SLVAFI8 February 2023
This application note describes how to lower the EMI noise on local dimming LED driver circuit board. The process begins with the identification of the EMI noise source. By adding the snubber, external oscillator, and adjusting I/O voltage level can better the ECMI performance. Lastly, after doing all the countermeasures, please double check the signal waveform to meet the data sheet requirements.