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Max Current/Voltage for 1 Watt 445nm

G

gobucks

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I recently bought the 1 watt 445nm LD from Modwerx and i was wondering what the current and voltage specs are that will give you the highest power output w/o damaging the LD. Any input appreciated.
 





A

anselm

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voltage: about 4.5V DC
current: somewhere between 1000mA and 1500mA.

It's all in the forum though if you had UTFSE.;)
 
G

gobucks

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Is the 4.5 Volts the voltage across the LD when connected or the open circuit voltage at the output of the driver?
 
123splat

123splat

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Like the man said, "It's all in the forum though if you had UTFSE."
If you are using a Boost driver, you do not ever, ever, want to apply power with the driver unloaded (output open circuit).
 
Flaminpyro

Flaminpyro

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You can see over 5.0 volts on the diode when it's at 700ma and above.
I would not push the diode higher than 1000-1400ma and only with the best heatsinking.
They are run at 700ma or so in there original use in projectors.

Peace All...
 
Benm

Benm

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Its always a trade off between power and diode life, so you need to pick conservative or performance at some point.

I'd say 1.0 amp is a good choice that will give you about 1 watt of power output, with good diode life as long as you provide proper heatsinking. Don't worry about the forward voltage, that should end up somewhere between 4 and 5 volts at that current. If its over 5 volts, you may had a bad diode.
 
T

trawen

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When you talk about term life, what time do you mean?
Dozens of hours and hundreds or more?

Why diodes are dying? There's something to burn out?
 
Blaster

Blaster

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Ive got a few 1.1 watt blue lasers and they draw just over a amp ,they don't get warm well the host doesn't. And the duty cycle is around 2 mins on 1 min off and had them for quite a while no issues if that helps at all .of course you only know you have and issue generally when it blows, by then too late.
 
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