Datasheet
SLIS056A − FEBRUARY 1995 − REVISED MARCH 1996
14
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443
• HOUSTON, TEXAS 77251−1443
THERMAL INFORMATION
NE PACKAGE
TRANSIENT THERMAL IMPEDANCE
vs
ON TIME
The single-pulse curve represents measured data. The
curves for various pulse durations are based on the
following equation:
t − On Time − s
C
°
θ
Z − Transient Thermal Impedance − /W
JA
0.1
0.001 0.01 0.1 1 10 100
1
10
100
1000
Single Pulse
d = 2%
d = 5%
d = 10%
d = 20%
d = 50%
t
w
t
c
I
D
0
Z
q
JA
+
Ť
t
w
t
c
Ť
R
q
JA
)
Ť
1 –
t
w
t
c
Ť
Z
q
ǒ
t
w
) t
c
Ǔ
) Z
q
ǒ
t
w
Ǔ
–Z
q
ǒ
t
c
Ǔ
= the single-pulse thermal impedance
for t = t
w
seconds
= the single-pulse thermal impedance
for t = t
c
seconds
= the single-pulse thermal impedance
for t = t
w
+ t
c
seconds
Where:
d = t
w
/t
c
Z
q
ǒ
t
w
Ǔ
Z
q
ǒ
t
c
Ǔ
Z
q
ǒ
t
w
) t
c
Ǔ
Figure 16