Which converter? 3.3Vf Cree with 3.7V Li-Ion battery

Lumbee1 said:

I am building a Cree bike light but I need some help with choosing which converter to use.

The P4 cree has a Vf of 3.3 to 3.9. The battery pack I would like to use is 3.7V Li-Ion. I know that I could run two Cree's for a higher total Vf and then choose a boost converter, but I would like to keep this as small as possible.

I already have a Fatman for another dual Cree bikelight.

Click to expand...

soffiler said:

How about this one?

http://theledguy.chainreactionweb.com/product_info.php?cPath=48_49_61&products_id=920

Click to expand...

Lumbee1 said:

...Output adjustable: Set by two SMT (0603) resistors.
Do you have any experience with the GD500 and how to set the current output?

Click to expand...