VS-VSKDS409 Datasheet, PDF (4/7 Pages) Vishay Siliconix – Low forward voltage drop

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180
160
140
120
DC
100
80
60
Square wave (D = 0.50)
40 80 % rated V_R applied
20 _{See note (1)}
0
0
100
200
300
400
500
94649_05
I_F(AV) - Average Forward Current (A)
Fig. 5 - Maximum Allowable Case Temperature vs.
Average Forward Current (Per Leg)
100 000
VS-VSKDS409/150
Vishay Semiconductors
300
250
D = 0.75
200 _{D = 0.50}
D = 0.33
150 ^{D = 0.25}
D = 0.20
RMS limit
100
DC
50
0
0
50 100 150 200 250 300
94649_06
I_F(AV) - Average Forward Current (A)
Fig. 6 - Forward Power Loss Characteristics (Per Leg)
At any rated load condition
and with rated V_RRM applied
following surge
10 000
1000
10
100
1000
10 000
94649_07 t_p - Square Wave Pulse Duration (µs)
Fig. 7 - Maximum Non-Repetitive Surge Current
D.U.T.
Current
monitor
L
IRFP460
R_g = 25 Ω
High-speed
switch
Freewheel
diode
+ ^{Vd = 25 V}
40HFL40S02
Fig. 8 - Unclamped Inductive Test Circuit
Note
(1) _{Formula used: TC = TJ - (Pd + PdREV) x RthJC;ï€} 
Pd = Forward power loss = I_F(AV) x V_FM at (I_F(AV)/D) (see fig. 6);
Pd_REV = Inverse power loss = V_R1 x I_R (1 - D); I_R at V_R1 = 80 % rated V_R
Revision: 19-Mar-14
4
Document Number: 94649
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