I need to drive my LEDs with a very low duty, typically 0,1%. With a PWM frequency of 1KHz (1000uS period) and a PWM input of 1uS positive, 999uS Gnd, the LEDs flicker, When I look at the signals, I see that LED output sometimes does not turn on. Even if there is a signal at the PWM input, LED output does not activate for that period. When duty is increased to 2%, there is no flickering. (PWM positive width: 20 uS) How can I drive my LED with 0,1% duty?
Please see image. CH1: PWM input with 1mS period, 1uS positive. CH2: LED output with cycles skipped.
