參數(shù)資料
型號: 2N5087RLRA
廠商: ON SEMICONDUCTOR
元件分類: 小信號晶體管
英文描述: 50 mA, 50 V, PNP, Si, SMALL SIGNAL TRANSISTOR, TO-92
封裝: CASE 29-11, TO-226, 3 PIN
文件頁數(shù): 6/7頁
文件大?。?/td> 151K
代理商: 2N5087RLRA
2N5087
http://onsemi.com
6
Figure 17. Thermal Response
t, TIME (ms)
1.0
0.01
r(t)
TRANSIENT
THERMAL
RESIST
ANCE
(NORMALIZED)
0.01
0.02
0.03
0.05
0.07
0.1
0.2
0.3
0.5
0.7
0.02
0.05
0.1
0.2
0.5
1.0
2.0
5.0
10
20
50
100 200
500 1.0k 2.0k
5.0k 10k 20k 50k 100k
D = 0.5
0.2
0.1
0.05
0.02
0.01
SINGLE PULSE
DUTY CYCLE, D = t1/t2
D CURVES APPLY FOR POWER
PULSE TRAIN SHOWN
READ TIME AT t1 (SEE AN569)
ZqJA(t) = r(t) w RqJA
TJ(pk) TA = P(pk) ZqJA(t)
t1
t2
P(pk)
FIGURE 19
Figure 18. ActiveRegion Safe Operating Area
TJ, JUNCTION TEMPERATURE (°C)
104
40
I C
,COLLECTOR
CURRENT
(nA)
Figure 19. Typical Collector Leakage Current
VCE, COLLECTOREMITTER VOLTAGE (VOLTS)
400
2.0
I C
,COLLECTOR
CURRENT
(mA)
DESIGN NOTE: USE OF THERMAL RESPONSE DATA
A train of periodical power pulses can be represented by
the model as shown in Figure 19. Using the model and the
device thermal response the normalized effective transient
thermal resistance of Figure 17 was calculated for various
duty cycles.
To find ZqJA(t), multiply the value obtained from Figure
17 by the steady state value RqJA.
Example:
The 2N5087 is dissipating 2.0 watts peak under the follow-
ing conditions:
t1 = 1.0 ms, t2 = 5.0 ms (D = 0.2)
Using Figure 17 at a pulse width of 1.0 ms and D = 0.2, the
reading of r(t) is 0.22.
The peak rise in junction temperature is therefore
DT = r(t) x P(pk) x RqJA = 0.22 x 2.0 x 200 = 88°C.
For more information, see ON Semiconductor Application
Note AN569/D, available from the Literature Distribution
Center or on our website at www.onsemi.com.
The safe operating area curves indicate ICVCE limits of
the transistor that must be observed for reliable operation.
Collector load lines for specific circuits must fall below the
limits indicated by the applicable curve.
The data of Figure 18 is based upon TJ(pk) = 150
°C; TC or
TA is variable depending upon conditions. Pulse curves are
valid for duty cycles to 10% provided TJ(pk)
≤ 150°C. TJ(pk)
may be calculated from the data in Figure 17. At high case
or ambient temperatures, thermal limitations will reduce the
power than can be handled to values less than the limitations
imposed by second breakdown.
102
101
100
101
102
103
20
0
+ 20 + 40 + 60 + 80 + 100 + 120 + 140 + 160
VCC = 30 V
ICEO
ICBO
AND
ICEX @ VBE(off) = 3.0 V
TA = 25°C
CURRENT LIMIT
THERMAL LIMIT
SECOND BREAKDOWN LIMIT
1.0 ms
10 ms
TC = 25°C
1.0 s
dc
4.0
6.0
10
20
40
60
100
200
4.0
6.0
8.0 10
20
40
TJ = 150°C
100 ms
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