DIY COB build troubleshooting help

CuriousFarmer420

CuriousFarmer420

Member
Looking for some help with wiring up my LED driver. I am using a Mean Well driver HLG-240H-54B and I am getting 54v out but no cobs lighting. Wiring 4 in series and started on pos side then neg to pos back to neg driver lead. No lights and unsure where to check next. Wiring between cobs seem tight in bjb holders. Not using a dimmer so just have those leads capped off for now. Don't want to remove cobs from heat sinks but unsure how to remove wires once in push in holder. Any suggestions much appreciated.
 
JavaCo

JavaCo

Well-Known Member
CuriousFarmer420 said:
Looking for some help with wiring up my LED driver. I am using a Mean Well driver HLG-240H-54B and I am getting 54v out but no cobs lighting. Wiring 4 in series and started on pos side then neg to pos back to neg driver lead. No lights and unsure where to check next. Wiring between cobs seem tight in bjb holders. Not using a dimmer so just have those leads capped off for now. Don't want to remove cobs from heat sinks but unsure how to remove wires once in push in holder. Any suggestions much appreciated.
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What cobs are you using? Those drivers are more for running parallel rather then series. You would have to have really low voltage cobs to get 4 of them in series on that driver around 13.5 volts a COB would get 4 of them on that driver running in series.
 
JavaCo

JavaCo

Well-Known Member
CuriousFarmer420 said:
I am using CXM22 gen 3 3500 90 cri cobs...they are 54v ea. Shouod they be in parallel?
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Yeah you are going to have to parallel them if you want to use that driver. When running in series the voltage multiplies so 4 of those cobs would need 216 volts if ran in series. In parallel the voltage stays the same and you divide the amps of the driver by how many cobs your going to run, so in the case of the 240-54 it is 4.45 amps or 1.11 amps per a cob if you run 4 in parallel.
 
JavaCo

JavaCo

Well-Known Member
This would be the Driver to use to run them in series. HLG-240H-C1050. Not sure what luminous says about running in parallel but most companies dont recommend doing so. With Bridgelux gen 7 you can but you have to match voltage bins to run in parallel. Since all your chips are the same you might not have a problem with current hogging. Luminus should have some design documentation that might be worth a read.
 
CuriousFarmer420

CuriousFarmer420

Member
I will do some reading and I think parallel was what cobkits was implying when suggesting 5 slot wagos...but almost everything I read was talking series wiring and had that in my head.
 
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