Page 1
®
LOW DROP OR-ing POW ER SCHOTTKY DIOD E
MAJOR PRODUCT CHARACTE RISTICS
I
F(AV)
V
RRM
Tj (max) 150°C
V
(max) 0.33 V
F
FEATURES AND BENEFITS
VERY LOW F O RWARD VO LTAGE DROP FOR
LESS POWER DISSIPATION AND REDUCED
HEATSINK SIZE
REVERSE VOLTAGE SUITED TO OR-ing OF
3V, 5V and 12V RA ILS
DESCR IPT ION
2 x 20 A
15 V
STPS40L15CW/CT
A1
K
A2
A2
K
A1
A1
A2
K
Dual center tap schottky rectifier packaged in
TO-220AB and TO-247, this device is especially
intended for use as OR-ing diode in fault tolerant
TO-220AB
STPS40L15CT
TO-247
STPS40L15CW
power supply equipments.
ABSOLUTE RATINGS (limiting values, per diode)
Symbol Parameter Value Unit
V
RRM
I
F(RMS)
I
F(AV)
I
FSM
I
RRM
I
RSM
T
stg
T
j
dV/dt
dPtot
* :
dTj
Repetitive peak reverse voltage
RMS forward current
Average forward current Tcase = 140°C
δ = 1
Surge non repetitive forward current tp = 10 ms Sinusoidal
Peak repetitive reverse current tp = 2 µs F = 1kHz
Non repetitive peak reverse current tp = 100 µs
Storage temperature range
Maximum operating junction temperature *
Critical rate of rise of reverse voltage
<
1
Rth(j−a
thermal runaway condition for a diode on its own heatsink
)
Total
Per diode
15 V
30 A
40 A
20
310 A
2A
3A
- 65 to + 150 °C
150 °C
10000 V/µs
November 1999 - Ed: 4A
1/5
Page 2
STPS40L15CW/CT
THERMA L RE SISTA NC ES
Symbol Parameter Value Unit
(j-c)
R
R
th
th (c)
Junction to case
STATIC ELECTRICAL CHARACTE RISTICS (Per diode)
Symbol Parameter Tests Conditions Min. Typ. Max. Unit
Per diode 1.6 °C/W
Total 0.85
Coupling 0.1 °C/W
*
I
R
V
F
Reverse leakage
current
*
Forward voltage drop Tj = 25°CI
Tj = 25°CV
Tj = 100°C
Tj = 25°CI
Tj = 125°C I
= V
R
= 19 A
F
= 40 A
F
= 19 A
F
Tj = 125°C IF = 40 A
Pulse test : * tp = 380 µs, δ < 2%
To evaluate the conduction losses use the following equation :
P = 0.18 x I
Fig. 1: Average forward power dis sipation versus
average forward current (per diode).
PF(av)(W)
8
7
6
5
4
3
2
1
0
0 2 4 6 8 10121416182022
δ = 0.05
F(AV)
+ 0.008 I
δ = 0.1
IF(av) (A)
F2(RMS )
δ = 0.2
δ = 0.5
δ
=tp/T
T
δ = 1
Fig. 2: Average forward current versus ambient
temperature (δ=1, per diode).
IF(av)(A)
22
20
18
16
14
12
10
8
6
4
tp
2
0
0 25 50 75 100 125 150
RRM
=tp/T
δ
6mA
200 500
0.41 V
0.52
0.28 0.33
0.42 0.50
Rth(j-a)=Rth(j-c)
Rth(j-a)=15°C/W
T
tp
Tamb(°C)
2/5
Page 3
STPS40L15CW/CT
Fig. 3: Non repetitive surge peak forward current
versus overload duration (maximum values per
diode).
IM(A)
250
200
150
100
I
M
50
0
1E-3 1E-2 1E-1 1E+0
t
δ
=0.5
t(s)
Tc=50°C
Tc=75°C
Tc=110°C
Fig. 5: Reverse leakage current versus reverse
voltage applied (typical values per diode) .
IR(mA)
5E+2
1E+2
Tj=100°C
Fig. 4: Relative variation of thermal impedance
junction to case versus pulse duration (per diode).
Zth(j-c)/Rth(j-c)
1.0
0.8
δ = 0.5
0.6
0.4
δ = 0.2
δ = 0.1
0.2
0.0
1.0E-4 1.0E-3 1.0E-2 1.0E-1 1.0E+0
Single pulse
tp (s)
δ
=tp/T
T
tp
Fig. 6: Junction capacitance versus reverse
voltage applied (typical values per diode).
C(nF)
5.0
F=1MHz
Tj=25°C
1E+1
1E+0
1E-1
0246810121416
Tj=25°C
VR(V)
Fig. 7: Forward voltage drop versus forward
current (typical values per diode) .
IFM(A)
200.0
100.0
10.0
Tj=150°C
Tj=25°C
Tj=125°C
Tj=75°C
1.0
VFM(V)
0.1
0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6
1.0
VR(V)
0.1
12 51020
Fig. 8: Forward voltage drop versus forward
current (typical maximum per diode).
IFM(A)
200
Tj=100°C
100
10
1
0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8
VFM(V)
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Page 4
STPS40L15CW/CT
PACKAGE MECHANICAL DAT A
TO-220AB
REF.
DIMENSIONS
Millimeters Inches
H2
Dia
L5
L6
L2
F2
F1
F
G1
G
L9
L4
Cooling method: C
Recommended torque value: 0.55 m.N
Maximum torque value: 0.70 m.N
A
C
L7
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
Min. Max. Min. Max.
D
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.
M
E
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
4/5
Page 5
PACKAGE MECHANICAL DAT A
TO-247
V
V
H
L5
L
F2
F4
L1
F3
L3
F1
V2
F(x3)
G
= =
Dia.
L4L2
D
ME
A
STPS40L15CW/CT
DIMENSIONS
REF.
A 4.85 5.15 0.191 0.203
D 2.20 2.60 0.086 0.102
E 0.40 0.80 0.015 0.031
F 1.00 1.40 0.039 0.055
F1 3.00 0.118
F2 2.00 0.078
F3 2. 00 2.40 0.078 0.094
F4 3. 00 3.40 0.118 0.133
G 10.90 0.429
H 15.45 15.75 0.608 0.620
L 19.85 20.15 0.781 0.793
L1 3.70 4.30 0.145 0.169
L2 18.50 0.728
L3 14.20 14.80 0.559 0.582
L4 34.60 1.362
L5 5.50 0.216
M 2.00 3.00 0.078 0.118
V5° 5°
V2 60° 60°
Dia. 3.55 3.65 0.139 0.143
Millimeters Inches
Min. Typ. Max. Min. Typ. Max.
Cooling method: C
Recommended torque value: 0.8 m.N
Maximum torque value: 1.0 m.N
Ordering type Marking Package Weight Base qty Delivery mode
STPS40L15CW STPS40L15CW TO-247 4.4 g. 30 Tube
STPS40L15CT STPS40L15CT TO-220AB 2g 50 Tube
Epoxy meets UL94,V0
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