C&H Technology UFB120FA20P - Manual (Page 5)

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4 Revision: 07-May-08
UFB120FA20P
Vishay High Power Products Insulated Ultrafast
Rectifier Module, 120 A
Fig. 5 - Maximum Allowable Case Temperature vs.
Average Forward Current (Per Diode)
Fig. 6 - Forward Power Loss (Per Diode)
Fig. 7 - Typical Reverse Recovery Time vs. dI
F
/dt
Fig. 8 - Typical Stored Charge vs. dI
F
/dt
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
Average Forward Current - I
F(AV)
(A)
Allowable Case Temperature (°C)
80
90
100
110
120
130
140
150
0 10 20 30 40 50 60 70
DC
Square wave (D = 0.50)
80% Rated Vr applied
see note (1)
Average Power Loss ( Watts )
Average Forward Current - I
F(AV)
(A)
0
10
20
30
40
50
60
0 10 20 30 40 50 60 70
DC
RMS Limit
D = 0.01
D = 0.02
D = 0.05
D = 0.10
D = 0.20
D = 0.50
trr ( ns )
dI
F
/dt (A/µs )
0
10
20
30
40
50
60
70
80
0 0 0 1 0 0 1
Tj = 125˚C
Tj = 25˚C
If = 50A
Vrr = 200V
Qrr ( nC )
dI
F
/dt (A/µs )
0
100
200
300
400
500
600
700
800
0 0 0 1 0 0 1
Tj = 125˚C
Tj = 25˚C
If = 50A
Vrr = 200V