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Old 08-10-2012, 07:00 PM #1
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Default new 30V 2A DC Power Supply

I just got this little guy in today... Plugged it in... the fan does not engage. Does anyone know if the fan kicks on automatically on this unit?

DC power supply - YouTube
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new 30V 2A DC Power Supply-photo-1.jpg   new 30V 2A DC Power Supply-photo-2.jpg  



Last edited by viking; 08-10-2012 at 08:46 PM.
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Old 08-10-2012, 07:49 PM #2
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Default Re: new 30V 2A DC Power Supply

I have the same unit, the fan is always on when the unit is on.

For the YT video, only copy the numbers and letters of the video URL, not the whole URL. I tried to give an example but it didn't work so I edited it out.

Last edited by ARG; 08-10-2012 at 07:51 PM.
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Old 08-10-2012, 08:07 PM #3
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Default Re: new 30V 2A DC Power Supply

My one is very very similar... but different brand and mines the 5A version. Mine only cuts in when it gets hot...

Try dumping 2A through something for a few minutes and see if the fans cut in.
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Old 08-10-2012, 08:13 PM #4
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Default Re: new 30V 2A DC Power Supply

thanks!

Quote:
Originally Posted by ARGLaser View Post
I have the same unit, the fan is always on when the unit is on.

For the YT video, only copy the numbers and letters of the video URL, not the whole URL. I tried to give an example but it didn't work so I edited it out.
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Old 08-11-2012, 12:36 AM #5
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Default Re: new 30V 2A DC Power Supply

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Originally Posted by viking View Post
thanks!
No problem. I just got home though and mine is a different brand, I thought it was the same. I'm pretty sure all these units come from the same factory though.
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Old 08-13-2012, 05:22 PM #6
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Default Re: new 30V 2A DC Power Supply

I've got the 5A version and the fan activates at some preset heat sink temperature.

This brand is NOT okay for laser diodes. The regulation in current mode is crap:



(This is ~400mA through a standard 3-diode test load)
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Last edited by Cyparagon; 08-13-2012 at 05:23 PM.
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Old 08-13-2012, 05:24 PM #7
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Default Re: new 30V 2A DC Power Supply

Quote:
Originally Posted by Cyparagon View Post
I've got the 5A version and the fan activates at some preset heat sink temperature.

This brand is NOT okay for laser diodes. The regulation in current mode is crap:



(This is ~400mA through a standard 3-diode test load)
Looks like too much capacitance on the output, which is why it goes back down a little after it peaks slightly.
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Old 08-14-2012, 03:28 PM #8
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Default Re: new 30V 2A DC Power Supply

Interesting, when I was trying the benboost, going from 10uF to 22uF lowered that startup spike.
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