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what is di/dt and dv/dt?

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Pommie

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di/dt is the rate of change of current and dv/dt is rate of change of voltage.

Mike.
 

crutschow

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di/dt is the rate of change of current and dv/dt is rate of change of voltage.

Mike.
With respect to time, of course. ;)

Those terms are not often used with respect to MOSFETs, IGBTs, or BJTs. dv/dt is of concern with SCRs or TRIACs since a value for that which is too high applied to the cathode-anode connection may cause inadvertent triggering of the device. They usually have a limit for that parameter listed in the data sheet.
 
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