163CNQ... Series
4
Bulletin PD-21060 06/05
www.irf.com
Fig. 7 - Max. Non-Repetitive Surge Current (Per Leg)
Fig. 5 - Max. Allowable Case Temperature
Vs. Average Forward Current (Per Leg)
Fig. 8 - Unclamped Inductive Test Circuit
Fig. 6 - Forward Power Loss Characteristics
(Per Leg)
100
1000
10000
10 100 1000 10000
FSM
p
Non-Repetitive Surge Current - I (A)
At Any Rated Load Condition
And With Rated V Applied
Following Surge
RRM
Square Wave Pulse Duration - t (microsec)
FREE- W HEEL
DIODE
40HFL40S02
CURRENT
MONITOR
HIGH-SPEED
SW I TC H
IRFP460
L
DUT
Rg = 25 ohm
Vd = 25 Volt
+
Average Forward Current - I
F(AV)
(A)
Allowable Cse Tempearture (°C)
Average Forward Current - I
F(AV)
(A)
Average Power Loss (Watts)
(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
applied
60
80
100
120
140
160
180
0 20 40 60 80 100 12
DC
see note (2)
Square wave (D = 0.50)
80% Rated Vr applied
0
20
40
60
80
100
0 20 40 60 80 100 12
DC
RMS Limit
D = 0.20
D = 0.25
D = 0.33
D = 0.50
D = 0.75
