Old 01-15-2014, 04:05 AM #1
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Unhappy X-drive current jump

I searched around and could find anything like this, so I'll throw this out there.

I recently started a new 9mm 445nm diode build. I took the 1.8A fixed x-drive from my Trustfire A8 build and put it in a skyray with a new diode. It was working fine, till the third time I fired it up. It came on for about a second, then out.

So I took out the driver and put it on a variable test load. Set to 5 diodes, reading ~6.4V drop, I got a reading of 2.6A. When I dropped down to 4 diodes, I got 2.8 to 3.+A, very unstable.

This driver was fine in the first laser. I was getting a stable laser output of 2.29W. After transplanting, it worked briefly, then apparently went AWOL and likely killed my diode.

So, has something similar happened to anyone else? Or have any idea what could have happened?

I hate to think that I did something when resoldering that reset the current. Any thoughts are appreciated.


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405nm SkyRay 12X S06J w/450mA microboost - 485mW :|: BDR-209 16X w/700mA microboost 2X in ZeroLasers SkyRay and Chunk hosts
445nm ZeroLaser 2x18650 host 9mm w/2.3A X-drive - 2.8W :|: Trustfire A8 9mm w/2.4A X-drive - "The Sentinel" ~3W
445nm JetLasers PL-E - ~1.25W (1.32W) :|: 445nm 9mm w/2.4A X-drive Kryton "the Terminator" :|: Blord 501B build - 2.1W
450nm Osram PLTB450 in SL S4 host - 1.48W :|: 450nm Osram PL450B with ~280mA microboost in C6 host - 235mWBuild here
462nm 9mm diode in ZeroLasers chunk w/1.8A X-drive :|: M462 in sinner Cypreus-II w/microboost
473nm CNI lab 40mW
520nm NDG700 @1.8A in Cypreus-IIb - 1.04W :|: PL520 w/300mA x-boost in S4 host - 102mW Build here
532nm JetLasers Ti-B - 100mW (151mW)
589nm Dragonlasers Spartan 50mW
638nm Mits in SL C6 host custom build - 677mW :|: Opnext single mode 290mA x-drive in SL Steel C6 host w/ext. copper HS - 230mW
650nm copper module in C6 host - ~300mW (230mW) Build here
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Old 01-15-2014, 06:52 AM #2
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Default Re: X-drive current jump

only time I have seen that is with the bridged contacts on the board. Can you take a picture of the board?
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Old 01-15-2014, 10:00 PM #3
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Default Re: X-drive current jump

Here are a couple of pics.





I took these quick, so if their not good enough I can get better ones.
Attached Thumbnails
X-drive current jump-img_20140115_165131.jpg   X-drive current jump-img_20140115_171401.jpg  
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405nm SkyLaser PL 300-500 - ~500mW (523mW);| SkyLaser LP 5-80 - 5mW
405nm SkyRay 12X S06J w/450mA microboost - 485mW :|: BDR-209 16X w/700mA microboost 2X in ZeroLasers SkyRay and Chunk hosts
445nm ZeroLaser 2x18650 host 9mm w/2.3A X-drive - 2.8W :|: Trustfire A8 9mm w/2.4A X-drive - "The Sentinel" ~3W
445nm JetLasers PL-E - ~1.25W (1.32W) :|: 445nm 9mm w/2.4A X-drive Kryton "the Terminator" :|: Blord 501B build - 2.1W
450nm Osram PLTB450 in SL S4 host - 1.48W :|: 450nm Osram PL450B with ~280mA microboost in C6 host - 235mWBuild here
462nm 9mm diode in ZeroLasers chunk w/1.8A X-drive :|: M462 in sinner Cypreus-II w/microboost
473nm CNI lab 40mW
520nm NDG700 @1.8A in Cypreus-IIb - 1.04W :|: PL520 w/300mA x-boost in S4 host - 102mW Build here
532nm JetLasers Ti-B - 100mW (151mW)
589nm Dragonlasers Spartan 50mW
638nm Mits in SL C6 host custom build - 677mW :|: Opnext single mode 290mA x-drive in SL Steel C6 host w/ext. copper HS - 230mW
650nm copper module in C6 host - ~300mW (230mW) Build here
650nm module in custom host - ~300mW (224mW) "LiL Red Eye" Build Here

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Last edited by ChaosLord; 01-15-2014 at 10:20 PM.
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Old 01-16-2014, 03:47 PM #4
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Default Re: X-drive current jump

How about the other side?
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Old 01-16-2014, 10:16 PM #5
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Default Re: X-drive current jump

I was afraid you might ask that..

I use this sugru hacking putty to insulate solder joints, and its a pain to remove. I did manage to get it pretty clean and took these:







The orange bits are the putty. I did have one side of the inductor, I think, covered with it. Not sure if that would have an effect, as it never got very warm.
Attached Thumbnails
X-drive current jump-img_20140116_17024900.jpg   X-drive current jump-img_20140116_17033511.jpg   X-drive current jump-img_20140116_17041022.jpg  
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405nm SkyLaser PL 300-500 - ~500mW (523mW);| SkyLaser LP 5-80 - 5mW
405nm SkyRay 12X S06J w/450mA microboost - 485mW :|: BDR-209 16X w/700mA microboost 2X in ZeroLasers SkyRay and Chunk hosts
445nm ZeroLaser 2x18650 host 9mm w/2.3A X-drive - 2.8W :|: Trustfire A8 9mm w/2.4A X-drive - "The Sentinel" ~3W
445nm JetLasers PL-E - ~1.25W (1.32W) :|: 445nm 9mm w/2.4A X-drive Kryton "the Terminator" :|: Blord 501B build - 2.1W
450nm Osram PLTB450 in SL S4 host - 1.48W :|: 450nm Osram PL450B with ~280mA microboost in C6 host - 235mWBuild here
462nm 9mm diode in ZeroLasers chunk w/1.8A X-drive :|: M462 in sinner Cypreus-II w/microboost
473nm CNI lab 40mW
520nm NDG700 @1.8A in Cypreus-IIb - 1.04W :|: PL520 w/300mA x-boost in S4 host - 102mW Build here
532nm JetLasers Ti-B - 100mW (151mW)
589nm Dragonlasers Spartan 50mW
638nm Mits in SL C6 host custom build - 677mW :|: Opnext single mode 290mA x-drive in SL Steel C6 host w/ext. copper HS - 230mW
650nm copper module in C6 host - ~300mW (230mW) Build here
650nm module in custom host - ~300mW (224mW) "LiL Red Eye" Build Here

Radiant X4 3.7W LPM
Nospin 5W LPM
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