VS-12CTQ...PbF Series, VS-12CTQ...-N3 Series
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Vishay Semiconductors
Revision: 22-Aug-11
4
Document Number: 94130
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Fig. 5 - Maximum Allowable Case Temperature vs. Average
Forward Current (Per Leg)
Fig. 6 - Forward Power Loss Characteristics (Per Leg)
Fig. 7 - Maximum Non-Repeti
tive Surge Current (Per Leg)
Fig. 8 - Unclamped Inductive Test Circuit
Note
(1)
Formula used: TC
= T
J
- (Pd + Pd
REV) x RthJC;
Pd = Forward power loss = IF(AV)
x V
FM
at (I
F(AV)/D) (see fig. 6);
PdREV
= Inverse power loss = V
R1
x I
R
(1 - D); I
R
at V
R1
= 80 % rated V
R
Allowable Case Temperature (°C)
IF(AV)
- Average Forward Current (A)
0
8
10
4
150
155
160
165
170
175
See note (1)
Square wave (D = 0.50)
80 % rated VR
applied
DC
2
6
0
Average Power Loss - (W)
IF(AV)
- Average Forward Current (A)
0
46 108
D = 0.20
D = 0.25
D = 0.33
D = 0.50
D = 0.75
RMS limit
DC
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
2
I
FSM
- Non-Repetitive Surge Current (A)
tp
- Square Wave Pulse Duration (μs)
100
1000
10
100
1000
10 000
At any rated load condition
and with rated VRRM
applied
following surge
Current
monitor
High-speed
switch
D.U.T.
Rg
= 25
Ω
+
Vd
= 25
V
Freewheel
diode
L
IRFP460
40HFL40S02
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