BUS98 Motorola Inc, BUS98 Datasheet - Page 6

• Manufacturer Part Number: BUS98
• Description: 30 AMPERES NPN SILICON POWER TRANSISTORS(SWITCHMODE SERIES)
• Manufacturer: Motorola Inc

BUS98 BUS98A
The Safe Operating Area figures shown in Figures 12 and 13 are
specified for these devices under the test conditions shown.
6
0.05
0.02
100
100
0.5
0.2
0.1
30
20
10
80
60
40
20
80
60
40
20
5
2
1
0
0
0
Figure 12. Forward Bias Safe Operating Area
Figure 13. Reverse Bias Safe Operating Area
T C = 25 C
V BE(off) = 5 V
T C = 100 C
I C /I B1 5
2
V CE , COLLECTOR–EMITTER VOLTAGE (VOLTS)
V CE , COLLECTOR–EMITTER VOLTAGE (VOLTS)
200
40
5
Figure 14. Power Derating
T C , CASE TEMPERATURE ( C)
BUS98
LIMIT
ONLY FOR
TURN ON
10
DERATING
400
THERMAL
80
20
DC
BUS98A
SECOND BREAKDOWN
50
600
120
t r = 0.7 s
BUS98A
BUS98
DERATING
100
200
1 ms
800
160
500
1000
1000
200
FORWARD BIAS
transistor: average junction temperature and second break-
down. Safe operating area curves indicate I C – V CE 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.
variable depending on power level. Second breakdown pulse
limits are valid for duty cycles to 10% but must be derated
when T C
ate the same as thermal limitations. Allowable current at the
voltages shown on Figure 12 may be found at any case tem-
perature by using the appropriate curve on Figure 14.
case temperatures, thermal limitations will reduce the power
that can be handled to values less than the limitations im-
posed by second breakdown.
REVERSE BIAS
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 conditions during re-
verse biased turn–off. This rating is verified under clamped
conditions so that the device is never subjected to an ava-
lanche mode. Figure 13 gives RBSOA characteristics.
There are two limitations on the power handling ability of a
The data of Figure 12 is based on T C = 25 _ C; T J(pk) is
T J(pk) may be calculated from the data in Figure 11. At high
For inductive loads, high voltage and high current must be
SAFE OPERATING AREA INFORMATION
Motorola Bipolar Power Transistor Device Data
w
25 _ C. Second breakdown limitations do not der-