Page 1
®
STPS40L45CT/CW
LOW DROP POWER SCHOTTKY RECTIFIER
MAIN PRODUCTS CHARACTERISTICS
I
F(AV)
V
RRM
2x20A
45 V
Tj (max) 150 °C
(max) 0.49 V
V
F
FEATURES AND BENEFITS
LOW FORWARD VOLTAGE DROP MEANING
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VERY SMALL CONDUCTION LOSSES
LOW DYNAMIC LOSSES AS A RESULT OF
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THE SCHOTTKY BARRIER
AVALANCHE RATED
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DESCRIPTION
Dual center tap Schottky barrier rectifier designed
for highfrequencySwitchedModePowerSupplies
and DC to DC converters.
Packaged in TO-220ABand TO-247 this device is
intended for use in low voltage, high frequency
inverters, free-wheeling and polarity protection
applications.
A1
A2
A1
TO-220AB
STPS40L45CT
K
A2
K
A2
K
A1
TO-247
STPS40L45CW
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
Tj
dV/dt
dPtot
*:
Repetitive peak reverse voltage
RMS forward current
Average forward current Tc = 130°C
Surge non repetitive forward current tp = 10 ms Sinusoidal
Repetitive peak reverse current tp = 2 µs square F = 1kHz
Non repetitive peak reverse current tp = 100 µs square
Storage temperature range
Maximum operating junction temperature *
Critical rate of rise of reverse voltage
<
dTj Rth j a
November 1999 - Ed: 1
Per diode
δ = 0.5
Per device
thermal runawaycondition for a diode on its own heatsink
−1()
45 V
30 A
20
40
230 A
2A
3A
- 65 to + 150 °C
150 °C
10000 V/µs
A
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STPS40L45CT/CW
THERMAL RESISTANCES
Symbol Parameter Value Unit
R
R
th (j-c)
th(c)
Junction to case
Per diode
Total
Coupling
1.5
°C/W
0.8
0.1 °C/W
When the diodes 1 and 2 are used simultaneously :
∆ Tj(diode 1) = P(diode1) x R
(Per diode) + P(diode 2) x R
th(j-c)
th(c)
STATIC ELECTRICAL CHARACTERISTICS (per diode)
Symbol Parameter Tests Conditions Min. Typ. Max. Unit
*
I
R
V
F
Reverse leakage current
*
Forward voltage
drop
Tj = 25°C V
R=VRRM
Tj = 100°C
Tj=25°CI
Tj = 125°C I
Tj = 25°C I
Tj = 125°C I
=20A
F
=20A
F
=40A
F
=40A
F
40 130 mA
0.42 0.49
0.6 0.7
0.8 mA
0.53 V
0.69
Pulse test:*tp=380µs, δ <2%
To evaluate the conduction losses use the following equation :
P=0.28xI
F(AV)
+ 0.0105 I
F2(RMS)
Fig. 1: Average forward power dissipation versus
average forward current (per diode).
PF(av)(W)
16
14
12
10
8
6
4
2
0
0 2 4 6 81012141618202224
δ = 0.05
2/5
δ = 0.1
δ = 0.2
IF(av) (A)
δ = 0.5
δ
=tp/T
δ = 1
T
tp
Fig. 2: Average forward current versus ambient
temperature (δ = 0.5, per diode)
IF(av)(A)
22
20
18
16
14
12
10
8
6
4
2
0
0 25 50 75 100 125 150
δ
=tp/T
T
tp
Rth(j-a)=Rth(j-c)
Rth(j-a)=15°C/W
Tamb(°C)
Page 3
STPS40L45CT/CW
Fig. 3: Non repetitive surge peak forward current
versus overload duration (maximum values, per
diode).
IM(A)
250
225
200
175
150
125
Tc=25°C
100
75
IM
50
25
0
1E-3 1E-2 1E-1 1E+0
δ=0.5
t
t(s)
Tc=75°C
Tc=125°C
Fig. 5: Reverse leakage current versus reverse
voltage applied (typical values, per diode).
IR(mA)
1E+3
1E+2
1E+1
1E+0
Tj=150°C
Tj=125°C
Tj=75°C
Fig. 4: Relative variation of thermal impedance
junction to case versus pulse duration.
Zth(j-c)/Rth(j-c)
1.0
0.8
δ = 0.5
0.6
0.4
δ = 0.2
δ = 0.1
T
0.2
0.0
1E-4
Single pulse
1E-3 1E-2 1E-1 1E+0
tp(s)
δ
=tp/T
tp
Fig. 6: Junction capacitance versus reverse
voltage applied (typical values, per diode).
C(nF)
10.0
F=1MHz
Tj=25°C
1.0
1E-1
1E-2
0 5 10 15 20 25 30 35 40 45
Tj=25°C
VR(V)
Fig. 7: Forward voltage drop versus forward
current (maximum values, per diode).
IFM(A)
1000
100
10
1
0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6
Tj=125°C
Typical values
Tj=150°C
Tj=75°C
Tj=25°C
VFM(V)
0.1
VR(V)
1
10 100
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Page 4
STPS40L45CT/CW
PACKAGE MECHANICAL DATA
TO-220AB
DIMENSIONS
L2
F2
F1
F
G1
H2
Dia
G
L5
L9
L6
L4
REF.
A
C
A 4.40 4.60 0.173 0.181
Millimeters Inches
Min. Max. Min. Max.
C 1.23 1.32 0.048 0.051
L7
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
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.
L4 13 14 0.511 0.551
M
E
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
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Cooling method : C
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Recommended torque value : 0.55m.N
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Maximum torque value : 0.70 m.N
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Page 5
PACKAGE MECHANICAL DATA
TO-247
STPS40L45CT/CW
DIMENSIONS
V
REF.
Millimeters Inches
Min. Typ. Max. Min. Typ. Max.
V
Dia.
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
H
A
F2 2.00 0.078
F3 2.00 2.40 0.078 0.094
L5
F4 3.00 3.40 0.118 0.133
G 10.90 0.429
L
L4L2
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
F1
V2
F(x3)
G
= =
F4
F3
F2
L3
L1
D
ME
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
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Cooling method : C
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Recommended torque value : 0.8m.N
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Maximum torque value : 1.0m.N
Ordering type Marking Package Weight Base qty Delivery mode
STPS40L45CT STPS40L45CT TO-220AB 2g 50 Tube
STPS40L45CW STPS40L45CW TO-247 4.4g 30 Tube
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Epoxy meets UL94,V0
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