PHR-803t Diode Lifespan

Bakawun · May 23, 2009

Does anyone know how long these diodes last (obviously depending on what the driver is at)? I am not sure whether or not to run mine at 100mA, 130mA, or somewhere in between.

Thanks, Baka

Mr_Lazo · May 23, 2009

If it helps at all, I've got 3 PHRs that've been running at 100-ish mA for more than 3 months. I had one mysteriously go out on me for a while, but after having it cranked up a bit (it was running around the 30mA range & it was tweaked to ~100) it started working fine again (and still going strong).

Flaminpyro · May 23, 2009

how much is enough

I have had one running at 100ma for a month on and off burning up all kinds of stuf, and one other at 100ma for a week and it's also running fine. sometimes I know I run them for more than two min at a time but usuly under one min.

peace Pyro... :tinfoil:

sportcoupe · May 23, 2009

As they say, your mileage will vary greatly. I have a PHR set at 167ma and it's still going strong a year later with light use.

Bakawun · May 24, 2009

Thanks for all the responses! I'll post pics when I've set the driver and finished the build. It's in the custom Maglite host that Jayrob and I have been working on. My greenie is also almost done

!

mauswiesel · May 25, 2009

i set my phr at 150 mA last year and still lasing. The key is the heatsinking.
I also set one phr at 200mA open can, and still lasing since 1 month

For a good longevity i would go to 140/150 mA no more with a jayrob lens

Deleted member 8382 · May 25, 2009

mauswiesel said:
i set my phr at 150 mA last year and still lasing. The key is the heatsinking.
I also set one phr at 200mA open can, and still lasing since 1 month

For a good longevity i would go to 140/150 mA no more with a jayrob lens

Thats really high lol. 120mW is considered safe I think I recommend 130mA.

FireMyLaser · May 25, 2009

I say 125mA max with acrylic lens.

Darkarmyofone · May 26, 2009

mauswiesel said:
i set my phr at 150 mA last year and still lasing. The key is the heatsinking.
I also set one phr at 200mA open can, and still lasing since 1 month

For a good longevity i would go to 140/150 mA no more with a jayrob lens

are you saying you have an open can PHR? didnt know those existed.

diachi · May 26, 2009

I think he decanned it himself...

ElektroFreak · May 27, 2009

I have a PHR at 90mA that I've had powered up continuously for just about 6 months. That equates to about 4320 hours. I started it 6 months ago for the purpose of determining lifespan. It is only one diode, and so it could be a freak, but a PHR should live a nice long life at 90mA..

Crossfire · May 29, 2009

ElektroFreak said:
I have a PHR at 90mA that I've had powered up continuously for just about 6 months. That equates to about 4320 hours. I started it 6 months ago for the purpose of determining lifespan. It is only one diode, and so it could be a freak, but a PHR should live a nice long life at 90mA..

That's good to know, I might want to build a PHR-based laser with no duty cycle. About how many mW is it putting out?

ElektroFreak · Jun 1, 2009

^about 80mW presently, but I haven't checked in a couple weeks. I hadn't seen any degradation as of the last time I checked and I don't anticipate any now.

Crossfire · Jun 2, 2009

Sounds good. You're using an AixiZ acrylic lens, right?

ElektroFreak · Jun 2, 2009

^Correct. The aixiz module is installed in a z-bolt heatsink as well, otherwise 100% duty would not be possible.

Crossfire · Jun 2, 2009

How big is the heatsink? I am planning a Jayrob Pocket Mini build for this, which does use heatsinking. Of course the laser wouldn't be on for 6 months at a time, either.

PHR-803t Diode Lifespan

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