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Can I use driver from 532nm for 445nm?

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dolftb

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I have an old host with 532 driver that was putting out 2.9 amps max. It has a pot that I could lower down the amps to say 1.8A max for a well heat sinked 445. Is it this easy or does a 532 driver work differently ?

For 60 bucks I would go from a dead greenie to a new blue...
 





lman

lman

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No, the pinout on a 445 is different then on on a 532nm which is IR.
 
AnthoT

AnthoT

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You cant do that because the green DPSS lasers use IR diodes and the blue 445nm diodes take 5V+ so that driver would not work you would need a different one :)

-Anthony
 
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mattco2

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Uhh yes it can a constant current driver supplies a constant amount of CURRENT however it will push as much voltage as needed to get over the diodes forward voltage
 
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dolftb

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So I guess I could just try it out with one 18650 and whatever happens happens. I suppose as long as i make sure the currnet initially is set low what could go wrong? If the board only outputs 2 volt and the M140 needs 5v and the driver doesnt boost the voltage than might be a dim beam/dot huh ?

Or do I need 2x 16430's ?

I would buy a 445 board but this driver I have fits into the host with on board switch and indicator leds for power on/ beam on/off. I am not trying to be cheap....
 
Cyparagon

Cyparagon

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It could work, provided you supply enough input voltage. The circuitry might not be able to handle the increased voltage input though. The green is already dead, so you have nothing to loose by putting it on a test load and trying it.
 
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mattco2

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its a standered linear driver you can get them from 7-11 dollars not that much to lose in this hobby
 
T

Things

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The green laser driver probably wont be able to handle the Vf of a 445nm diode. IR diodes are usually around 2V, which is fine for a driver with 3V input, but if you have a 445nm diode with a Vf of 4.5V, your input voltage would need to be higher, most likely blowing up the driver.

In short, no.
 
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mattco2

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well it rely depends on the chip used in the driver some can take the higher voltages while others cant but in the case of this cheapo driver its probably designed to run around 3 volts and high amperes
 
bloompyle

bloompyle

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Cyparagon said:
It could work, provided you supply enough input voltage. The circuitry might not be able to handle the increased voltage input though. The green is already dead, so you have nothing to loose by putting it on a test load and trying it.
Click to expand...

I agree, chances are it won't handle the load needed for a 405 or 445. It can barely handle more than 3V, so even with just one 4.2V battery it will probably blow.
 
Hiemal

Hiemal

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Actually, by giving it a diode with a higher forward voltage you're making the driver work a lot less in terms of heat output...

It doesn't have to drop as near as much voltage and thus a lot less heat is lost to the excess.

It doesn't hurt to give it a try with a testload, that's for sure!
 
T

Things

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Yes, but I don't think the chips are rated for the voltage, is the problem.
 
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dolftb

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Okay so I dont have the equipment for the test load, but I do had some info on the driver board. Obviously there is a voltage regulator onboard if only for the micro LED's on /off indicators.

There is also this Driver/opamp IC :Digi-Key - AD8052ARZ-ND (Manufacturer - AD8052ARZ)

Which seems to feed this MOSFET :IRLZ44NSPBF datasheet(1/10 Pages) IRF | HEXFET® Power MOSFET

Also there is a temp probe in order to reduce current in event of overheating, plus pot in order to change the current

Looking at these ICS and voltage they can handel would it be fair to say I could use one 18650 for the 445 and it should amp the voltage to whatever the Laser diode needs( boost) Wonder if it could be used as a buck driver as well seeing as it must already have a voltage reg for the LED indicators.

What do you all think after having more info ?

Thanks guys, and gals
 
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