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Power module turn-on voltage?

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T

treez

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Page 7 of this power module datasheet gives two levels for input undervoltage turn-on….one is 24.5V, and the other is 42.3V…..the 42.3V level is called a “supervisory” level.
What is a “supervisory” level?.....and why is the input undervoltage turn on stated as being as low as 24.5V, when this module is not supposed to operate below 45Vin?
PRM48JH480T250A00 datasheet:
http://cdn.vicorpower.com/documents/datasheets/PRM48JH480T250A00-ds.pdf
 

thanks, i dont suppose you know what the other undervoltage turn-on of 24.5v refers to?.....it is touted as being a 45-55vin module, so i cant understand why ever it would turn on at 24.5v
 

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