BD243B データシートの表示（PDF） - Motorola => Freescale
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BD243B Datasheet PDF : 6 Pages
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BD243B BD243C BD244B BD244C
1.0
0.7 D = 0.5
0.5
0.3
0.2
0.2
0.1
0.1
0.05
0.07
0.02
0.05
0.03
SINGLE PULSE
0.02
0.01
0.01
0.01 0.02 0.03 0.05 0.1 0.2 0.3 0.5
P(pk)
t1
t2
SINGLE
PULSE
DUTY CYCLE, D = t1/t2
RθJC(max) = 1.92°C/W
D CURVES APPLY FOR POWER
PULSE TRAIN SHOWN
READ TIME AT t1
TJ(pk) – TC = P(pk) RθJC(t)
1.0 2.0 3.0 5.0 10
t, TIME OR PULSE WIDTH (ms)
20 30 50 100 200 300 500 1000
Figure 4. Thermal Response
10
5.0
0.5 ms
3.0
2.0
TJ = 150°C
1.0
SECOND BREAKDOWN LIMITED
BONDING WIRE LIMITED
0.5
THERMAL LIMITATION @ TC = 25°C
0.3 CURVES APPLY BELOW RATED VCEO
1.0
ms
5.0 ms
0.2
0.1
5.0
BD243B, BD244B
BD243C, BD244C
10 20
40
60 80 100
VCE, COLLECTOR–EMITTER VOLTAGE (VOLTS)
Figure 5. Active Region Safe Operating Area
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 5 is based on TJ(pk) = 150_C: TC is
variable depending on conditions. Second breakdown pulse
vlimits are valid for duty cycles to 10% provided TJ(pk)
150_C, TJ(pk) may be calculated from the data in Fig-
ure 4. At high case temperatures, thermal limitations will
reduce the power that can be handled to values less than the
limitations imposed by second breakdown.
5.0
3.0
2.0
1.0
0.7
0.5
0.3
0.2
0.1
0.07
0.05
0.06 0.1
TJ = 25°C
VCC = 30 V
ts
IC/IB = 10
IB1 = IB2
tf
0.2
0.4 0.6 1.0
2.0
IC, COLLECTOR CURRENT (AMP)
Figure 6. Turn-Off Time
4.0 6.0
300
TJ = 25°C
200
Cib
100
70
Cob
50
30
0.5
1.0
2.0 3.0 5.0
10
20 30 50
VR, REVERSE VOLTAGE (VOLTS)
Figure 7. Capacitance
Motorola Bipolar Power Transistor Device Data
3
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