S T U/D1530P L
V
DD
t
on
V
IN
D
V
G S
R
GE N
G
90%
t
off
t
r
90%
R
L
V
OUT
t
d(on)
V
OUT
t
d(off)
90%
10%
t
f
10%
INVE R TE D
6
S
V
IN
50%
10%
50%
P ULS E WIDTH
F igure 11. S witching T es t C ircuit
F igure 12. S witching Waveforms
2
r(t),Normalized E ffective
T ransient T hermal Impedance
1
D=0.5
0.2
0.1
0.1
0.05
0.02
0.01
S ING LE P ULS E
0.01
10
-5
-4
-3
-2
-1
P
DM
t
1
1.
2.
3.
4.
10
10
10
t
2
R
θJ
A
(t)=r (t) * R
θJ
A
R
θJ
A
=S ee Datas heet
T
J M-
T
A
= P
DM
* R
θJ
A
(t)
Duty C ycle, D=t
1
/t
2
1
10
10
S quare Wave P uls e Duration (s ec)
F igure 13. Normalized T hermal T rans ient Impedance C urve
5