Typical Characteristics T J = 25°C unless otherwise noted
2
1
DUTY CYCLE-DESCENDING ORDER
D = 0.5
0.2
FOR TEMPERATURES
C
= ------------------------
t
125 1
0.1
0.01
0.1
0.05
0.02
0.01
NOTES:
ABOVE 25 o C DERATE PEAK
P DM
CURRENT AS FOLLOWS:
150 – T
25
t 2
T C = 25 o C
R θ JC = 1.8 C/W
SINGLE PULSE
o
DUTY FACTOR: D = t 1 /t 2
PEAK T J = P DM x Z θ JC x R θ JC + T C
10
10
10
10
10
10
0.001
-6
-5
-4
-3
-2
-1
1
t, RECTANGULAR PULSE DURATION (sec)
Figure 13. Transient Thermal Response Curve
2
1
DUTY CYCLE-DESCENDING ORDER
D = 0.5
0.2
0.1
0.1
0.05
P DM
0.02
0.01
t 1
R θ JA = 40 C/W
0.01
SINGLE PULSE
o
NOTES:
DUTY FACTOR: D = t 1 /t 2
t 2
( Note 1a )
PEAK T J = P DM x Z θ JA x R θ JA + T A
10
10
10
10
0.001
-4
-3
-2
-1
1
10
100
1000
t, RECTANGULAR PULSE DURATION (sec)
Figure 14. Transient Thermal Response Curve
2
1
0.1
DUTY CYCLE-DESCENDING ORDER
D = 0.5
0.2
0.1
0.05
P DM
0.01
0.02
0.01
t 1
SINGLE PULSE
t 2
R θ JA = 96 C/W
0.001
o
( Note 1b )
NOTES:
DUTY FACTOR: D = t 1 /t 2
PEAK T J = P DM x Z θ JA x R θ JA + T A
10
10
10
10
0.0001
-4
-3
-2
-1
1
10
100
1000
t, RECTANGULAR PULSE DURATION (sec)
Figure 15. Transient Thermal Response Curve
?2008 Fairchild Semiconductor Corporation
FDD3860 Rev.C1
5
www.fairchildsemi.com
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