Hi team,
My customer recently using LP8861-Q1 as LED backlight driver in a infotainment project.
And they recently tested some ripple, which Vpp=200mV, in the power source of 13V5_PERM, which has the same frequency of PWM control signal of TFT_BL_PWM. Have you ever meet this issue before? And any advices to improve it?
Below is the PCB layout and ripple waveform.
