TIP120, 121, 122, 125, 126, 127
Darlington Transistors
FIGURE - 6 ACTIVE REGION SAFE OPERATING AREA
There are two limitations on the power handling ability of a transistor:
average junction temperature and second breakdown safe operating
area curves indicate Ic-V
CE
limits of the transistor that must not be
subjected to greater dissipation than the curves indicate.
The data of Figure - 6 is based on T
J(PK)
= 150°C;T
c
is variable
depending on power level. Second breakdown pulse limits are valid for
duty cycles to 10% provided T
J
(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 - 7 DC CURRENT GAIN
FIGURE - 8 COLLECTOR SATURATION REGION
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