3 ms·
Is a higher switching frequency problematic, somehow? Is there an upper bound on switching frequency that makes LEDs difficult or unnecessarily inefficient or
by ssl-3 2y ago
Is a higher switching frequency problematic, somehow? Is there an upper bound on switching frequency that makes LEDs difficult or unnecessarily inefficient or something?
There's nothing I'm aware of relating to the electronics that drive them that would place such a low bound on frequency that the resulting pulses would be visibly distinct.
MOSFETs are generally good for > tens-of-KHz frequencies, and so are the hardware PWM channels in every-day MCUs.
- Zak 2y agoThe effect described in the StackExchange answer to increase perceived brightness at a lower power level seems to rely on a low frequency and short duty cycle. It's not necessary to use that effect given that LEDs rated for higher power levels are available, and the amount of power is insignificant at the scale of a car, but it does allow the use of cheaper LEDs.