Old 05-23-2009, 03:37 AM #1
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Default PHR-803t Diode Lifespan

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


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Old 05-23-2009, 04:12 AM #2
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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).
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Old 05-23-2009, 09:04 AM #3
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Cool 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...
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Old 05-23-2009, 02:18 PM #4
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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.
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Old 05-24-2009, 08:16 AM #5
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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 !
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Old 05-25-2009, 04:29 PM #6
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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
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Old 05-25-2009, 04:39 PM #7
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Quote:
Originally Posted by mauswiesel View Post
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.
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Old 05-25-2009, 07:41 PM #8
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I say 125mA max with acrylic lens.
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Old 05-26-2009, 09:15 PM #9
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Quote:
Originally Posted by mauswiesel View Post
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.
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Old 05-26-2009, 09:19 PM #10
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I think he decanned it himself...
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Old 05-27-2009, 08:10 PM #11
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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..
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Old 05-29-2009, 07:49 PM #12
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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?
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Old 06-01-2009, 04:34 PM #13
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^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.
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Old 06-02-2009, 02:52 PM #14
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Sounds good. You're using an AixiZ acrylic lens, right?
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Old 06-02-2009, 03:06 PM #15
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^Correct. The aixiz module is installed in a z-bolt heatsink as well, otherwise 100% duty would not be possible.
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Old 06-02-2009, 03:11 PM #16
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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.
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