2SK1859
Power vs. Temperature Derating
90
Channel Dissipation Pch (W)
50
30
Drain Current I
D
(A)
10
3
1
0.3
0.1
0.05
0
50
100
150
1
Maximum Safe Operation Area
60
30
PW
1
m
ion a is (on)
=
t
s
a
10
D
er are
DS
C
p s R
m
O hi y
O
s
pe
t b
(1
in ed
ra
Sh
it
tio
ot
n
lim
)
(T
c
=
25
°C
)
10
µ
s
0
10
µ
s
Ta = 25°C
3
10
30
100
300
1000
Case Temperature Tc (°C)
Drain to Source Voltage V
DS
(V)
Normalized Transient Thermal Impedance
γ
s (t)
Normalized Transient Thermal Impedance vs. Pulse Width
3
1
D=1
0.5
0.3
0.1
0.2
0.1
0.05
0.02
0.01
θch
– c(t) =
γ
s(t).
θ
ch – c
θ
ch – c = 2.08°C/W, Tc = 25°C
P
DM
0.03
0.01
10 µ
P
hot
1S
ulse
PW
T
PW
D = ——
T
1
10
100 µ
1m
10 m
100 m
Pulse Width PW (S)
3
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