12CWQ06FN
Bulletin PD-20547 rev. F 05/02
1 55
Allow a b le C ase Tem pera t ure - ( C )
1 50
1 45
1 40
1 35
1 30
1 25
1 20
1 15
1 10
0
1
2
3
4
5
6
7
8
9
Avera ge Forw a rd C urren t - I
F(A V )
(A )
se e note (2)
6
Avera ge Pow er Loss - (W a tts)
5
4
3
2
1
0
0
1
2
3
4
5
6
7
8
9
A vera ge Forw ard C urrent - I
F(A V )
(A )
D
D
D
D
D
=
=
=
=
=
0.20
0.25
0.33
0.50
0.75
DC
DC
RM S Lim it
Sq uare w a ve (D = 0.50)
80% Rated V
R
ap p lied
Fig. 5 - Max. Allowable Case Temperature
Vs. Average Forward Current (Per Leg)
1000
No n-Rep e titive Surg e C urren t - I
FSM
(A)
Fig. 6 - Forward Power Loss Characteristics
(Per Leg)
100
A t A ny Ra ted Loa d C on dition
A nd W ith Ra ted V
RRM
Ap p lied
Follow ing Surge
10
10
100
1000
10000
Squa re W a ve Pulse D ura tion - t p (m icrosec)
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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