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FrozenGate by Avery

Mitsubishi 300mW - Died at 1A?

Wolfman29

Wolfman29

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Hey everyone.

I just got a Mitsubishi 300mW for my first 635nm build (was building it for sale) and I was under the impression that 99% of these diodes can handle 1A of current. Is this true? Right when I hit 1A, I got the dreaded dimming. I immediately lowered the power and it still lases, its just zombied now (is this normal for these too?). I was under the impression that these were as durable as the 445s when it comes to dimming, etc.?

Maybe I was just too ambitious with this diode?
 





If the diodes are overdriven there is a chance of failure, no matter how small the chance is. They can even fail at nominal current. You just hit that 1%. :(

My Mitsubishi diode at 1050mA is still running fine. I feel sorry for you losses.
 
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You could of gotten a poor efficiency diode that just fried itself...it happens sometimes... after all there's alot of luck involved in LASERS.
 
poor you (and diode). mine is driven at 750ma and runs fine, but i dont even think about cranking up the current.
 
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Yeah :\ Ah well. Next time I'll ramp it up more slowly and get readings to make sure it's not poor efficiency. Also, limiting the current to 854mA may help :P
 
I'm running mine at around 600mA on a custom LM3405 buck driver and getting around 500mW. I did it before RHD started selling these 1A kits and everyone was careful with them back then. It still happily lases.
 
I normally recommend 750-800mA as a max but not really for fear of burning it out but that is where I think it can run for a minute pretty stable with a good heatsink and not have the wavelength shift too much.:beer:

I am sorry for your loss. It really is no fun having the built up anticipation of a sweet build crushed by a loss.:yabbem:
 
The fact that we're lamenting the loss of a 635nm diode dying at over an Amp of current--as a somewhat unnatural event--really shows how far we've come.
 
Yeah - DTR, I noticed you cancelled the shipment of the second diode (I'm "Robin Blitz" - that's my mom's name :P ) and immediately sent another shipment or something?

Anyway, yeah, I am going to stick with .854A this time, assuming it's an efficient diode. May even lower the current further, depending.
 
Johnyz said:
I'm running mine at around 600mA on a custom LM3405 buck driver and getting around 500mW. I did it before RHD started selling these 1A kits and everyone was careful with them back then. It still happily lases.
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I don't think I ever sold 635nm kits... ?!?
 
daguin said:
10mW blu-ray box-type lasers @ $155 (2007)

http://laserpointerforums.com/f39/bluray-box-24794.html

Peace,
dave
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Yea but you could overdrive them to 15mW.:rolleyes:

Check out this sales pitch.:p
Daedal said:
Probably around 10mW... but considering how bright it seems compared to my last one, I wouldn't put it past it that it's 15mW or so. 8-)

--DDL
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Wolfman29 said:
Yeah - DTR, I noticed you cancelled the shipment of the second diode (I'm "Robin Blitz" - that's my mom's name :P ) and immediately sent another shipment or something?
Click to expand...

Yea I printed the shipping label with the wrong weight so I voided that label and printed another.:beer:
 
My 635 went Dimmmmmmmm mode at 946ma, I suggest 700ma
I knew it could or would happen, I didn't GAF
 
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