visajoe1

Well-Known Member
CobKits said:
just to expand a little bit, i had a few of those around in an industrial environment for 24V alarm/signaling, so i thought they were cool. so i bought a 400W one to try to run a 3618 light engine out and it wouldnt light it. more like flash>click>flash>click>repeat. it couldnt provide stable voltage even though it was in spec.

i actually have the real deal hlg480-3500 coming this week so we'll see whats up with 400W cobs
Click to expand...
400w to a single cob?? i def wanna see that
 
You must log in or register to reply here.
Top