Dummy load for NUBM44?

[ghostgeek]

I'm constructing a dummy load to set the current for an NUBM44. Wondering if 15SQ045 SCHOTTKY diodes are suitable?

I know they are overkill rated at 15A for a laser diode that needs to be set to a maximum of 4.5a, but they are readily available to me.

Just curious if the current rating on the dummy load diodes has an effect on anything.

Thanks for the insight.

 

[lasersbee]

I wouldn't be using Schottky Diodes...
The have a different voltage drop than
Rectifier Diodes.
As long as the diode Current rating is
above the required current use you
should be fine. I'd use 10 Amp diodes
with heatsinking.

BTW....
Would be appreciated if you introduce
yourself to the members in the Welcome
section.

It would also be helpful to members if
you included your Global location in your
Profile...


Jerry

 

[ghostgeek]

Thanks for the insight. How many rectifier diodes in series for the NUBM44?

I will update my account with my location, and go introduce myself in the new members forum. Thanks!

 

[Cyparagon]

Schottky diodes are fine, but you need about 3 per volt of drop, according to the datasheet. This makes them a more expensive option, but if you already have them lying around that's not an issue. The main drawback is you need ~12 diodes in series instead of ~4.

 

[hakzaw1]

TY OP for adding your location and the intro thread---welcome from Houston--+rep for you.