Driver for Senkat 808nm diodes

[robjdixon]

i want to run one of senkat's 808 diodes at around 250mA. Is there any driver that can do this with 1 CR123

 

[ben74]

If you have a die greenie you could use the driver out of that if it has a pot or it set at 250mA.

 

[pocketfluff]

I'm doing so with a lm3410 at about 80% efficiency.

 

[rkcstr]

I'm guessing the Lavadrive can't drive down to 2V?

If you need something now, I would think his 'Groove' driver should be able to do that (1V dropout plus 2V for the diode, equals 3V input).

I'm also working on a driver based on a similar circuit that should theoretically do the same thing but still retain the small size of my driver, but I'm not sure when that will be ready  :-/

 

[Midknight]

Wouldn't the Flex Driver work?

 

[jamilm9]

the flex driver will break if it has to give less then 2.4 volts.

 

[ben74]

Break! wont it just shut down :-?

 

[666DAN]

Just run a diode in series with the output, will bump the voltage required up.

 

[LRMNmeyer]

Just run a diode in series with the output, will bump the voltage required up.

That only increases the maximum voltage input.

 

[GooeyGus]

[quote author=666DAN link=1219927292/0#7 date=1221273148]Just run a diode in series with the output, will bump the voltage required up.

That only increases the maximum voltage input.[/quote]

He's not talking about the input (battery) side, he's talking about putting the diode in series with the laser diode on the output side, which should increase the required voltage to a level safe for the driver.