MJ10020 データシートの表示（PDF） - Motorola => Freescale
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MJ10020
Motorola => Freescale
MJ10020 Datasheet PDF : 8 Pages
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MJ10020 MJ10021
The Safe Operating Area figures shown in Figures 13 and are
specified for these devices under the test conditions shown.
100
10 µs
100 µs
10
1 ms
dc
1.0
TC = 25°C
0.1
0.01
1.0
BONDING WIRE LIMIT
THERMAL LIMIT (SINGLE PULSE)
SECOND BREAKDOWN LIMIT
2.0 5.0 10 20 50 100 200 300
250
VCE, COLLECTOR–EMITTER VOLTAGE (VOLTS)
Figure 13. Maximum Forward Bias Safe
Operating Area
100
90
IC/IB ≥ 25
80
25°C ≤ TJ ≤ 100°C
70
60
50
40
30 TURN–OFF LOAD LINE
BOUNDARY FOR MJ10021
20 THE LOCUS FOR MJ10020
10 IS 50 V LESS
VBE(off) = 5 V
VBE(off) = 2 V
VBE(off) = 0 V
0 0 50 100 150 200 250 300
VCEM, COLLECTOR–EMITTER VOLTAGE (VOLTS)
Figure 14. Maximum RBSOA, Reverse Bias
Safe Operating Area
SAFE OPERATING AREA INFORMATION
FORWARD BIAS
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 dissipa-
tion than the curves indicate.
The data of Figure 13 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 der-
ate the same as thermal limitations. Allowable current at the
voltages shown on Figure 13 may be found at any case tem-
perature by using the appropriate curve on Figure 15.
TJ(pk) may be calculated from the data in Figure 12. At
high case temperatures, thermal limitations will reduce the
power that can be handled to values less than the limitations
imposed by second breakdown.
REVERSE BIAS
For Inductive loads, high voltage and high current must be
sustained simultaneously during turn–off, in most cases, with
the base to emitter junction reverse biased. Under these
conditions the collector voltage must be held to a safe level
at or below a specific value of collector current. This can be
accomplished by several means such as active clamping,
RC snubbing, load line shaping, etc. The safe level for these
devices is specified as Reverse Bias Safe Operating Area
and represents the voltage–current condition allowable dur-
ing reverse biased turn–off. This rating is verified under
clamped conditions so that the device is never subjected to
an avalanche mode. Figure 14 gives the RBSOA character-
istics.
100
80
60
40
20
0
0
SECOND BREAKDOWN
DERATING
THERMAL
DERATING
40
80
120
160
200
TC, CASE TEMPERATURE (°C)
Figure 15. Power Derating
6
Motorola Bipolar Power Transistor Device Data
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