Citi Cob Calculator?

[BDGrows]

Hey Everyone,
I was wondering if an update to the DIY COB calculator has been done to include Citizen chips yet or if you know of a citi calc? Im trying to calculate ppfd, ppf, heat sink capacity, etc with the old DIY Calc but id prefer to not have any guesswork in there. Thank you for your help.

-BD

 

[BDGrows]

I found this link, not sure if theres a better calc though....
https://www.dropbox.com/s/2s0xo583lw10m29/CitiCalculator.jar?dl=0

 

[coreywebster]

I found this link, not sure if theres a better calc though....
https://www.dropbox.com/s/2s0xo583lw10m29/CitiCalculator.jar?dl=0

Is that the one from the thread on here? If so I have it, its specific to citi cobs but doesn't have the new gen 6 cobs so the efficiency will be off a bit. It will give you a rough idea depending on chips.

 

[coreywebster]

Yeah its from here https://www.rollitup.org/t/diy-cob-led-calculator.890214/

 

[BDGrows]

Stupid question, but whats Tj? That the heat efficiency so like 85?

 

[coreywebster]

Stupid question, but whats Tj? That the heat efficiency so like 85?

https://en.wikipedia.org/wiki/Junction_temperature

 

[BDGrows]

Any ideas where I can find that for the CLU048-1212 80CRI gen6 3500k chips? Under Citi's optical characteristics its says Tj = 85C along with an asterisk next to 25C. So I assume the max is 85 but the optimal is 25?

 

[coreywebster]

Any ideas where I can find that for the CLU048-1212 80CRI gen6 3500k chips? Under Citi's optical characteristics its says Tj = 85C along with an asterisk next to 25C. So I assume the max is 85 but the optimal is 25?

@CobKits knows a lot more than I do about every cob there is. I think he stocks those and tests most things.
Hopefully he will chime in.

 

[CobKits]

25 is arbitrary, not optimal

max Tj on gen 6 is 150C. most builds will operate in the 50-80C range the way we use them

datasheet: http://cobkits.com/wp-content/uploads/2017/03/CLU048-1212C4_P3811_1116-GEN6-80.pdf