PSTKD 82
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)
RthJC for various conduction angles d:
d
RthJC (K/W)
DC
180°
120°
60°
0.35
0.37
0.39
0.43
0.47
30°
Constants for ZthJC calculation:
i
Rthi (K/W)
ti (s)
1
2
3
0.013
0.072
0.265
0.0014
0.062
0.375
Fig. 7 Transient thermal impedance
junction to heatsink (per diode)
RthJK for various conduction angles d:
d
RthJK (K/W)
DC
180°
120°
60°
0.55
0.57
0.59
0.63
0.67
30°
Constants for ZthJK calculation:
i
Rthi (K/W)
ti (s)
1
2
3
4
0.013
0.072
0.265
0.2
0.0014
0.062
0.375
1.32
2002 POWERSEM reserves the right to change limits, test conditions and dimensions
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