30CTQ... Series
Bulletin PD-20300 rev. D 07/04
Fig. 8 - Unclamped Inductive Test Circuit
FREE- W H EEL
DIODE
40HFL40S02
C URREN T
MONITOR
H I G H- SPEED
SWITCH
IRFP460
L
DUT
Rg = 25 ohm
Vd = 25 Volt
+
(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
= 10 V
Fig. 7 - Max. Non-Repetitive Surge Current (Per Leg)
Fig. 5 - Max. Allowable Case Temperature
Vs. Average Forward Current (Per Leg)
Fig. 6 - Forward Power Loss Characteristics
(Per Leg)
60
70
80
90
100
110
120
130
140
150
160
0 5 10 15 20 25
DC
Allowable Case Temperature - (°C)
F( A V )
see note ( 2)
Sq ua re w a v e (D = 0.50)
80% Rated V applied
Average Forward Current - I (A)
R
0
2
4
6
8
10
12
14
0 5 10 15 20 25
DC
Average Power Loss - (Watts)
F(AV)
RM S Li m i t
D = 0.20
D = 0.25
D = 0.33
D = 0.50
D = 0.75
Average Forward Current - I (A)
100
1000
10 100 1000 10000
FSM
Non-Repetitive Surge Current - I (A)
p
At Any Rated Load Condition
And With Rated V App lied
Following Surge
RRM
Square Wave Pulse Duration - t (microsec)
