We would like to know the horizontal axis of Figure-9.
Fig-10 to 13 were also missing those data.
The startup time from when EN first goes high to when the LEDs turn on is a fixed internal delay. It is not effected by the C_FILTER value.
If EN goes low for a long time (more than about 100ms), then the LEDs turn off. And if the LEDs turn off, then you will have the 60ms delay if EN goes high again. However, if EN goes low for just a short period of time (<30 ms), then the C_FILTER averages the EN pulses and dims the LEDS to a constant DC current.
Please let me know if you have any other questions.