4 / 6 page
TIP29, 30
High Power Bipolar Transistor
Page 4
31/05/05 V1.0
There are two limitations on the power handling ability of a transistor:
average junction temperature and second breakdown safe operating area
curves indicate IC-VCE limits of the transistor that must be observed for
reliable operation i.e., the transistor must not be subjected to greater
dissipation than the curves indicate.
The data of Figure - 6 curve is based on TJ(PK) = 150°C; TC is variable
depending on power level. Second breakdown pulse limits are valid for duty
cycles to 10% provided TJ(PK) ≤150°C. At high case temperatures, thermal
limitation will reduce the power that can be handled to values less than the
limitations imposed by second breakdown.
Figure - 2 Turn-On Time
Figure - 3 Switching Time Equivalent Circuit
Figure - 4 DC Current Gain
Figure - 5 Turn-Off Time
Figure - 6 Active Region Safe Operating Area
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