power bjt - semnan.ac.ireskandarian.semnan.ac.ir/uploads/power bjt.pdf · 2012. 10. 21. · title:...
TRANSCRIPT
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POWER BJT
Nasser Eskandarian Semnan university
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Schematic ofConstruction
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Turn On characteristics of a Power Transistor
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tri is called the current risetime of the transistor.
delay time (td ON)
At the end of this rapid fall
(tfv1) the transistor enters“quasi saturation region”.
At the end of this slow fall (tfv2)the transistor enters “hardsaturation”
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time interval “trv1”
i i l “t ”“ts” called thestorage time of thetransistor
fall time tfi
time interval trv2
Turn Off Characteristics of a Power Transistor