1/6
Table 1: Main Product Characteristics
I
F(AV)
2 x 20 A
V
RRM
120 V
T
j
(max)
175C
V
F
(typ)
0.57 V
STPS40120C
POWER SCHOTTKY RECTIFIER
REV. 1
Table 3: Absolute Ratings (limiting values, per diode)
Symbol
Parameter
Value
Unit
V
RRM
Repetitive peak reverse voltage
120
V
I
F(RMS)
RMS forward voltage
30
A
I
F(AV)
Average forward current
= 0.5
T
c
= 145C
Per diode
Per device
20
40
A
I
FSM
Surge non repetitive forward current
t
p
= 10ms sinusoidal
200
A
P
ARM
Repetitive peak avalanche power
t
p
= 1s T
j
= 25C
10500
W
T
stg
Storage temperature range
-65 to + 175
C
T
j
Maximum operating junction temperature *
175
C
* :
thermal runaway condition for a diode on its own heatsink
dPtot
dTj
---------------
1
Rth j
a
(
)
--------------------------
>
K
K
A2
A1
TO-220AB
STPS40120CT
K
A1
A2
February 2005
FEATURES AND BENEFITS
High junction temperature capability
Avalanche rated
Low leakage current
Good trade-off between leakage current and
forward voltage drop
DESCRIPTION
Dual center tap Schottky rectifier suited for high
frequency Switch Mode Power Supply.
Packaged in TO-220AB, this device is intended to
be used in notebook & LCD adaptors, desktop
SMPS, providing in these applications a margin
between the remaining voltages applied on the
diode and the voltage capability of the diode.
Table 2: Order Code
Part Number
Marking
STPS40120CT
STPS40120CT
STPS40120C
2/6
Table 4: Thermal Parameters
Table 5: Static Electrical Characteristics (per diode)
Pulse test:
* tp = 5 ms,
< 2%
** tp = 380 s,
< 2%
To evaluate the conduction losses use the following equation: P = 0.58 x IF(AV) + 0.0075 IF
2
(RMS)
Symbol
Parameter
Value
Unit
R
th(j-c)
Junction to case
Per diode
Total
1.6
0.85
C/W
R
th(c)
Coupling
Total
0.1
C/W
When the diodes 1 and 2 are used simultaneously:
Tj(diode 1) = P(diode 1) x Rth(j-c)(per diode) + P(diode 2) x Rth(c)
Symbol
Parameter
Tests conditions
Min.
Typ
Max.
Unit
I
R
*
Reverse leakage current
T
j
= 25C
V
R
= V
RRM
25
A
T
j
= 125C
4
12
mA
V
F
**
Forward voltage drop
T
j
= 25C
I
F
= 7.5A
0.73
V
T
j
= 125C
0.57
0.61
T
j
= 25C
I
F
= 20A
0.9
T
j
= 125C
0.69
0.73
T
j
= 25C
I
F
= 40A
1
T
j
= 125C
0.83
0.88
STPS40120C
3/6
Figure 1: Average forward power dissipation
versus average forward current (per diode)
Figure 2: Average forward current versus
ambient temperature (
= 0.5, per diode)
Figure 3: Normalized avalanche power
derating versus pulse duration
Figure 4:
Normalized avalanche power
derating versus junction temperature
Figure 5: Non repetitive surge peak forward
current versus overload duration (maximum
values, per diode)
Figure 6: Relative variation of thermal
impedance junction to ambient versus pulse
duration
0
2
4
6
8
10
12
14
16
18
20
0
2
4
6
8
10
12
14
16
18
20
22
24
P
(W)
F(AV)
T
=tp/T
tp
= 1
= 0.05
I
(A)
F(AV)
= 0.5
= 0.2
= 0.1
0
2
4
6
8
10
12
14
16
18
20
22
0
25
50
75
100
125
150
175
I
(A)
F(AV)
T
=tp/T
tp
T
(C)
amb
R
=15C/W
th(j-a)
R
=R
th(j-a)
th(j-c)
0.001
0.01
0.1
0.01
1
0.1
10
100
1000
1
t (s)
p
P
(t )
P
(1s)
ARM p
ARM
0
0.2
0.4
0.6
0.8
1
1.2
25
50
75
100
125
150
T (C)
j
P
(t )
P
(25C)
ARM p
ARM
0
20
40
60
80
100
120
140
160
180
200
220
240
1.E-03
1.E-02
1.E-01
1.E+00
I (A)
M
I
M
t
=0.5
T =25C
c
T =75C
c
T =125C
c
t(s)
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
1.E-03
1.E-02
1.E-01
1.E+00
Z
/R
th(j-c)
th(j-c)
T
=tp/T
tp
t (s)
p
= 0.5
= 0.2
= 0.1
Single pulse
STPS40120C
4/6
Figure 7: Reverse leakage current versus
reverse voltage applied (typical values, per
diode)
Figure 8: Junction capacitance versus reverse
voltage applied (typical values, per diode)
Figure 9: Forward voltage drop versus forward
current (per diode)
1.E-05
1.E-04
1.E-03
1.E-02
1.E-01
1.E+00
1.E+01
1.E+02
0
10
20
30
40
50
60
70
80
90
100
110
120
I (mA)
R
V (V)
R
T =125C
j
T =25C
j
T =50C
j
T =75C
j
T =100C
j
T =150C
j
10
100
1000
1
10
100
C(pF)
V (V)
R
F=1MHz
V
=30mV
T =25C
OSC
RMS
j
1
10
100
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
I
(A)
FM
V
(V)
FM
T =25C
(maximum values)
j
T =125C
(maximum values)
j
T =125C
(typical values)
j
STPS40120C
5/6
Figure 10: TO-220AB Package Mechanical Data
A
C
D
L7
Dia
L5
L6
L9
L4
F
H2
G
G1
L2
F2
F1
E
M
Table 6: Ordering Information
Epoxy meets UL94, V0
Cooling method: by conduction (C)
Recommended torque value: 0.8 m.N.
Maximum torque value: 1.0 m.N.
Ordering type
Marking
Package
Weight
Base qty
Delivery mode
STPS40120CT
STPS40120CT
TO-220AB
2.23 g
50
Tube
Table 7: Revision History
Date
Revision
Description of Changes
18-Feb-2005
1
First issue.
REF.
DIMENSIONS
Millimeters
Inches
Min.
Max.
Min.
Max.
A
4.40
4.60
0.173
0.181
C
1.23
1.32
0.048
0.051
D
2.40
2.72
0.094
0.107
E
0.49
0.70
0.019
0.027
F
0.61
0.88
0.024
0.034
F1
1.14
1.70
0.044
0.066
F2
1.14
1.70
0.044
0.066
G
4.95
5.15
0.194
0.202
G1
2.40
2.70
0.094
0.106
H2
10
10.40
0.393
0.409
L2
16.4 typ.
0.645 typ.
L4
13
14
0.511
0.551
L5
2.65
2.95
0.104
0.116
L6
15.25
15.75
0.600
0.620
L7
6.20
6.60
0.244
0.259
L9
3.50
3.93
0.137
0.154
M
2.6 typ.
0.102 typ.
Diam.
3.75
3.85
0.147
0.151
PDF 
ZIP