MDD 172
Fig. 5 Three phase rectifier bridge:
Power dissipation versus direct
output current and ambient
temperature
Fig. 6 Transient thermal impedance
junction to case (per diode)
R
thJC
for various conduction angles d:
d
DC
180°
120°
60°
30°
R
thJC
(K/W)
0.210
0.223
0.233
0.260
0.295
Constants for Z
thJC
calculation:
i
1
2
3
R
thi
(K/W)
0.0087
0.0163
0.185
t
i
(s)
0.001
0.065
0.4
Fig. 7 Transient thermal impedance
junction to heatsink (per diode)
R
thJK
for various conduction angles d:
d
DC
180°
120°
60°
30°
R
thJK
(K/W)
0.31
0.323
0.333
0.360
0.395
Constants for Z
thJK
calculation:
i
1
2
3
4
R
thi
(K/W)
0.0087
0.0163
0.185
0.1
t
i
(s)
0.001
0.065
0.4
1.29
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