D 721 S
4000
4000
100%
90% 80% 70% 60%
50%
3500
PFAV
[W]
iF
[A]
3000
3000
40%
30%
2500
2000
1500
1000
500
2000
1000
0
20%
10%
5%
0
1,0
1,5
2,0
2,5
3,0
3,5
vF [V]
4,0
4,5
500
1000
1500
2000
IF [A]
2500
D 721 S_02
D 721 S_01
Fig. 1
On-state characteristic iF = f(VF)
Fig. 2
On-state losses (average values)
IF = f(PFAV
t
= 125°C
vj
)
Upper limit of scatter range
Lower limit of scatter range
tvj = 125 °C
0,06
0,05
Analytical elements of transient thermal impedance ZthJC for DC
1. ZthJC
2. ZthJC
3. ZthJC
t
t
t
[s]
r [K/W]
[s]
r [K/W]
[s]
r [K/W]
ZthJC
[K/W]
1
2
3
4
5
S
0,00637 1,80000 0,02137 8,00000 0,02837 6,80000
0,00904 0,14000 0,00904 0,14000 0,00904 0,14000
0,00267 0,01410 0,00167 0,01410 0,00167 0,01410
0,00080 0,00265 0,00080 0,00265 0,00080 0,00265
0,00012 0,00067 0,00012 0,00067 0,00012 0,00067
3
2
0,04
0,00180
-
0,03300
-
0,04000
-
0,03
0,02
0,01
Analytical function:
n
max
ZthJC =
Rthn (1-EXP(-t/t n))
S
1
n = 1
2
3 4 6 8
2
3 4 6 8
2
3 4 6 8
2
3 4 6 8
2
3 4 6 8
0
0,001
0,01
0,1
1
10
t [s]
100
D 721 S_03
Fig. 3
Transient thermal impedance ZthJC = f(t), DC
1 - Two-sided cooling
2 - Anode-sided cooling
3 - Cathode-sided cooling
EUPEC [ EUPEC GMBH ]
