So I purchased a laser with a NDB7875 X-Bucking Driver. 405 G-2 Lense. What kind of run time should I be getting out of that diode? I was told 30 seconds.
Well I bought this pre-built. I cant find out much on the host. It is the sajme one as the guy in this thread http://laserpointerforums.com/f65/my-new-9mm-445nm-chunk-host-2-4-x-drive-88718.html Could even be the guy I got it from on ebay. who knows. The only difference is the driver board is still enclosed and the entire diode and casing slips into the heatsinc. from what I can tell he has it at 2.3 amps.
Side note if anyone can tell me the type of host this is and a good source for heatsinc upgraded, I would appreciate it.
I have a related question as well, I have been looking at this diode's data sheet and it says absolute maximum rating is 1.7A and not to exceed maximum ratings.
But I also notice DTR sells it with a driver configured for 2.4A
What am I missing? I figured absolute meant absolute, but apparently not if it can be driven at higher amperage than 1.7A.
I figure the answer to my question involves duty cycles and maybe 1.7A is absolute max for a 100% duty cycle?
Thanks for the info, question answered! I was under the impression that if I passed an absolute rating the smoke would fly away, and I'm not sure how to put the smoke back in the parts so they work again.Yep on diodes that are marketed for the projector industry they have a new benchmark of 20K hours of continuous operation compared to 5K so they do need to lower their specs a bit to hit it. Also we do tend to run diodes harder than the manufacturer specifies and specially if going into a handheld even 5K hours is near an eternity for them. If you are putting it in a continuous running application you can think about backing it down a bit but even the projector guys do tend to run them harder as they are fairly cheap diodes and even if they only get a few thousand hours out of them it is a decent trade off for the power to have to replace a diode after that period of time. Anyway all being said yes 2.4A is above the manufacturer rating.:beer: