BD787 Просмотр технического описания (PDF) - Motorola => Freescale
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BD787 Datasheet PDF : 6 Pages
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1.0
0.7 D = 0.5
0.5
0.3
0.2
0.2
0.1
0.05
0.1
0.07
0.05
0.02
0.03
0.01
0.02
0 (SINGLE PULSE)
0.01
0.02
0.05
0.1
0.2
BD787 BD788
P(pk)
t1
t2
DUTY CYCLE, D = t1/t2
RθJC(t) = r(t) RθJC
RθJC = 8.34°C/W MAX
D CURVES APPLY FOR POWER
PULSE TRAIN SHOWN
READ TIME AT t1
TJ(pk) – TC = P(pk) RθJC(t)
0.5
1.0
2.0
5.0
10
20
t, TIME (ms)
50
100
200
Figure 4. Thermal Response
10
1.0 ms
5.0
2.0
5.0 ms
100 µs
500 µs
1.0
TJ = 150°C
dc
0.5
BONDING WIRE LIMITED
THERMALLY LIMITED @ TC = 25°C
0.1
(SINGLE PULSE)
0.05
SECOND BREAKDOWN LIMITED
CURVES APPLY BELOW RATED VCEO
0.02
BD787 (NPN) BD788 (PNP)
0.01
1.0
2.0 3.0 5.0 7.0 10
20 30
60 V
50 70 100
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 re-
duce the power that can be handled to values less than the
limitations imposed by second breakdown.
2000
1000
ts
700
500
300
200
VCC = 30 V
IC/IB = 10
IB1 = IB2
TJ = 25°C
100
tf
70
50
(NPN)
30
(PNP)
20
0.04 0.06 0.1
0.2
0.4 0.6 1.0
2.0 4.0
IC, COLLECTOR CURRENT (AMP)
Figure 6. Turn–Off Time
200
100
70
50
30
20
10
1.0
TJ = 25°C
Cib
Cob
(NPN)
(PNP)
2.0 3.0 5.0 7.0 10
20 30
VR, REVERSE VOLTAGE (VOLTS)
Figure 7. Capacitance
50 70 100
Motorola Bipolar Power Transistor Device Data
3
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