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Old 04-21-2011, 05:06 AM #1
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Default Voltage overhead for 2 x 445 in series

I just realized my 445s may be underpowered..I don't know.

Basically, 2 A140s are in series, connected to a Flexmod P3, running at 1.4A 18V(regulated).
They outputing about 890mW each. Shouldn't they be closer to 1200mW. Is the voltage too low to carry this current taking into account the driver also requires voltage.


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Old 04-22-2011, 06:00 PM #2
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Default Re: Voltage overhead for 2 x 445 in series

blrock;

18 VDC should be plenty of voltage to power your series diodes.

You could be getting some voltage drop in your wiring.

Check the voltage at each diode while operating.

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Old 04-23-2011, 08:24 AM #3
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Default Re: Voltage overhead for 2 x 445 in series

Quote:
Originally Posted by LarryDFW View Post
blrock;

18 VDC should be plenty of voltage to power your series diodes.

You could be getting some voltage drop in your wiring.

Check the voltage at each diode while operating.

LarryDFW
Good point....I am using a thin gauge wire. Perhaps I need a thicker wire
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Old 04-24-2011, 07:22 PM #4
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Default Re: Voltage overhead for 2 x 445 in series

I just remeasured the amps today. The current is set too 1.65A. Both lasers giving +- 1800mW total. Running the laser as a single unit at this current gives 1300mW.

Wiring looks ok. Should I de-solder with wiring from the diodes and replace it with thicker guage?
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1657mW 532nm Lab
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1183mW 650nm
1800mW Watt 445nm (2x900mW through PBS)
510mW 532nm
500mw 635nm (DEAD Apr 2011)
259mw 660nm
2 Watt 808nm
205mw 404nm
YAG 2J Pulse (Still need a PSU)
Countless laser diodes.
Lots of 5-10mw green lasers
3mw He-Ne (My first laser. 1995)
20 high power c-mounts
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Old 04-25-2011, 07:11 PM #5
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Default Re: Voltage overhead for 2 x 445 in series

Can't hurt to use beefier wires.
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