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STPS1545C
Power Schottky rectifier
Main product characteristics
IF(AV) VRRM Tj (max) VF(max)
A1 K A2
2 x 7.5 A 45 V
175 C 0.57 V
Features and Benefits

A2 K A1
Very small conduction losses Negligible switching losses Extremely fast switching Avalanche capability specified
K
TO-220AB STPS1545CT
Description
Dual center tap Schottky rectifier suited for SwitchMode Power Supply and high frequency DC to DC converters. Packaged either in TO-220AB, D2PAK or I2PAK, this device is especially intended for use in low voltage, high frequency inverters, free wheeling and polarity protection applications.
A2 A1 A1 A2 K
D2PAK STPS1545CG
I2PAK STPS1545CR
March 2007
Rev 6
1/9
www.st.com 9
Characteristics
STPS1545C
1
Characteristics
Table 1.
Symbol VRRM IF(RMS) IF(AV) IFSM IRRM IRSM PARM Tstg Tj dV/dt
1.
dPtot --------------dTj
Absolute Ratings (limiting values)
Parameter Repetitive peak reverse voltage RMS forward voltage Average forward current = 0.5 Surge non repetitive forward current Peak repetitive reverse current Non repetitive peak reverse current Repetitive peak avalanche power Storage temperature range Maximum operating junction temperature Critical rate of rise of reverse voltage
(1)
Value 45 20 Tc = 157 C Per diode tp = 10 ms Sinusoidal tp = 2 s square F = 1 kHz tp = 100 s square tp = 1 s Tj = 25C 7.5 150 1 2 2700 -65 to + 175 175 10000
Unit V A A A A A W C C V/s
<
1 ------------------------Rth ( j - a )
thermal runaway condition for a diode on its own heatsink
Table 2.
Symbol Rth(j-c) Rth(c)
Thermal resistances
Parameter Junction to case Per diode Total Coupling Value 3.0 1.7 0.35 Unit C/W
When the diodes 1 and 2 are used simultaneously : Tj(diode 1) = P(diode1) x Rth(j-c)(Per diode) + P(diode 2) x Rth(c) Table 3.
Symbol IR(1)
Static electrical characteristics (per diode)
Parameter Reverse leakage current Test Conditions Tj = 25C Tj = 125C Tj = 125C VR =VRRM IF = 7.5A IF = 15 A IF = 15 A 0.65 Min. Typ. Max. 100 5 0.5 15 0.57 0.84 0.72 V Unit A mA
VF(1)
Forward voltage drop
Tj = 25C Tj = 125C
1. Pulse test: tp = 380 s, < 2%
To evaluate the conduction losses use the following equation: P = 0.42 x IF(AV) + 0.020 IF2(RMS)
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STPS1545
Characteristics
Figure 1.
Average forward power dissipation Figure 2. versus average forward current (per diode)
IF(AV)(A)
9
Average forward current versus ambient temperature ( = 0.5, per diode)
PF(AV)(W)
6 5 4
= 0.1 = 0.05
= 0.2
= 0.5
8 7 6
Rth(j-a)=40C/W
Rth(j-a)=Rth(j-c)
TO-220AB D2PAK
=1
3
Rth(j-a)=15C/W
5 4
2 1
T
3 2
T
IF(AV)(A)
0 0 1 2 3 4 5 6 7
=tp/T
8 9
tp
1 0
=tp/T
0 25
tp
Tamb(C)
50 75 100 125 150 175
10
Figure 3.
Normalized avalanche power derating versus pulse duration
Figure 4.
Normalized avalanche power derating versus junction temperature
PARM(tp) PARM(1s)
1 1.2 1 0.1 0.8 0.6 0.4 0.2 0.001 0.01 0.1 1
PARM(tp) PARM(25C)
0.01
tp(s)
10 100 1000
Tj(C)
0 25 50 75 100 125 150
Figure 5.
Non repetitive surge peak forward current versus overload duration (maximum values, per diode)
Figure 6.
Relative variation of thermal impedance junction to case versus pulse duration
IM(A)
120 100 80
0.6 1.0
Zth(j-c)/Rth(j-c)
0.8
60 40 20 0 1E-3
IM t
TC=50C
= 0.5
TC=100C
0.4
= 0.2 = 0.1
TC=150C
0.2
T
=0.5
t(s)
1E-2 1E-1 1E+0
0.0 1E-4
Single pulse
tp(s)
1E-3 1E-2
=tp/T
1E-1
tp
1E+0
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Characteristics
STPS1545C
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)
IR(A)
5E+4 1E+4
Tj=150C Tj=125C
C(pF)
1000
F=1MHz VOSC=30mVRMS Tj=25C
1E+3
Tj=100C Tj=75C Tj=50C
500
1E+2
1E+1
Tj=25C
200
1E+0
VR(V)
1E-1 0 5 10 15 20 25 30 35 40 45
VR(V)
100 1 2 5 10 20 50
Figure 9.
