FemtoBuck - How to prevent current output while arduino is resetting

Components & Accessories LEDs
1

Hi, I am working on a 12 channel LED lighting project using the FemtoBuck LED drivers.

Each channel is meant to limit current to a pre-set value, and we have a multitude of very expensive LEDs we do not wish to damage through incorrect use.

However, during the Arduino reboot, some of the channels go to full power output (330mA) for a few seconds. This is likely to kill our LEDs. is There any way to improve the function of these, so they dont switch to max power if PWM is interrupted, or is it going to require switching the power externally only after PWM is active?

2

Sounds like you are controlling a FemtoBuck via an arduino. When I did that for a project of mine, I believe I had a similar issue (LEDs briefly coming on during reboot). Looking at my schematic, it looks like I fixed that by connecting a 1k pull down resister to the FemtoBuck’s CTRL pin.