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BCW61D View Datasheet(PDF) - Motorola => Freescale

Part Name
Description
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BCW61D
Motorola
Motorola => Freescale Motorola
BCW61D Datasheet PDF : 8 Pages
1 2 3 4 5 6 7 8
BCW61BLT1 BCW61CLT1 BCW61DLT1
104
VCC = 30 V
103
102
ICEO
101
ICBO
AND
100
ICEX @ VBE(off) = 3.0 V
10–1
10–2
–4 –2
00
0 + 20 + 40 + 60 + 80 + 100 + 120 + 140 + 160
TJ, JUNCTION TEMPERATURE (°C)
Figure 15. Typical Collector Leakage Current
DESIGN NOTE: USE OF THERMAL RESPONSE DATA
A train of periodical power pulses can be represented by the model
as shown in Figure 15. Using the model and the device thermal
response the normalized effective transient thermal resistance of
Figure 14 was calculated for various duty cycles.
To find ZθJA(t), multiply the value obtained from Figure 14 by the
steady state value RθJA.
Example:
The MPS3905 is dissipating 2.0 watts peak under the following
conditions:
t1 = 1.0 ms, t2 = 5.0 ms (D = 0.2)
Using Figure 14 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 RθJA = 0.22 x 2.0 x 200 = 88°C.
For more information, see AN–569.
6
Motorola Small–Signal Transistors, FETs and Diodes Device Data
 

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