Luminus CXM-32 Gen3 the next big thing??

bassman999

bassman999

Well-Known Member
kaivorth said:
Soooo perfect!!!

How can you tell it can run 4 like it says on the site?

I'm going to graph some CFM/W numbers from household fans compared to larger PC fans.
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It says 1.0amp at 12v, so you look what the fans you choose draw and and up the ma. For example if you have (4) fans that draw 250 ma or .25a then it would handle all of them, I am not sure if ading more would stress it, or just give them less current.
 
K

kaivorth

Active Member
bassman999 said:
It says 1.0amp at 12v, so you look what the fans you choose draw and and up the ma. For example if you have (4) fans that draw 250 ma or .25a then it would handle all of them, I am not sure if ading more would stress it, or just give them less current.
Click to expand...
Ooooh... I was under the impression the amps are constant...I guess those must be constant current. Anyway I'm done derailing this amazing thread :)

I'll keep an eye on that driver when I get to building and ordering.
 
bassman999

bassman999

Well-Known Member
kaivorth said:
Ooooh... I was under the impression the amps are constant...I guess those must be constant current. Anyway I'm done derailing this amazing thread :)

I'll keep an eye on that driver when I get to building and ordering.
Click to expand...
I run 12V wall warts, but the MW would be more stable and reliable,r
The curernt is shared over the load.
This is somewhat different in circuitry than I driver I believe, but I have used 24V led MW drivers for 24V and 48V fans with great success and have the ability to dim (Slow down ) the fans as needed
 
J

john0000

Well-Known Member
like for example we know cxb3950 are 56% percent at 1400ma .. is cxm22 more then 56% . Tryin to figure out the par
 
CobKits

CobKits

Well-Known Member
im not sure i have a lot of confidence of that 56% figure in actual applicaiton, but heres a cxm22 compared with a cxb (spot par test at 12"). one goofy data point in there (low current measurements are tough to do accurately, but you can see the trend. id say at 1400 mA (74W) the cxm22 is just about as efficient as the cxb at 1400 mA (48W)

upload_2016-12-25_21-48-37.png
 
CobKits

CobKits

Well-Known Member
sounds about right. heres the equivalent cxb at the same 85C Tj. seems to fit with the relative cxm22 data, similar efficacy at 50W to the cxm @ 73W. the simulators are 3000k vs 3000k, the graph was 4000k vs 4000k, but the relationship is the similar in either case. that actually was a 70cri db cree in the test in that graph, so an 80 cri cd bin would be one bin lower (unless cree 4000k 80cri is into DB these days, i dunno)

upload_2016-12-25_23-4-34.png
 
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bassman999

bassman999

Well-Known Member
CobKits said:
sounds about right. heres the equivalent cxb at the same 85C Tj. seems to fit with the relative cxm22 data, similar efficacy at 50W to the cxm @ 73W. the simulators are 3000k vs 3000k, the graph was 4000k vs 4000k, but the relationship is the similar in either case. that actually was a 70cri db cree in the test in that graph, so an 80 cri cd bin would be one bin lower (unless cree 4000k 80cri is into DB these days, i dunno)

View attachment 3861200
Click to expand...
Similar Lm/W but at much different VF
 
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