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BCW61D View Datasheet(PDF) - Leshan Radio Company,Ltd

Part Name
Description
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BCW61D
LRC
Leshan Radio Company,Ltd LRC
BCW61D Datasheet PDF : 6 Pages
1 2 3 4 5 6
LESHAN RADIO COMPANY, LTD.
BCW61BLT1 BCW61CLT1 BCW61DLT1
104
V = 30 V
CC
103
102
101
100
I CEO
I CBO
AND
I CEX @ V BE(off) = 3.0 V
10–1
10–2
–4 –2
0 +20 +40 +60 +80 +100 +120 +140 +160
T J , 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 re-
sistance of Figure 14 was calculated for various duty cycles.
To find Z θJA(t) , multiply the value obtained from Figure 14 by
the steady state value R θJA .
Example:
The MPS3905 is dissipating 2.0 watts peak under the follow-
ing conditions:
t 1 = 1.0 ms, t 2 = 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 R θJA = 0.22 x 2.0 x 200 = 88°C.
For more information, see AN–569.
M10–6/6
 

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