With a lab power supply @ 48V it works fine, but any kind of lipo, with intergrated bms, or jus t flicking a switch to give the IC instantly 48V will keep the regulator in an limbo, giving out maybe 60% of the voltage it’s trying to regulate to.
Apologies for the delayed response.
To clarify, you put the resistor in series at the input and this problem no longer occurs?
Have you checked the inrush current?
@MPSNow_Yu I do have exactly the same problem with the MP9486A. I believe during startup it enters SCP mode and does not recover. Is there a solution to this problem?