50WQ06FN
Bulletin PD-20525 rev. G 05/06
Fig. 5 - Maximum Allowable Case Temperature
Vs. Average Forward Current
Fig. 6 - Forward Power Loss Characteristics
Fig. 7 - Maximum Non-Repetitive Surge Current
(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
115
120
125
130
135
140
145
150
155
012345678
DC
Allowable Case Temperature - (°C)
F( A V )
se e no te ( 2)
Sq ua re wa ve (D = 0.50)
80% Rated V a pplied
R
Average Forward Current - I (A)
0
1
2
3
4
5
012345678
DC
Average Power Loss - (Watts)
F( A V )
RM S Li m it
D = 0.20
D = 0.25
D = 0.33
D = 0.50
D = 0.75
Averag e Forward Current - I (A)
10
100
1000
10 100 1000 10000
FSM
Non-Repet it ive Surge Current - I (A)
p
At Any Rated Load Condition
And With Ra ted V Applied
Follo wing Surg e
RRM
Square Wave Pulse Duration - t (mic rosec )
