Hi
I am using TPS64201 on my SPS with low load and I am hearing the audio frequency. The switching frequency is about 7-8khz, and the on-time is about 1.6usec. I read that TPS64201 will automatically reduce the on-time to as low as 200nsec to ensure that switching frequency will be higher than 50Khz, so that we won't hear the audible sound.
Separately, I've another board with different layout but same schematic. The switching freq is about 24khz and on-time is 400nsec. I couldn't hear the switching freq on this board.
Can someone help to advise me where I could be missing out.
Thanks and regards,
Samuel