Need a driver for a 975nm IR diode. Max Vf 2.5v, Max If 600ma

[Arcygenical]

This is a rare 975nm IR pump diode.
I don't want to destroy it.

The Vf is 2.5v (max)
the If is 700ma (max)

I'd love to drive it around ~500ma.

I'm thinking of limiting a stable meanwell 5v source to 2.5v using an adjustable voltage regulator, set physically to 2.5v

I'd like to take that 2.5v and feed it into a constant current driver.

Any idea of an ebay/aliexpress driver that can limit the output current to 400-600ma, while remaining stable with an input voltage of <3v?

Or should I forgo the Vreg stage, and just use a standard adjustable 980nm (3-5v) IR driver, and set it to around 500ma, and use a lower voltage supply, perhaps 2.5-3v.


FINAL QUESTION: how important is it that VCC matches Vf, even if the driver is current limiting? I've only ever used batteries and drivers to make lasers, never bench supplies, aha.

Thoughts?

 

[Arcygenical]

Oh, and this is the pump module.

https://imgur.com/bAsWK90

 

[Giannis_TDM]

You can build up an open source driver yourself: https://sites.google.com/view/giannislasershack/open-source-drivers
You will want the 3A buck. If you encounter any issues feel free to contact me!