Datasheet

FDMS8090 PowerTrench
®
Symmetrical Dual
©2012 Fairchild Semiconductor Corporation 5 www.fairchildsemi.com
FDMS8090 Rev.C1
Figure 13. Junction-to-Ambient Transient Thermal Response Curve
10
-4
10
-3
10
-2
10
-1
110
100 1000
0.0001
0.001
0.01
0.1
1
2
SINGLE PULSE
R
θJA
= 138
o
C/W
DUTY CYCLE-DESCENDING ORDER
NORMALIZED THERMAL
IMPEDANCE,
Z
θJA
t, RECTANGULAR PULSE DURATION (sec)
D = 0.5
0.2
0.1
0.05
0.02
0.01
P
DM
t
1
t
2
NOTES:
DUTY FACTOR: D = t
1
/t
2
PEAK T
J
= P
DM
x Z
θJA
x R
θJA
+ T
A
Typical Characteristics T
J
= 25 °C unless otherwise noted