Can the LED itself have an impact on driver performance?

Flashlight Modding and DIY Parts
1

I was doing some stuff last night and was having some issues that appeared to be driver issues, but I wanted to ask - can the LED itself impact how the driver functions?

I’m wondering if very low Vf emitters can change the way a driver functions, say due to low Vf/high currents on new generation emitters.

I was using some Luminous SST-40 emitters for the first time last night and wondered if the driver was possibly acting up because of the new LED.

The driver in question is the BLF A6 driver.

This is not related to my other question in this sub-forum which is related to smoking BLF X6 drivers. (or at least I don’t think it is related, the A6 drivers aren’t overheating and smoking like the X6 drivers are)

2

i think it can
low voltage led maybe damage the constant current driver, because of the heat that the driver has to handle is high

3

The A6 is a FET+1 driver, so on low modes it is regulated (up to 350mA), but then it goes DD. Depending on the cell going DD on low Vf emitters like the SST-40 can push huge amounts of current. It likely won’t hurt the driver, but the emitter may give out. 8ish amps is about the limit for the SST-40s from what I have seen.