2SK1668
Power vs. Temperature Derating
40
Maximum Safe Operation Area
50
30
10
µ
s
Pch (W)
10
0
30
10
Drain Current I
D
(A)
D
C
O
PW
µ
s
1
=
10
m
s
Channel Dissipation
3
20
1.0
10
0.3
m
pe
s
(1
ra
tio
sh
n
ot
(T
)
c
=
25
°C
)
Operation in this area
is limited by R
DS
(on)
Ta = 25°C
0.1
0
50
100
Case Temperature
150
Tc (°C)
200
0.05
1
3
10
30
100
300
1000
Drain to Source Voltage V
DS
(V)
Normalized Transient Thermal Impedance vs. Pulse Width
Normalized Transient Thermal Impedance
γ
s (t)
3
Tc = 25°C
1.0
D=1
0.5
0.3
0.2
0.1
θ
ch – c(t) =
γ
s(t) .
θ
ch – c
θ
ch – c = 4.17°C / W, Tc = 25°C
PW
D= T
P
DM
T
1m
10 m
Pulse Width PW (S)
100 m
PW
0.1
0.05
0.02
ulse
ot P
1 sh
0.03
0.01
0.01
10
µ
100
µ
1
10
3
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