BUD43D2 ON Semiconductor, BUD43D2 Datasheet - Page 9

• Manufacturer Part Number: BUD43D2
• Description: Bipolar Npn Transistor
• Manufacturer: ON Semiconductor

a transistor: average junction temperature and second
breakdown. Safe operating area curves indicate I
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 28 is
based on T
level. Second breakdown pulse limits are valid for duty
cycles to 10% but must be derated when T
Breakdown limitations do not derate the same as thermal
limitations. Allowable current at the voltages shown on
There are two limitations on the power handling ability of
2.5
1.5
0.5
2
1
0
0.01
0.1
200
1
Figure 29. Reverse Bias Safe Operating Area,
V
0.01
CE
C
0.05
0.02
0.01
0.5
0.2
0.1
SINGLE PULSE
300
= 25 C; T
, COLLECTOR–EMITTER VOLTAGE (VOLTS)
V
BE
400
= 0 V
J(pk)
Maximum Rating
500
is variable depending on power
0.1
V
BE(off)
600
= –1.5 V
T
Gain = 4
L
V
700
C
J
C
BE(off)
> 25 C. Second
= 125 C
= 500 mH
Figure 31. Thermal Response
= –5 V
800
C
http://onsemi.com
–V
1
900
BUD43D2
t, TIME (ms)
CE
9
Figure 28 may be found at any case temperature by using the
appropriate curve on Figure 30.
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 simultaneously during
turn–off with the base to emitter junction reverse biased. The
safe level is specified as reverse biased safe operating area
(Figure 29). This rating is verified under clamped conditions
so that the device is never subjected to an avalanche mode.
0.8
0.6
0.4
0.2
T
1
0
J(pk)
20
may be calculated from the data in Figure 31. At any
40
10
T
Figure 30. Power Derating
C
60
, CASE TEMPERATURE ( C)
80
R
R
D CURVES APPLY FOR POWER
PULSE TRAIN SHOWN
READ TIME AT t
Second Breakdown Derating
qJC(t)
qJC
= 55C/W MAX
100
= r(t) R
100
Thermal Derating
qJC
1
120
140
1000
160