Fig. 5 Three phase rectifier bridge:
Power dissipation versus direct
output current and ambient
temperature
Circuit
B 6
3 x PSKD 26
Fig. 6 Transient thermal impedance
junction to case (per diode)
RthJC for various conduction angles d:
d
RthJC (K/W)
DC
180°
120°
60°
1.00
1.02
1.04
1.07
1.10
30°
Constants for ZthJC calculation:
i
Rthi (K/W)
ti (s)
1
2
3
0.01
0.03
0.96
0.0012
0.095
0.455
Fig. 7 Transient thermal impedance
junction to heatsink (per diode)
RthJK for various conduction angles d:
d
RthJK (K/W)
DC
180°
120°
60°
1.20
1.22
1.24
1.27
1.30
30°
Constants for ZthJK calculation:
i
Rthi (K/W)
ti (s)
1
2
3
4
0.01
0.03
0.96
0.2
0.0012
0.095
0.455
0.495
POWERSEM GmbH, Walpersdorfer Str. 53
2003 POWERSEM reserves the right to change limits, test conditions and dimensions
D - 91126 Schwabach
Phone: 09122 - 9764 - 0 FAX: 09122 - 9764 - 20
POWERSEM [ POWERSEM GMBH ]