Forward voltage drop versus forward current (maximum values, per diode)
Figure 10. Thermal resistance junction to ambient versus copper surface under tab (Epoxy printed circuit board, copper thickness: 35 m)
Rth(j-a)(C/W)
80
IFM(A)
100.0
Tj=125C (typical values)
70
Tj=25C
60 50 40
10.0
Tj=125C
30
1.0
20 10
0.1 0.0 0.2 0.4 0.6
S(Cu)(cm)
0 2 4 6 8 10 12 14 16 18 20
VFM(V)
0.8 1.0 1.2 1.4 1.6
0
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STPS1545
Package Information
2
Package Information

Epoxy meets UL94, V0 Cooling method: by conduction (C) Recommended torque value: 0.55 Nm Maximum torque value: 0.70 Nm
Figure 11. D2PAK dimensions
Dimensions Ref Millimeters Min. A
A E L2
Inches Min. 0.173 0.098 0.001 0.027 0.045 0.017 0.048 0.352 0.393 0.192 0.590 0.050 0.055 0.094 Max. 0.181 0.106 0.009 0.037 0.067 0.024 0.054 0.368 0.409 0.208 0.624 0.055 0.069 0.126
Max. 4.60 2.69 0.23 0.93 1.70 0.60 1.36 9.35 10.40 5.28 15.85 1.40 1.75 3.20
4.40 2.49 0.03 0.70 1.14 0.45 1.23 8.95 10.00 4.88 15.00 1.27 1.40 2.40
A1
C2
A2 B
D
L L3 A1 B2 B G A2
B2 C C2
C R
D E G L
M
*
V2
L2 L3 M R V2
* FLAT ZONE NO LESS THAN 2mm
0.40 typ. 0 8
0.016 typ. 0 8
Figure 12. Footprint (dimensions in millimeters)
16.90
10.30 1.30
5.08
8.90
3.70
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Package Information Figure 13. TO-220AB dimensions
Dimensions Ref Millimeters Min. A
H2 Dia L5 L7 L6 L2 F2 F1 L9 L4 F G1 G M E D C A
STPS1545C
Inches Min. 0.173 0.048 0.094 0.019 0.024 0.044 0.044 0.194 0.094 0.393 Max. 0.181 0.051 0.107 0.027 0.034 0.066 0.066 0.202 0.106 0.409
Max. 4.60 1.32 2.72 0.70 0.88 1.70 1.70 5.15 2.70 10.40
4.40
C D E F F1 F2 G G1 H2 L2 L4 L5 L6 L7 L9 M Diam.
1.23
2.40 0.49 0.61 1.14 1.14 4.95 2.40 10
16.4 typ. 13 2.65 15.25 6.20 3.50 14 2.95 15.75 6.60 3.93
0.645 typ. 0.511 0.104 0.600 0.244 0.137 0.551 0.116 0.620 0.259 0.154
2.6 typ. 3.75 3.85
0.102 typ. 0.147 0.151
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STPS1545 Figure 14. I2PAK dimensions
Package Information
Dimensions Ref Min.
A E L2 c2
Millimeters Typ. 4.60 2.69 0.93 1.17 1.17 0.60 1.36 9.35 2.70 10.4 13.6 3.78 1.40 Max. 0.173 0.098 0.028 0.044 0.044 0.018 0.048 0.352 0.094 0.394 0.516 0.137 0.050 Min. 0.181 0.106 0.037 0.046 0.046 0.024 0.054 0.368 0.106 0.409 0.535 0.149 0.055
Inches Typ. A A1 b b1 b2 c c2 D e E L L1 L2 Max. 4.40 2.49 0.70 1.14 1.14 0.45 1.23 8.95 2.40 10.0 13.1 3.48 1.27
A A1 b b1
4.40 2.49 0.70 1.14 1.14 0.45 1.23 8.95 2.40 10.0 13.1 3.48 1.27
D
b2 c
L1 L b1
A1
c2 D e E
b e e1
c
L L1 L2
In order to meet environmental requirements, ST offers these devices in ECOPACK(R) packages. These packages have a lead-free second level interconnect. The category of second level interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label. ECOPACK is an ST trademark. ECOPACK specifications are available at: www.st.com.
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Ordering Information
STPS1545C
3
Ordering Information
Delivery mode Tube Tube Tape & reel Tube
Ordering type STPS1545CT STPS1545CG STPS1545CG-TR STPS1545CR
Marking STPS1545CT STPS1545CG STPS1545CG STPS1545CR
Package TO-220AB D PAK D PAK I2PAK
2 2
Weight 2.23 g 1.48 g 1.48 g 1.49 g
Base qty 50 50 1000 50
4
Revision history
Date Jul-2003 21-Mar-2007 Revision 5F 6 Last release. Removed ISOWATT and TO-220FPAB packages. Description of Changes
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STPS1545
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