Vishay high power products – C&H Technology 87CNQ020APbF User Manual
Page 5
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Document Number: 94261
4
Revision: 13-Aug-08
87CNQ020APbF
Vishay High Power Products
Schottky Rectifier
New Generation 3
D-61 Package, 2 x 40 A
Fig. 5 - Maximum Allowable Case Temperature vs.
Average Forward Current (Per Leg)
Fig. 6 - Forward Power Loss Characteristics (Per Leg)
Fig. 7 - Maximum Non-Repetitive Surge Current (Per Leg)
Fig. 8 - Unclamped Inductive Test Circuit
Note
(1)
Formula used: T
C
= T
J
- (Pd + Pd
REV
) x R
thJC
;
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
120
125
130
135
140
145
150
Allowable Case Temperature (°C)
I
F(AV)
- Average Forward Current (A)
30
20
10
40
50
60
0
DC
See note (1)
Square wave (D = 0.50)
80 % rated V
R
applied
0
15
20
10
5
25
Average Power Loss (W)
I
F(AV)
- Average Forward Current (A)
20
10
30
40
60
50
0
DC
RMS limit
D = 0.20
D = 0.25
D = 0.33
D = 0.50
D = 0.75
100
10 000
1000
I
FSM
- Non-Repetitive Surge Current (A)
t
p
- Square Wave Pulse Duration (µs)
100
1000
10 000
10
At any rated load condition
and with rated V
RRM
applied
following surge
Current
monitor
High-speed
switch
D.U.T.
R
g
= 25
Ω
+
Freewheel
diode
V
d
= 25 V
L
IRFP460
40HFL40S02