Transient Thermal Impedance
2
1
0.1
0.01
0.01
0.1
1
10
100
1000
10000
P
DM
t
1
t
2
Square Wave Pulse Duration (msec)
Figure 13. Normalized Thermal Transient Impedance Curve
1. R
c
JA
(t)=r (t) * R
c
JA
2. R
c
JA
=See Datasheet
3. T
JM-
T
A
= P
DM
* R
c
JA
(t)
4. Duty Cycle, D=t1/t2
r(t),Normalized Effective
D=0.5
0.2
0.1
0.05
0.02
0.01
Single Pulse
V
DD
R
D
V
V
R
S
V
G
GS
IN
GEN
OUT
L
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