300CNQ... Series
Bulletin PD-20481 10/01
160
Allowable Case Temperature (擄C)
140
Average Power Loss (Watts)
150
140
130
120
110
100
Square wave (D = 0.50)
90
80% Rated Vr applied
80
70
see note (2)
60
0
50
100
150
200
F(AV)
120
100
RMS Limit
DC
DC
80
60
40
20
0
0
50
100
150
D = 0.75
D = 0.50
D = 0.33
D = 0.25
D = 0.20
250
(A)
200
F(AV)
250
(A)
Average Forward Current - I
Average Forward Current - I
Fig. 5 - Max. Allowable Case Temperature
Vs. Average Forward Current
Fig. 6 - Forward Power Loss
Characteristics
(A)
100000
At Any Rated Load Condition
And With Rated Vrrm Applied
Following Surge
Non-Repetitive Surge Current - I
FSM
10000
1000
10
100
1000
10000
Square Wave Pulse Duration - t
p
(microsec)
Fig. 7 - Max. Non-Repetitive Surge Current (Per Leg)
(2)
Formula used: T
C
= T
J
- (Pd + Pd
REV
) x R
thJC
;
Pd = Forward Power Loss = I
F(AV)
x V
FM
@ (I
F(AV)
/
D) (see Fig. 6);
Pd
REV
= Inverse Power Loss = V
R1
x I
R
(1 - D); I
R
@ V
R1
= 80% rated V
R
4
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