2SJ246 L , 2SJ246 S
Normal Transient Thermal Impedance vs. Pulse Width
3
Normalized Transient Thermal Impedance
γ
s (t)
Tc = 25°C
1
D=1
0.5
0.2
0.1
0.05
0.02
1
0.0
0.3
0.1
θ
ch – c(t) =
γ
s (t) •
θ
ch – c
θ
ch – c = 6.25 °C/W, Tc = 25 °C
lse
Pu
t
P
DM
PW
T
D=
0.03
1s
ho
PW
T
0.01
10 µ
100 µ
1m
10 m
Pulse Width
100 m
PW (s)
1
10
Switching Time Test Circuit Waveform
Vin Monitor
D.U.T.
R
L
90%
Vin
–10 V 50Ω
V
DD
.
= –30 V
.
Vout
t d (on)
90%
10%
tr
t d (off)
90%
10%
t
f
Vout
Monitor
Vin
10%
7