Hi,
We are currently working on developing power regulation module for 9V output.
In datasheet, it only shows the feedback resistor setting as 0.6*(1+R6/R7).
To get more detail about input inductor value at 9V condition, we used Webench simulation.
So, we figured out 5.6uH and 30uF (10uF * 3) settings for output Inductor and capacitor setting.
After PCB manufacturing, 2 of 5 board was burned out (more like explosion...) after applying 24V power using battery (max 25.2V).
I followed several details about PCB guide lines, and add additional Common mode filter on 24V-Input and 9V-Output for noise reduction.
So, I just wonder which point of circuit could cause such kind of problem..
I would like to upload shcematics and layout, but impossible in chrome.
If anybody want, I can send it through e-mail.
