We observe sudden changes and flickering especially at low position luminosity.
attached oscilloscopecapture_1 is taken at one of the green LED channels. During the dimming cycle, the ghost pattern causes momentary flashes in LED brightness.
again oscilloscopecapture_2.PNG and oscilloscopecapture_3.PNG are taken at one of the green channels. In this case, the LOW side resistor of the output driver value decreased; and noticed a noise at the ON state. There’s also a flicker in this case and we suppose the cause is the noise seen in oscilloscopecapture_3.PNG.
The flickering and flashing are substantially seen at low luminosity values.
Do you have any suggestions on fixing these?
our design is
LED7708 has 10 channels active, and 8 LEDs on each channel. There are 4 LED7708s on the same board.
LED PN osram LRTB GVTG