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killed my o-like's driver.. replace with AMC7135?

Krutz

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help needed!

i filed down the original board from my 80-120mw (?) o-like greenie module. in several steps, checking that everything works. at one point it must have passed away.. must have cut away a via or some connection under the laque that i didnt see or something..
anyway, it was a pain anyway, too large driver and all.

the laser got 650mA. now i have some AMC7135 chips laying around. each putting out 350mA constant. anything speaking against using two of these directly on the pumpdiode? i will drive the whole with a single rcr123a.

please, stop me, or something! cant. control. it! aaaaah, the tension! dont know hoe long i can wait! *slaps other hand which got out of control already*

manuel
 





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I believe those drivers can be run in parallel and stacked like coins to save space, if so, then it would seem as thou you would have a viable solution. Two drivers would give you 700ma and nothing looks wrong with that(only 50ma more than original) Anyone feel free to correct me if i am wrong.
 

Krutz

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grrrrrrrr again the forum ate my post.. "token expired"...

anyway.

you are correct, gryphon, the 7135 comes stacked as LED drivers from DX roo. in 350mA, 700mA, up to 1.4A lately.

the chip has something like a common positive, so it should work nicely with case-positive diodes/hosts like my greenie. it will be difficult to use on LOC for example (case negative), 803t works too (case not connected).
i guess i will try it today or tomorrow.. could distract me long enough today with almost finishing the first of the three pointers, red and violet! :)

manuel
 

Krutz

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short update: before leaving for holidays, i built a driver with two amc7135. one chip worked, around 300mA as expected. with two on its original board, it didnt give much more current. replaced the second chip with another one, voila, 675mA. works flawlessly, module lases green just fine. no longer tests yet, but so far, nothing nasty happened. and yes, thats just two amc7135 chips, each the size of a grain of rice, in parallel. no extra parts at all. will write/show more once i`m back home!

manuel
 




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