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TPS2490 - oscillation problem during startup shorted to the source of NMOS

Other Parts Discussed in Thread: TPS2490

Dear All,

We use the evaluation board Hot Swap EVM Main Board for our tests.
We find an oscillation problem when starting with the output of TPS2490 Source of NMOS shorted. During a short-circuit on the operational system of the short-circuit detection is correctly and pass TPS2490 Off without oscillation. Do you have an explanation with respect to this problem?
Power to 22.5 with 26.5VDC 2.5A and 0.8A Start stable system operation.

Image with correct situation about the TPS2490, short circuit