S TU/D1224N
VDD
on
t
toff
d(off)
t
r
t
d(on)
t
R L
f
t
V IN
90%
10%
90%
D
OUT
V
OUT
V
V
VG S
10%
INVE R TE D
R G E N
G
6
90%
50%
50%
S
IN
10%
P ULS E WIDTH
Figure 12. S witching Waveforms
Figure 11. S witching Test C ircuit
2
1
D=0.5
0.2
0.1
DM
P
0.1
0.05
1
t
2
t
0.02
1. R θJ A (t)=r (t) * R θJ A
2. R θJ A=S ee Datasheet
3. TJ M-TA = P DM* R θJ A (t)
4. Duty C ycle, D=t1/t2
0.01
S ING LE P ULS E
0.01
10-5
10-4
10-3
10-2
10-1
1
10
S quare Wave P ulse Duration (sec)
Figure 13. Normalized Thermal Transient Impedance C urve
5