STPS20L45C
Low drop power Schottky rectifier
Datasheet - production data
K
A1
A2
K
A1
K
A2
TO-220AB
K
K
A1
K
A2
TO-220FPAB
A1
A2
D²PAK
A1
A2
Features
Low forward voltage drop meaning very small conduction losses
Low switching losses allowing high frequency operation
Insulated package: TO-220FPAB
Insulating voltage = 2000 V
RMS
sine
Avalanche capability specified
ECOPACK ® 2 compliant component for
D²PAK on demand
Description
Dual center tap Schottky rectifiers designed for high frequency switched mode power supplies and DC to DC converters.
These devices are intended for use in low voltage, high frequency inverters, free-wheeling and polarity protection applications.
Table 1: Device summary
Symbol Value
I
F(AV)
V
RRM
V
F
(typ.)
T j
(max.)
2 x 10 A
45 V
0.44 V
150 °C
October 2016 DocID8001 Rev 5
This is information on a product in full production.
1/15 www.st.com
Characteristics
1 Characteristics
STPS20L45C
Table 2: Absolute ratings (limiting values, per diode, at 25 °C, unless otherwise specified)
Symbol Parameter Value Unit
V
RRM
Repetitive peak reverse voltage
I
F(RMS)
Forward rms current
I
I
F(AV)
FSM
Average forward current
δ = 0.5, square wave
TO-220AB /
D²PAK
TO-220FPAB
Surge non repetitive forward current
T
T
T
C
C
C
= 135 °C
= 130 °C
= 115 °C
Per diode
Per device
Per diode
T
C
= 100 °C Per device t p
= 10 ms sinusoidal
45
30
10
20
10
20
180
V
A
A
A
P
ARM
Repetitive peak avalanche power t p
= 10 µs,
T j
= 125 °C
285 W
T stg
T j
Storage temperature range
Maximum operating junction temperature (1)
-65 to +150
150
°C
Notes:
(1)
(dP tot
/dT j
) < (1/R th(j-a)
) condition to avoid thermal runaway for a diode on its own heatsink.
Symbol
Table 3: Thermal parameters
Parameter Max. value Unit
R th(j-c)
Junction to case
TO-220FPAB
TO-220AB
D²PAK
Per diode
Total
Per diode
Total
4.5
3.5
2.2
1.3
2.5
°C/W
R th(c)
Coupling
TO-220FPAB
TO-220AB
D²PAK
When the diodes 1 and 2 are used simultaneously:
ΔT j (diode1)
= P
(diode1)
x R th(j-c)
(per diode) + P
(diode2)
x R th(c)
0.3
2/15 DocID8001 Rev 5
STPS20L45C
Symbol
I
R
(1)
V
F
(1)
Characteristics
Table 4: Static electrical characteristics (per diode)
Parameter Test conditions Min. Typ. Max. Unit
Reverse leakage current
Forward voltage drop
T j
= 25 °C
T j
= 125 °C
T j
= 25 °C
T j
= 125 °C
T j
= 25 °C
T j
= 125 °C
V
R
= V
RRM
I
F
= 10 A
I
F
= 20 A
-
-
-
-
-
65
0.2
130
0.55
0.44 0.5
0.73
0.62 0.72 mA
V
Notes:
(1)
Pulse test: t p
= 380 µs, δ < 2%
To evaluate the conduction losses, use the following equation:
P = 0.28 x I
F(AV)
+ 0.022 x I
F
2
(RMS)
DocID8001 Rev 5 3/15
Characteristics
1.1 Characteristics (curves)
Figure 1: Average forward power dissipation versus average forward current (per diode)
STPS20L45C
Figure 2: Average forward current versus ambient temperature (δ = 0.5, per diode)
8
PF(AV)(W)
7
6
5
4
3
2
1
0
0
δ = 0.05
2
δ = 0.1
δ = 0.2
4
IF(AV) (A)
6 8
δ = 0.5
δ = 1
10
δ
= tp/T
12
T tp
14
Figure 3: Normalized avalanche power deratings versus pulse duration (T j
= 125 °C)
1
P
ARM
(tp)
P
ARM
(10 µs)
9
8
7
6
12
11
10
2
1
0
5
4
3
IF(AV)(A)
δ = tp/T
T
0 2 5
Rth(j-a) = 15 °C/W tp
5 0
Rth(j-a) = Rth(j-c)
Tamb(°C)
7 5 100
TO-220AB
TO-220FPAB
125 150
Figure 4: Reverse leakage current versus reverse voltage applied (typical values, per diode)
IR(mA)
2E+2
1E+2 Tj = 150 °C
1E+1
0.1
Tj = 125 °C
Tj = 75 °C
1E+0
1E-1
0.01
Tj = 25 °C
1E-2
0.001
1 10 100 1000
1.0
Figure 5: Relative variation of thermal impedance junction to case versus pulse duration
(TO-220AB, D²PAK)
Zth(j-c)/Rth(j-c)
1E-3
0 5 10 15 20
VR(V)
25 30 35 40 45
Figure 6: Relative variation of thermal impedance junction to case versus pulse duration
(TO-220FPAB)
Zth(j-c)/Rth(j-c)
1.0
0.8
0.6
δ = 0.5
0.4
δ = 0.2
δ = 0.1
0.2
Single pulse
0.0
1E-3 1E-2
0.8
0.6
δ = 0.5
1E-1
δ = tp/T
T
0.4
0.2
δ = 0.2
δ = 0.1
tp
1E+0
0.0
1E-3
Single pulse
1E-2 1E-1
δ = tp/T
1E+0
T tp
1E+1
4/15 DocID8001 Rev 5
STPS20L45C
Figure 7: Junction capacitance versus reverse voltage applied (typical values, per diode)
C(pF)
2000
1000
F = 1 MHz
V
OSC
= 30 mV
Tj = 25 °C
RMS
Characteristics
Figure 8: Forward voltage drop versus forward current (maximum values, per diode)
100
1 2 5
VR(V)
10 20 50
Figure 9: Thermal resistance junction to ambient versus copper surface under tab
80
R th(j-a)
(°C/W)
30
20
10
0
0
70
60
50
40
5 10 15
Epoxy printed board FR4, eCU= 35 µm
S
Cu
(cm²)
20 25 30 35 40
DocID8001 Rev 5 5/15
Package information
2 Package information
STPS20L45C
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.
Cooling method: by conduction (C)
Epoxy meets UL 94,V0
Recommended torque value: 0.55 N·m for TO-220AB
Maximum torque value: 0.7 N·m for TO-220AB
6/15 DocID8001 Rev 5
STPS20L45C
2.1 TO-220AB package information
Figure 10: TO-220AB package outline
Package information
DocID8001 Rev 5 7/15
Package information
Ref.
L
L1
L20
L30
θP
Q e1
F
H1
J1
D
D1
E e
A b b1 c
10.00
2.40
4.95
1.23
6.20
2.40
13.00
3.50
Table 5: TO-220AB package mechanical data
Dimensions
Millimeters
Min.
4.40
0.61
1.14
0.48
15.25
Max.
4.60
0.88
1.70
0.70
15.75
Min.
0.173
0.240
0.045
0.019
0.600
Inches
STPS20L45C
Max.
0.181
0.035
0.067
0.028
0.620
1.27 typ. 0.050 typ.
10.40
2.70
5.15
1.32
6.60
2.72
14.00
3.93
0.394
0.094
0.195
0.048
0.244
0.094
0.512
0.138
0.409
0.106
0.203
0.052
0.260
0.107
0.551
0.155
16.40 typ.
28.90 typ.
0.646 typ.
1.138 typ.
3.75
2.65
3.85
2.95
0.148
0.104
0.152
0.116
8/15 DocID8001 Rev 5
STPS20L45C
2.2 TO-220FPAB package information
Figure 11: TO-220FPAB package outline
Package information
DocID8001 Rev 5 9/15
Package information
Ref.
L4
L5
L6
L7
G1
H
L2
L3
Dia
F
F1
F2
G
A
B
D
E
28.60
9.8
2.9
15.9
9
3
Table 6: TO-220FPAB package mechanical data
Dimensions
Millimeters Inches
STPS20L45C
Min.
4.40
2.5
2.5
0.45
0.75
1.15
1.15
4.95
2.4
10
Max.
4.60
2.7
2.75
0.70
1
1.70
1.70
5.2
2.7
10.4
Min.
0.173
0.098
0.098
0.018
0.030
0.045
0.045
0.195
0.094
0.394
Max.
0.181
0.106
0.108
0.028
0.039
0.067
0.067
0.205
0.106
0.409
16 typ. 0.63 typ.
30.6
10.6
3.6
16.4
9.3
3.2
1.126
0.386
0.114
0.626
0.354
0.118
1.205
0.417
0.142
0.646
0.366
0.126
10/15 DocID8001 Rev 5
STPS20L45C
2.3 D²PAK package information
Figure 12: D²PAK package outline
Package information
This package drawing may slightly differ from the physical package. However, all the specified dimensions are guaranteed.
DocID8001 Rev 5 11/15
Package information
Ref. e e1
H
J1
D2
E
E1
E2 c c2
D
D1
A
A1 b b2
L
L1
L2
R
V2
4.88
15.00
2.49
1.90
1.27
1.30
Min.
4.36
0.00
0.70
1.14
0.38
1.19
8.60
6.90
1.10
10.00
8.10
6.85
Table 7: D²PAK package mechanical data
Dimensions
Millimeters
Max.
4.60
0.25
0.93
1.70
0.69
1.36
9.35
8.00
1.50
10.55
8.90
7.25
Min.
0.172
0.000
0.028
0.045
0.015
0.047
0.339
0.272
0.043
0.394
0.319
0.266
2.54 typ.
5.28
15.85
2.90
2.79
1.65
1.78
0.190
0.591
0.097
0.075
0.049
0.050
0.4 typ.
0° 8° 0°
Inches
0.100
0.015
STPS20L45C
0.205
0.624
0.112
0.110
0.065
0.070
8°
Max.
0.181
0.010
0.037
0.067
0.027
0.053
0.368
0.311
0.060
0.415
0.346
0.282
12/15 DocID8001 Rev 5
STPS20L45C Package information
Figure 13: D²PAK recommended footprint (dimensions in mm)
DocID8001 Rev 5 13/15
Ordering information
3 Ordering information
STPS20L45C
Order code
STPS20L45CT
STPS20L45CFP
Table 8: Ordering information
Marking Package Weight Base qty. Delivery mode
STPS20L45CT TO-220AB 1.95 g 50 Tube
STPS20L45CFP TO-220FPAB 1.7 g
STPS20L45CG-TR STPS20L45CG D²PAK 1.38 g
50
1000
Tube
Tape and reel
4 Revision history
Date
Table 9: Document revision history
Revision Changes
Jul-2003
22-Mar-2007
06-Oct-2016
3C
4
5
Last release.
Removed ISOWATT and TO-247 packages.
Updated cover page.
Updated Section 3: "Characteristics"
and Section 3.1:
"Characteristics (curves)"
and Section 5: "Ordering information"
and Section 4.4: "D²PAK package information" .
14/15 DocID8001 Rev 5
STPS20L45C
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DocID8001 Rev 5 15/15
