Reducing driver output current

[Seepeli]

Hello all!

I need a driver for 9 * Cree XP-G LEDs. The power source will be a 3 * li-ion battery.
My intention is to keep the budget low.
Driver, which I have been thinking, is S020165 from KD.
The problem is the output current, which is approximately 3A.
Is there a simple way to lower it to 1500 mA?

 

[uk_caver]

Typically there is a current sense resistor which can be changed to change the maximum output (and on a multi-level driver, changing it would change the lower output levels in proportion).

It's hard to tell from the KD pictures but I'd *guess* the sense resistor was somewhere on the upper board - usually it's connected between battery -ve and LED -ve.

On high current drivers (~>1A), the current sense resistor is often made up from multiple resistors in parallel (side-by-side and/or stacked on top of each other, and the sense resistor is low resistance, often giving a voltage drop of ~200-250mV at full current, so for a 3A output the total sense resistance would typically be something like 0.06-0.08 Ohm.

If the sense resistance was made up from an even number of equal resistors in parallel, removing half of them would drop the output from 3A to 1.5A.

 

[Seepeli]

Thank you for your advice!
I ordered the driver. Hopefully I can find the right resistors and I get the current reduced.