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TPS2121EVM-023: TPS2121 use Problem?

Part Number: TPS2121EVM-023
Other Parts Discussed in Thread: TPS2121

Tool/software:

1、Testing TPS2121 EVM, it is found that the output delay is larger from the high-voltage power supply to the low-voltage power supply,This is far from the specification,What could be the possible cause?

2、What signals need to be tested?

3、Can the voltage switching time meet the datesheet?

4、The switchover time test is performed at the ms level. Is the fault caused by demo or demo configuration?