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(R)
STPS20120D
POWER SCHOTTKY RECTIFIER
Table 1: Main Product Characteristics IF(AV) VRRM Tj (max) VF (typ) FEATURES AND BENEFITS

20 A 120 V 175C 0.54 V
A
K
K
High junction temperature capability Avalanche rated Low leakage current Good trade-off between leakage current and forward voltage drop
K
A
DESCRIPTION Single Schottky rectifier suited for high frequency Switch Mode Power Supply. Packaged in TO-220AC, 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.
TO-220AB STPS20120D
Table 2: Order Code Part Number STPS20120D
Marking STPS20120D
Table 3: Absolute Ratings (limiting values) Symbol VRRM IF(RMS) IF(AV) IFSM PARM Tstg Tj Parameter Repetitive peak reverse voltage RMS forward voltage Average forward current Surge non repetitive forward current Repetitive peak avalanche power Storage temperature range Maximum operating junction temperature * = 0.5 Tc = 130C Value 120 30 20 200 8600 -65 to + 175 175 Unit V A A A W C C
tp = 10ms sinusoidal tp = 1s Tj = 25C
1 dPtot * : --------------- > ------------------------- thermal runaway condition for a diode on its own heatsink dTj Rth ( j - a )
February 2004
REV. 1
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STPS20120D
Table 4: Thermal Parameters Symbol Rth(j-c) Junction to case Parameter Value 2.2 Unit C/W
Table 5: Static Electrical Characteristics Symbol IR * Parameter Reverse leakage current Tests conditions Tj = 25C Tj = 125C Tj = 25C Tj = 125C VF ** Forward voltage drop Tj = 25C Tj = 125C Tj = 25C Tj = 125C
Pulse test: * tp = 5 ms, < 2% ** tp = 380 s, < 2%
Min.
Typ
Max. 20
Unit A mA
VR = VRRM
3
10 0.7
IF = 5A
0.54
0.58 0.8 V
IF = 10A
0.62
0.66 0.93
IF = 20A
0.72
0.76
To evaluate the conduction losses use the following equation: P = 0.56 x IF(AV) + 0.010 IF (RMS)
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STPS20120D
Figure 1: Average forward power dissipation versus average forward current
PF(AV)(W)
28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 0 2 4 6 8 10 12 14 16 18 10 8
Rth(j-a)=15C/W
Figure 2: Average forward current versus ambient temperature ( = 0.5)
IF(AV)(A)
22
Rth(j-a)=Rth(j-c)
= 0.05
= 0.1
= 0.2
= 0.5
20 18 16 14
=1
12
T
6 4
T
IF(AV)(A)
=tp/T
20 22 24
tp
26
2 0 0
=tp/T
25
tp
50
Tamb(C)
75 100 125 150 175
Figure 3: Normalized avalanche derating versus pulse duration
PARM(tp) PARM(1s)
1
power
Figure 4: Normalized avalanche derating versus junction temperature
PARM(tp) PARM(25C)
1.2 1
power
0.1
0.8 0.6 0.4 0.2
0.01
0.001 0.01 0.1 1
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)
IM(A)
140 120 100 80 60 40
Tc=125C
IM
Figure 6: Relative variation of thermal impedance junction to ambient versus pulse duration
Zth(j-c)/Rth(j-c)
1.0 0.9 0.8 0.7
Tc=25C
0.6 0.5
= 0.5
Tc=75C
0.4 0.3 0.2 0.1 0.0 1.E-02 1.E-01 1.E+00 1.E-03 1.E-02 1.E-01
= 0.2 = 0.1 Single pulse
t
T
20 0 1.E-03
=0.5
t(s)
tp(s)
=tp/T
tp
1.E+00
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STPS20120D
Figure 7: Reverse leakage current versus reverse voltage applied (typical values)
IR(mA)
1.E+02 1.E+01 1.E+00 1.E-01
Tj=75C
Figure 8: Junction capacitance versus reverse voltage applied (typical values)
C(pF)
1000
F=1MHz VOSC=30mVRMS Tj=25C
Tj=150C Tj=125C Tj=100C
100
1.E-02 1.E-03
Tj=50C
Tj=25C
1.E-04 1.E-05 0 10 20 30 40 50
VR(V)
60 70 80 90 100 110 120
VR(V)
10 1 10 100
Figure 9: Forward voltage drop versus forward current
IFM(A)
100
Tj=125C (maximum values)
Tj=125C (typical values)
Tj=25C (maximum values)
10
VFM(V)
1 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6
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STPS20120D
Figure 10: TO-220AC Package Mechanical Data DIMENSIONS REF. A C D
L7
Millimeters Min. Max. 4.60 1.32 2.72 0.70 0.88 1.70 5.15 10.40 14.00 2.95 15.75 6.60 3.93 3.85 4.40 1.23 2.40 0.49 0.61 1.14 4.95 10.00 13.00 2.65 15.25 6.20 3.50 3.75
Inches Min. 0.173 0.048 0.094 0.019 0.024 0.044 0.194 0.393 0.511 0.104 0.600 0.244 0.137 0.147 Max. 0.181 0.051 0.107 0.027 0.034 0.066 0.202 0.409 0.551 0.116 0.620 0.259 0.154 0.151
H2 C L5 OI L6 L2 D
A
E F F1 G H2 L2 L4 L5
L9 F1 L4
16.40 typ.
0.645 typ.
F G
M E
L6 L7 L9 M Diam. I
2.6 typ.
0.102 typ.
Table 6: Ordering Information Ordering type STPS20120D

Marking STPS20120D
Package TO-220AC
Weight 1.90 g
Base qty 50
Delivery mode Tube
Epoxy meets UL94, V0 Cooling method: by conduction (C) Recommended torque value: 0.55 m.N. Maximum torque value: 0.70 m.N.
Table 7: Revision History Date 18-Feb-2005 Revision 1 First issue. Description of Changes
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STPS20120D
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. The ST logo is a registered trademark of STMicroelectronics. All other names are the property of their respective owners (c) 2005 STMicroelectronics - All rights reserved STMicroelectronics group of companies Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America www.st.com
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