Hello,
We are designing TPS54202DDCR from 24V to 5V application.
the schematic is as below, I found that there is a vibration noise in L1 inductor when the load current is over 400~500mA, but it is okay with less load current, about 100~150mA.
also I changed value of the passive components as below, the noise was same.
(i changed L1 to 22uH, it was same.)
in addition, I found some information in datasheet, about pulse skip mode (eco-mode) that activates under 300mA load current.
is there any relevance between vibration noise and pulse skip mode?
Or Should I change some values of my components to get rid of vibration noise?
Please review this schematics for solve this problem. Thanks.
Chase Jeong