XP-G DD or driver?

[olrac]

I am starting a mod using 4 AA/NiMh in series with 3 XP-G R5's in series. Question is will this work as a DD set up if not any suggestions for a driver with this configuration?

Thanks

 

[lolzertank]

3 AA would be much safer since the Vf of the XP-G is so low. Even then you might want to put a resistor.

 

[olrac]

The XP-G's are Vf in the low 3's so three in series would be around 9 to 9.5.
4 AA's in series are reading around 7.7V.

 

[baterija]

I am starting a mod using 4 AA/NiMh in series with 3 XP-G R5's in series. Question is will this work as a DD set up if not any suggestions for a driver with this configuration?

In series? That would give you about 9V forward voltage required for 350 mA. In that case you need more voltage or a boost driver. If you meant parallel, like I assumed on first reading, Lolzer is on target.

 

[olrac]

In series? That would give you about 9V forward voltage required for 350 mA. In that case you need more voltage or a boost driver. If you meant parallel, like I assumed on first reading, Lolzer is on target.

Yeah i figured I probably would need a boost driver, looking for suggestions.

 

[baterija]

Here's Torchboy's driver database link. I selected only boost and sorted by number of LED's they can handle (got an error sorting on max so your candidates are at the bottom.)

Picking the drive level you want, modes, and size/space available probably narrow your choices down quite a bit.

 

[olrac]

Thanks baterija, that's exactly what I needed. :twothumbs :thanks: