February 2010 Doc ID 3506 Rev 6 1/10
10
STPS2045C
Power Schottky rectifier
Features
■Very small conduction losses
■Negligible switching losses
■Extremely fast switching
■Insulated package: TO-220FPAB
Insulating voltage = 2000 V DC
Capacitance = 12 pF
■Avalanche rated
Description
Dual center tap Schottky rectifier suited for switch
mode power supply and high frequency DC to DC
converters.
Packaged either in TO-220AB, TO-220FPAB,
I2PA K , o r D 2PAK, this device is especially
intended for use in low voltage, high frequency
inverters, free wheeling and polarity protection
applications.
Table 1. Device summary
Symbol Value
IF(AV) 2 x 10 A
VRRM 45 V
Tj(max) 175 °C
VF(typ) 0.57 V
I2PAK
STPS2045CR
D2PAK
STPS2045CG
TO-220FPAB
STPS2045CFP
TO-220AB
STPS2045CT
A1 K
A2
A1KA2
A1
KA2
A1
A2
K
K
A1
A2
www.st.com
Characteristics STPS2045C
2/10 Doc ID 3506 Rev 6
1 Characteristics
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)
Table 2. Absolute ratings (limiting values, per diode)
Symbol Parameter Value Unit
VRRM Repetitive peak reverse voltage 45 V
IF(RMS) Forward rms current 30 A
IF(AV) Average forward current δ = 0.5
TO-220AB
D2PAK I2PA K Tc = 155 °C Per diode 10 A
TO-220FPAB Tc = 125 °C Per device 20
IFSM Surge non repetitive forward current tp = 10 ms sinusoidal 180 A
PARM Repetitive peak avalanche power tp = 1 μs Tj = 25 °C 4000 W
Tstg Storage temperature range -65 to + 175 °C
TjMaximum operating junction temperature(1)
1. condition to avoid thermal runaway for a diode on its own heatsink
175 °C
Table 3. Thermal resistances parameters
Symbol Parameter Value Unit
Rth(j-c) Junction to case
TO-220AB / D2PAK / I 2PA K Per diode
To t a l
2.2
1.3 °C/W
TO-220FPAB Per diode
To t a l
4.5
3.5
Rth(c) Coupling TO-220AB / D2PAK / I 2PAK Coupling 0.3 °C/W
TO-220FPAB 2.5
dPtot
dTj <1
Rth(j-a)
Table 4. Static electrical characteristics (per diode)
Symbol Test conditions Min. Typ. Max. Unit
IR(1) Reverse leakage current Tj = 25 °C VR = VRRM
100 μA
Tj = 125 °C 7 15 mA
VF(1) Forward voltage drop
Tj = 125 °C IF = 10 A 0.5 0.57
VTj = 25 °C IF = 20 A 0.84
Tj = 125 °C 0.65 0.72
1. Pulse test : tp = 380 μs, δ < 2%
To evaluate the conduction losses use the following equation : P = 0.42 x IF(AV) + 0.015 IF2(RMS)
STPS2045C Characteristics
Doc ID 3506 Rev 6 3/10
Figure 1. Average forward power dissipation
vs average forward current
(per diode)
Figure 2. Average forward current vs ambient
temperature (δ = 0.5, per diode)
0 1 2 3 4 5 6 7 8 9 10 11 12
0
1
2
3
4
5
6
7
8
P (W)
F(AV)
I (A)
F(AV)
T
δ=tp/T tp
δ= 1
δ= 0.5
δ= 0.2
δ= 0.1
δ= 0.05
I (A)
F(AV)
0 25 50 75 100 125 150 175
0
2
4
6
8
10
12
TO-220AB
D²PAK
TO-220FPAB
T (°C)
amb
T
δ=tp/T tp
R=R
th(j-a) th(j-c)
R =15°C/W
th(j-a)
Figure 3. Normalized avalanche power
derating vs pulse duration
Figure 4. Normalized avalanche power
derating vs junction temperature
0.001
0.01
0.10.01 1
0.1
10 100 1000
1
t (µs)
p
P(t)
P (1µs)
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
j)
P (25 °C)
ARM
ARM
Figure 5. Non repetitive surge peak forward
current vs overload duration
(maximum values, per diode)
Figure 6. Non repetitive surge peak forward
current vs overload duration
(maximum values, per diode)
1E-3 1E-2 1E-1 1E+0
0
20
40
60
80
100
120
140
I (A)
M
T =100°C
C
T =125°C
C
T =75°C
C
t(s)
I
M
t
δ
=0.5
(TO-220AB, D PAK, I PAK)
22
1E-3 1E-2 1E-1 1E+0
0
20
40
60
80
100
I (A)
M
T =100°C
C
T =125°C
C
T =75°C
C
t(s)
I
M
t
δ=0.5
(TO-220FPAB)
Characteristics STPS2045C
4/10 Doc ID 3506 Rev 6
Figure 7. Relative variation of thermal
impedance junction to ambient vs
pulse duration
Figure 8. Relative variation of thermal
impedance junction to ambient vs
pulse duration (TO-220FPAB)
1E-4 1E-3 1E-2 1E-1 1E+0
0.0
0.2
0.4
0.6
0.8
1.0
Single pulse
δ= 0.1
δ= 0.2
δ= 0.5
t (s)
p
Z/R
th(j-c) th(j-c)
T
δ
=tp/T tp
(TO-220AB, D PAK, I PAK)
22
1E-3 1E-2 1E-1 1E+0 1E+1
0.0
0.2
0.4
0.6
0.8
1.0
Single pulse
δ= 0.1
δ= 0.2
δ= 0.5
t (s)
p
Z/R
th(j-c) th(j-c)
T
δ=tp/T tp
Figure 9. Reverse leakage current vs reverse
voltage applied
(typical values, per diode)
Figure 10. Junction capacitance vs reverse
voltage applied
(typical values, per diode)
0 5 10 15 20 25 30 35 40 45
1E-1
1E+0
1E+1
1E+2
1E+3
1E+4
5E+4
I (µA)
R
V (V)
R
T =150°C
j
T =125°C
j
T =100°C
j
T =75°C
j
T =50°C
j
T =25°C
j
12 51020 50
100
200
500
1000
C(pF)
V (V)
R
F=1MHz
V =30mV
T =25°C
OSC RMS
j
Figure 11. Forward voltage drop vs forward
current
(maximum values, per diode)
Figure 12. Thermal resistance junction to
ambient vs copper surface under
tab
0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6
0.1
1.0
10.0
100.0
I (A)
FM
T =125°C
(typical values)
j
T =125°C
jT =25°C
j
V (V)
FM
0 5 10 15 20 25 30 35 40
0
10
20
30
40
50
60
70
80
S(cm²)
R (°C/W)
th(j-a)
(Epoxy printed circuit board, copper thickness: 35 µm)
(D PAK)
2
STPS2045C Package information
Doc ID 3506 Rev 6 5/10
2 Package information
●Epoxy meets UL94, V0
●Cooling method: by conduction (C)
●Recommended torque value: 0.4 N·m to 0.6 N·m
In order to meet environmental requirements, ST offers these devices in different grades of
ECOPACK® packages, depending on their level of environmental compliance. ECOPACK®
specifications, grade definitions and product status are available at: www.st.com.
ECOPACK® is an ST trademark.
Figure 13. Footprint (dimensions in mm)
Table 5. D2PAK dimensions
Ref.
Dimensions
Millimeters Inches
Min. Max. Min. Max.
A 4.40 4.60 0.173 0.181
A1 2.49 2.69 0.098 0.106
A2 0.03 0.23 0.001 0.009
B 0.70 0.93 0.027 0.037
B2 1.14 1.70 0.045 0.067
C 0.45 0.60 0.017 0.024
C2 1.23 1.36 0.048 0.054
D 8.95 9.35 0.352 0.368
E 10.00 10.40 0.393 0.409
G 4.88 5.28 0.192 0.208
L 15.00 15.85 0.590 0.624
L2 1.27 1.40 0.050 0.055
L3 1.40 1.75 0.055 0.069
M 2.40 3.20 0.094 0.126
R 0.40 typ. 0.016 typ.
V2 0° 8° 0° 8°
G
L
L3
L2
B
B2
E
* FLAT ZONE NO LESS THAN 2mm
A
C2
D
R
A2
M
V2
C
A1
*
16.90
10.30
8.90 3.70
5.08
1.30
Package information STPS2045C
6/10 Doc ID 3506 Rev 6
Table 6. TO-220AB dimensions
Ref.
Dimensions
Millimeters Inches
Min. Max. Min. Max.
A 4.40 4.60 0.17 0.18
b 0.61 0.88 0.024 0.035
b1 1.14 1.70 0.045 0.067
c 0.48 0.70 0.019 0.027
D 15.25 15.75 0.60 0.62
D1 1.27 typ. 0.05 typ.
E 10 10.40 0.39 0.41
e 2.40 2.70 0.094 0.106
e1 4.95 5.15 0.19 0.20
F 1.23 1.32 0.048 0.052
H1 6.20 6.60 0.24 0.26
J1 2.40 2.72 0.094 0.107
L 13 14 0.51 0.55
L1 3.50 3.93 0.137 0.154
L20 16.40 typ. 0.64 typ.
L30 28.90 typ. 1.13 typ.
øP 3.75 3.85 0.147 0.151
Q 2.65 2.95 0.104 0.116
"GATE"
Notes 9-10
A
F
E
øP
Q
D
b1(X3)
b (X3)
e1
e
J1
L20
H1
c
L
L1
L30
"GATE"
Notes 9-10
123
D1
STPS2045C Package information
Doc ID 3506 Rev 6 7/10
Table 7. I2PAK dimensions
Ref.
Dimensions
Millimeters Inches
Min. Max. Min. Max.
A 4.40 4.60 0.173 0.181
A1 2.40 2.72 0.094 0.107
b 0.61 0.88 0.024 0.035
b1 1.14 1.70 0.044 0.067
c 0.49 0.70 0.019 0.028
c2 1.23 1.32 0.048 0.052
D 8.95 9.35 0.352 0.368
e 2.40 2.70 0.094 0.106
e1 4.95 5.15 0.195 0.203
E 10 10.40 0.394 0.409
L 13 14 0.512 0.551
L1 3.50 3.93 0.138 0.155
L2 1.27 1.40 0.050 0.055
E
L2
L1
b1
D
A1
c
c2
A
b
e
e1
L
Package information STPS2045C
8/10 Doc ID 3506 Rev 6
Table 8. TO-220FPAB dimensions
Ref.
Dimensions
Millimeters Inches
Min. Max. Min. Max.
A 4.4 4.6 0.173 0.181
B 2.5 2.7 0.098 0.106
D 2.5 2.75 0.098 0.108
E 0.45 0.70 0.018 0.027
F 0.75 1 0.030 0.039
F1 1.15 1.70 0.045 0.067
F2 1.15 1.70 0.045 0.067
G 4.95 5.20 0.195 0.205
G1 2.4 2.7 0.094 0.106
H 10 10.4 0.393 0.409
L2 16 Typ. 0.63 Typ.
L3 28.6 30.6 1.126 1.205
L4 9.8 10.6 0.386 0.417
L5 2.9 3.6 0.114 0.142
L6 15.9 16.4 0.626 0.646
L7 9.00 9.30 0.354 0.366
Dia. 3.00 3.20 0.118 0.126
H
A
B
Dia
L7
L6
L5
F1
F2
F
D
E
L4
G1
G
L2
L3
STPS2045C Ordering information
Doc ID 3506 Rev 6 9/10
3 Ordering information
4 Revision history
Table 9. Ordering information
Order code Marking Package Weight Base qty Delivery mode
STPS2045CT STPS2045CT TO-220AB 2.23 g 50 Tube
STPS2045CR STPS2045CR I2PAK 1.49 g 50 Tube
STPS2045CFP STPS2045CFP TO-220FPAB 2.0 g 50 Tube
STPS2045CG STPS2045CG D2PAK 1.48 g 50 Tube
STPS2045CG-TR STPS2045CG 1000 Tape and reel
Table 10. Document revision history
Date Revision Changes
05-Oct-2004 4F Last update
01-Dec-2004 5 Figure 16 (I2PAK Package Mechanical Data):
references b1 and b2 changed from 1.17mm to 1.70mm.
05-Feb-2010 6 Updated Ta bl e 2 (removed voltage). Updated ECOPACK
statement. Updated Table 6.: TO-220AB dimensions.
STPS2045C
10/10 Doc ID 3506 Rev 6
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