12CTQ... Series
Bulletin PD-20554 rev. B 07/01
17 5
A llow ab le C a se Tem p e ra ture - ( C )
Ave ra ge P ow er Loss - (W atts)
5
4 .5
17 0
4
3 .5
3
2 .5
2
1 .5
1
0 .5
0
0
2
4
6
8
10
0
2
4
6
8
10
A vera ge Forw ard C urrent - I
F(AV)
(A )
A vera ge Forw ard C urren t - I
F(AV)
(A)
RM S Lim it
DC
D
D
D
D
D
=
=
=
=
=
0.20
0.25
0.33
0.50
0.75
16 5
DC
16 0
Sq ua re wa ve (D = 0.50)
80% Ra ted V a p p lied
R
15 5
see note (2)
15 0
Fig. 5 - Max. Allowable Case Temperature
Vs. Average Forward Current (Per Leg)
N on-Rep etitive Surg e C urrent - I
FSM
(A)
10 0 0
Fig. 6 - Forward Power Loss Characteristics
(Per Leg)
At An y Rated Load C ond ition
An d W ith Rated V
RRM
A pp lied
Follow in g Surg e
1 00
10
100
1 00 0
10 0 00
Sq uare W ave Pulse D uration - t p (m icrosec)
Fig. 7 - Max. Non-Repetitive Surge Current (Per Leg)
L
H IG H -SPE ED
SW ITC H
FREE-W HE EL
D IO D E
40H FL40S02
V d = 25 V olt
D UT
IRFP460
Rg = 25 ohm
+
C UR RE N T
M O N ITO R
Fig. 8 - Unclamped Inductive Test Circuit
(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
www.irf.com
IRF [ INTERNATIONAL RECTIFIER ]
