MJE18008 Datasheet, PDF (5/10 Pages) Motorola, Inc – POWER TRANSISTOR 8.0 AMPERES 1000 VOLTS 45 and 125 WATTS

MJE18008 MJF18008
TYPICAL SWITCHING CHARACTERISTICS
(IB2 = IC/2 for all switching)
160
150
IB(off) = IC/2
VCC = 15 V
140
IC = 2 A VZ = 300 V
130
LC = 200 µH
120
110
100
90
IC = 4.5 A
80
70
60
TJ = 25°C
TJ = 125°C
3 4 5 6 7 8 9 10 11 12 13 14 15
hFE, FORCED GAIN
Figure 13. Inductive Fall Time
400
350
IC = 2 A
IB(off) = IC/2
VCC = 15 V
300
VZ = 300 V
LC = 200 µH
250
200
150
IC = 4.5 A
100
TJ = 25°C
50
TJ = 125°C
3 4 5 6 7 8 9 10 11 12 13 14 15
hFE, FORCED GAIN
Figure 14. Inductive Crossover Time
GUARANTEED SAFE OPERATING AREA INFORMATION
100
DC (MJE18008)
5 ms 1 ms
10
9
8
10 µs 1 µs
7
6
EXTENDED
SOA
5
1
4
TC ≤ 125°C
IC/IB ≥ 4
LC = 500 µH
DC (MJF18008)
0.1
0.01
10
100
1000
VCE, COLLECTOR–EMITTER VOLTAGE (VOLTS)
3
2
–5 V
1
0
VBE(off) = 0 V
–1, 5 V
0
200
400
600
800
1000
VCE, COLLECTOR–EMITTER VOLTAGE (VOLTS)
Figure 15. Forward Bias Safe Operating Area
Figure 16. Reverse Bias Switching Safe
Operating Area
1,0
SECOND BREAKDOWN
0,8
DERATING
0,6
0,4
THERMAL DERATING
0,2
0,0
20
40
60
80 100 120 140 160
TC, CASE TEMPERATURE (°C)
Figure 17. Forward Bias Power Derating
There are two limitations on the power handling ability of a
transistor: average junction temperature and second break-
down. 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 15 is based on TC
= 25°C; TJ(pk) is variable depending on power level. Second
breakdown pulse limits are valid for duty cycles to 10% but
must be derated when TC > 25°C. Second breakdown
limitations do not derate the same as thermal limitations.
Allowable current at the voltages shown in Figure 15 may be
found at any case temperature by using the appropriate curve
on Figure 17. TJ(pk) may be calculated from the data in Figure
20 and 21. At any case temperatures, thermal limitations will
reduce the power that can be handled to values less than the
limitations imposed by second breakdown. For inductive
loads, high voltage and current must be sustained simulta-
neously during turn–off with the base–to–emitter junction
reverse–biased. The safe level is specified as a reverse–
biased safe operating area (Figure 16). This rating is verified
under clamped conditions so that the device is never
subjected to an avalanche mode.
Motorola Bipolar Power Transistor Device Data
5