120NQ...(R) Series
Bulletin PD-2.224 rev. D 07/04
4
www.irf.com
Fig. 8 - Unclamped Inductive Test Circuit
Fig. 5 - Maximum Allowable Case Temperature
Vs. Average Forward Current
Fig. 6 - Forward Power Loss Characteristics
Fig. 7 - Maximum Non-Repetitive Surge Current
FREE- W H EEL
DIODE
40HFL40S02
CURRENT
MONITOR
HIGH-SPEED
SWITCH
IRFP460
L
DUT
Rg = 2 5 o h m
Vd = 25 Volt
+
1000
10000
100000
10 100 1000 10000
FSM
Non-Repet it ive Surge Current - I (A)
p
Square Wave Pulse Duration - t (microsec )
At Any Rated Load Condition
And With Rated V App lied
Following Surge
RRM
80
90
100
110
120
130
140
150
160
0 20406080100120140160180
DC
Allowable Case Temperature - (°C)
F( A V )
Average Forward Current - I (A)
se e no te ( 2 )
Sq ua re wa ve (D = 0.50)
80% Rated V applied
R
0
10
20
30
40
50
60
70
80
90
100
0 20406080100120140160180
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
Average Forward Current - I (A)
(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
