Dears,
My design as below, I have meet a strange phenomenon on the circuit, a capacitor is welded on the EN pin, and some circuit board can normal working, but another board can't do it.
The error state like this, the input is 32V, and the Vout is set to 12V(about 1A), if the circuit isn't normal working ,the Vout is slowly rasing from 5V to 12V or more high voltage, once I remove the C1, the Vout can quickly reach to 12V and stabilize. By the way, some circuit no remove the C1 , the circuit is can working, So I don't konw why occur this case? Could you give me some suggestions? Thanks a lot!
And then, what's means of the figure16? If the Vfb is not a fix voltage? If like this that the light load case, the load can't reach my set output voltage.
Best Regards,
jacking
