2SK1809
Power vs. Temperature Derating
90
Channel Dissipation Pch (W)
Maximum Safe Operation Area
50
30
10
Drain Current I
D
(A)
10
PW
=
µ
s
10
0
µ
s
60
1
3
1
0.3
0.1
0.05
D
C
O
s
m
10
m
Operation in this
area is limited
by R
DS
(on)
pe
ra
tio
s
(1
ot
Sh
30
)
n
(T
c
=
25
Ta = 25°C
1
3
10
30
100
°C
)
0
50
100
150
300
1000
Case Temperature Tc (°C)
Drain to Source Voltage V
DS
(V)
Normalized Transient Thermal Impedance vs. Pulse Width
Normalized Transient Thermal Impedance
γ
s (t)
3
D=1
0.5
0.3
0.2
0.1
0.1
0.05
0.02
0.03
0.01
10
µ
0.01
1 shot Pulse
100
µ
1m
10 m
Pulse Width PW (S)
100 m
θ
ch – c(t) =
γ
s(t) .
θ
ch – c
θ
ch – c = 2.08°C / W, Tc = 25°C
PW
D= T
P
DM
T
PW
Tc = 25°C
1.0
1
10
3
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