We are using 9 clusters of 3 MP4689A drivers in parallel to drive “flashing” LEDS, 100ms pulses. Additionally we use PWM dimming with 20kHz frequency.
Doing this effects in poor EMC emmition performance. We tried to add a 1nF capacitor in parallel to the LED, which helped. Is there any other measures that could be taken?
Does anyone know about a MP driver suitable for driving the LEDs of each cluster (3 LEDs each) to reduce the number of drivers from 27 to 9?