Aixiz 200mw 660nm diode power limit?

[purevw]

I was just curious to know what people consider to be max , reasonably safe, current for the 660mn diode that Aixiz sells. The spec sheet states 240mw max constant current. I set the driver at 300 and can hold the un-sinked, copper module in my fingers for 30 seconds with only the slightest amount of heat produced.
I don't want to toast it, but I would like to get the most out of it. The module is copper and will be mounted in a copper heat sink. The driver is already sinked as it really does get warm fairly quickly without heat protection. The Aixiz kit number is AIX-445-KND if anyone wants to take a look.
If it is necessary info, I am using a 7.4V Li-ion 8.8 amp hour pack that is external to the host (I will be using the same battery pack for several different lasers). Each laser is equipped with a female DC connector for the power pack to plug in to.

 

[hakzaw1]

^^^ "The spec sheet states 240mw max constant current. I set the driver at 300 and can hold the un-sinked, copper module in my fingers for 30 seconds with only the slightest amount of heat produced. "

what is mw?? microwatt-- I think you mean 240mA --right?
The spec sheet was not written by AixiZ (yes thats how its spelled) that comes from the maker and running at more current is at your own risk...afaik.

Makers routinely put a current max that is below what most hobbiests may use-- they want the buyer to get a long lifespan-- Some members here will chime in on this. They may know something about failed ones ran higher than the recommended mAs. If you email AixiZ they will send you to me. So all I can tell you is that I do not have an answer other than what you have just read. I have no personal experience with this exact diode. And then there are freaks that seem impossible to kill. All of this is why diodes are almost never returnable. good luck
I like your idea about the external Power--hak

 

[purevw]

Oops, sorry for the typo. Yes I meant mA. I do understand that all this is experimentation as to how far a person can push these diodes and that doing so is at the person's own risk. I had hoped that I might hear from someone that has worked with many of these and has formed an opinion. I see many places where people state detailed power information concerning their M-140 diodes at 1.6, 1.8, or even 2 amps. Just thought I might get lucky. Thanks for the response.

 

[hakzaw1]

You are very welcome.. AixiZ would like to be more helpful but this is not easy.

They try to avoid giving any bad advice by sending you to a good all around source of help --like the forums. AixiZ has no way to determine how much you know already. And there is a LOT to know when building lasers.. good luck and feel free to PM me and I will try to steer you to info you need. The LPF index is a good place to start.

hak

 

[purevw]

The position of AixiZ is very easy to understand. The liability is not worth it. That is why I came here. I wouldn't ask AixiZ for advice beyond the spec sheet that the manufacturer gives. Maybe someone has burnt a couple of these and can recommend an upper limit. I might go to 320 mA and see what happens. As I said, at 300 I can hold the module in my fingers with almost no heat felt. At least this is a fairly cheap diode and I wouldn't be out that much if I push it to far. Thanks again.

 

[hakzaw1]

The position of AixiZ is very easy to understand. The liability is not worth it. That is why I came here. I wouldn't ask AixiZ for advice beyond the spec sheet that the manufacturer gives. Maybe someone has burnt a couple of these and can recommend an upper limit. I might go to 320 mA and see what happens. As I said, at 300 I can hold the module in my fingers with almost no heat felt. At least this is a fairly cheap diode and I wouldn't be out that much if I push it to far. Thanks again.

^^^^ good post!!

 

[Bionic-Badger]

If you have a meter and can plot the mW as a function of mA, usually the "sweet spot" is slightly below where the mW/mA loses its linearity. How long it can last at that location is debatable though.