2SJ408 L , 2SJ408 S
Normalized Transient Thermal Impedance vs. Pulse Width
3
Normalized Transient Thermal Impedance
γ
s (t)
Tc = 25°C
1
D=1
0.5
0.3
0.2
0.1
0.05
0.1
θ
ch – c(t) =
γ
s (t) •
θ
ch – c
θ
ch – c = 1.25 °C/W, Tc = 25 °C
PDM
PW
T
0.02
1
0.0
lse
pu
ot
h
1s
D=
0.03
PW
T
0.01
10 µ
100 µ
1m
10 m
Pulse Width
100 m
PW (S)
1
10
7
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