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power sequence question


only_lonely
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need to conduct DC margin test using Agilent MAINFRAME ( have +5V,+3.3V,+12V,-12V,Power GD,+24V modules).
then take out the power supply from my motherboard, connnect those modules to my board ,simulate the power supply condition.
But the staff told me to calculate or figure the time for those AC voltage....
power sequence for the board to make the board fully function.
But does the power sequence really important? it seems the interval time is only <20miliseconds..
Can i know whats the theory inside?

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