POWER BJT

Nasser Eskandarian Semnan university

Schematic ofConstruction

Turn On characteristics of a Power Transistor

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”

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