Max Current/Voltage for 1 Watt 445nm

[gobucks]

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.

 

[anselm]

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

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

 

[gobucks]

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

 

[123splat]

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).

 

[gobucks]

I made my own so that doesn't apply, and I UTFSE for an hour....

 

[anselm]

Is the 4.5 Volts the voltage across the LD

Yes.This.
http://laserpointerforums.com/f65/3x-445nm-ld-piv-plot-53927.html

 

[Flaminpyro]

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...

 

[gobucks]

Thanks for the info

 

[Benm]

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.

 

[trawen]

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?

 

[djQUAN]

http://laserpointerforums.com/f65/list-445nm-diodes-51897-7.html#post778251

 

[Blaster]

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.