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參數(shù)資料
| 型號： | MPS6521RLRA |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類： | 功率晶體管 |
| 英文描述： | Amplifier Transistors |
| 中文描述： | 100 mA, 25 V, NPN, Si, SMALL SIGNAL TRANSISTOR, TO-92 |
| 封裝： | CASE 29-11, TO-226, 3 PIN |
| 文件頁數(shù)： | 10/11頁 |
| 文件大?。?/td> | 174K |
| 代理商： | MPS6521RLRA |
MPS6521 (NPN) MPS6523 (PNP)
http://onsemi.com
10
PNP
MPS6523
Figure 39. Thermal Response
t, TIME (ms)
1.0
0.7
0.01
r
(
0.01
0.02
0.03
0.05
0.07
0.1
0.2
0.3
0.5
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 = t
/t
D CURVES APPLY FOR POWER
PULSE TRAIN SHOWN
READ TIME AT t
1
(SEE AN569)
Z
JA(t)
= r(t) w R
JA
T
J(pk)
T
A
= P
(pk)
Z
JA(t)
t
1
t
2
P
(pk)
FIGURE 40
Figure 41.
T
J
, JUNCTION TEMPERATURE (
°
C)
10
4
4
0
I
Figure 42.
V
CE
, COLLECTOREMITTER VOLTAGE (VOLTS)
400
2.0
I
DESIGN NOTE: USE OF THERMAL RESPONSE DATA
A train of periodical power pulses can be
represented by the model as shown in Figure 40. Using
the model and the device thermal response the
normalized effective transient thermal resistance of
Figure 39 was calculated for various duty cycles.
To find Z
JA(t)
, multiply the value obtained from
Figure 39 by the steady state value R
JA
.
Example:
The MPS6523 is dissipating 2.0 watts peak under the
following conditions:
t
1
= 1.0 ms, t
2
= 5.0 ms. (D = 0.2)
Using Figure 39 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
T = r(t) x P
(pk)
x R
JA
= 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 I
C
V
CE
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 42 is based upon T
J(pk)
= 150
°
C;
T
C
or T
A
is variable depending upon conditions. Pulse
curves are valid for duty cycles to 10% provided T
J(pk)
≤
150
°
C. T
J(pk)
may be calculated from the data in
Figure 39. At high case or ambient temperatures,
thermal limitations will reduce the power that can be
handled to values less than the limitations imposed by
second breakdown.
10
2
10
1
10
0
10
1
10
2
10
3
2
0
0
+20
+40
+60
+80 +100 +120 +140 +160
V
CC
= 30 Vdc
I
CEO
I
CBO
AND
I
CEX
@ V
BE(off)
= 3.0 Vdc
T
A
= 25
°
C
CURRENT LIMIT
THERMAL LIMIT
SECOND BREAKDOWN LIMIT
1.0 ms
10 s
T
C
= 25
°
C
1.0 s
dc
dc
4.0
6.0
10
20
40
60
100
200
4.0
6.0
8.0
10
20
40
T
J
= 150
°
C
100 s
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