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參數(shù)資料
| 型號： | MJE18004D2 |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類： | 功率晶體管 |
| 英文描述： | 8-Bit Dual Supply Bidirectional Transceivers w/3-State Outputs |
| 中文描述： | 5 A, 450 V, NPN, Si, POWER TRANSISTOR, TO-220AB |
| 封裝： | CASE 221A-09, 3 PIN |
| 文件頁數(shù)： | 10/12頁 |
| 文件大?。?/td> | 466K |
| 代理商： | MJE18004D2 |
10
Motorola Bipolar Power Transistor Device Data
TYPICAL CHARACTERISTICS
P
Figure 30. Forward Bias Power Derating
There are two limitations on the power handling ability of
a transistor: average junction temperature and second
breakdown. 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 dissipation than the curves indicate. The data of
Figure 28 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 derate the
same as thermal limitations. Allowable current at the
voltages shown on Figure 28 may be found at any case
temperature by using the appropriate curve on Figure 30.
TJ(pk) may be calculated from the data in Figure 31. At
any 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 simulta-
neously during turn–off with the base–to–emitter junction
reverse biased. The safe level is specified as a 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.
TC, CASE TEMPERATURE (
°
C)
1.0
0.8
0.6
0.4
0.2
0
160
140
120
100
80
60
40
20
SECOND
BREAKDOWN
DERATING
THERMAL
DERATING
Figure 31. Typical Thermal Response (Z
θ
JC(t)) for MJE18004D2
TYPICAL THERMAL RESPONSE
1
0.01
10
0.1
0.01
t, TIME (ms)
0.1
1
100
1000
r
(
R
θ
JC(t) = r(t) R
θ
JC
R
θ
JC = 2.5
°
C/W MAX
D CURVES APPLY FOR POWER
PULSE TRAIN SHOWN
READ TIME AT t1
TJ(pk) – TC = P(pk) R
θ
JC(t)
P(pk)
t1
t2
DUTY CYCLE, D = t1/t2
0.05
SINGLE PULSE
0.5
0.2
0.1
0.02
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