Roff
Well-Known Member
I'm having second thoughts. I ran some simulations on a low-current LED and a high-current one, and got wildly different results.Yea please do... cheers
The key to fast turn-off is shunt switching, which will rapidly discharge the LED capacitance.
High-current LEDs have high capacitance, so turning them on rapidly may require some peaking in the drive waveform. Getting symmetrical turn-on and turn-off may be difficult for the high-current devices. I would need to see spice models of the LEDs you intend to try, and even then, the results of the simulation are only as accurate as the model.