Term Definition Glossary


ZθJL(t); ZθJC(t); ZθJA(t)
The change in the difference between the virtual junction temperature and the temperature of a specified reference point or region (lead, case, or ambient) at the end of a time interval divided by the step function change in power dissipation at the beginning of the same time interval that causes the change of temperature-difference.
NOTE: It is the thermal impedance of the junction under conditions of change and is generally given in the form of a curve as a function of the duration of an applied pulse.

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Terms and definitions extracted from current SPDC published documents
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