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参数资料
| 型号： | 2N6438 |
| 厂商： | MOTOROLA INC |
| 元件分类： | 功率晶体管 |
| 英文描述： | 25 A, 120 V, PNP, Si, POWER TRANSISTOR, TO-204AA |
| 封装： | TO-3, 2 PIN |
| 文件页数： | 3/6页 |
| 文件大小： | 131K |
| 代理商： | 2N6438 |
2N6437 2N6438
3
Motorola Bipolar Power Transistor Device Data
Figure 4. Thermal Response
t, TIME OR PULSE WIDTH (ms)
1.0
0.01
0.7
0.5
0.3
0.2
0.1
0.07
0.05
0.03
0.02
0.02 0.03
r(t)
EFFECTIVE
TRANSIENT
THERMAL
RESIST
ANCE
(NORMALIZED)
0.05
0.1
0.2
0.5
1.0
2.0
5.0
10
20
50
100
200
1000
500
D = 0.5
SINGLE PULSE
0.2
0.05
0.1
0.02
0.01
0.3
3.0
30
300
Z
θJC(t) = r(t)RθJC
R
θJC = 0.875°C/W MAX
D CURVES APPLY FOR POWER
PULSE TRAIN SHOWN
READ TIME AT t1
TJ(pk) – TC = P(pk) Z
θJC(t)
P(pk)
t1
t2
DUTY CYCLE, D = t1/t2
100
2.0
Figure 5. Active Region Safe Operating Area
50
5.0
0.01
10
20
70
200
TJ = 200°C
0.1
10
0.5
I C
,COLLECT
OR
CURRENT
(AMP)
VCE, COLLECTOR-EMITTER VOLTAGE (VOLTS)
20
0.2
50
100
200
s
dc
2.0
0.02
0.05
1.0
3.0
5.0
30
7.0
BONDING WIRE LIMITED
THERMALLY LIMITED
TC = 25°C (SINGLE PULSE)
PULSE DUTY CYCLE
v 10%
SECOND BREAKDOWN LIMITED
CURVES APPLY
BELOW RATED VCEO
5.0 ms
1.0 ms
2N6437
2N6438
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) = 200_C; TC is
variable depending on conditions. Second breakdown pulse
limits are valid for duty cycles to 10% provided TJ(pk)
v 200_C. TJ(pk) may be calculated from the data in Figure 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.
3.0
0.3
Figure 6. Turn-Off Time
IC, COLLECTOR CURRENT (AMP)
t,TIME
(
s)
0.7
0.5
0.2
0.1
0.03
0.7 1.0
2.0
5.0
10
30
VCC = 80 V
IB1 = IB2
IC/IB = 10
TJ = 25°C
ts
3.0
0.3
1.0
0.07
0.05
7.0
20
tf
2.0
0.5
0.1
Figure 7. Capacitance
VR, REVERSE VOLTAGE (VOLTS)
0.5
1.0
2.0
5.0
20
50
100
10
CAP
ACIT
ANCE
(pF)
1000
700
300
200
TJ = 25°C
Cib
Cob
4000
2000
500
0.2
3000
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