Bulletin PD-21037 rev. A 02/07
40L15CTSPbF
40L15CT-1PbF
SCHOTTKY RECTIFIER
2 x 20 Amps
I
F(AV)
= 40Amp
V
R
= 15V
Major Ratings and Characteristics
Characteristics
I
F(AV)
Rectangular
waveform
V
RRM
I
FSM
@ tp = 5
μs
sine
V
F
T
J
@ 19 Apk, T
J
=125°C
(per leg, Typical)
Description/ Features
Units
A
V
A
V
The center tap Schottky rectifier module has been optimized
for ultra low forward voltage drop specifically for the OR-ing of
parallel power supplies. The proprietary barrier technology
allows for reliable operation up to 125 °C junction temperature.
Typical applications are in parallel switching power supplies,
converters, reverse battery protection, and redundant power
subsystems.
125°C T
J
operation (V
R
< 5V)
Center tap module
Optimized for OR-ing applications
Ultra low forward voltage drop
High frequency operation
Guard ring for enhanced ruggedness and long term
reliability
High purity, high temperature epoxy encapsulation for
enhanced mechanical strength and moisture resistance
Lead-Free ("PbF" suffix)
Values
40
15
700
0.25
- 55 to 125
°C
Case Styles
40L15CTSPbF
40L15CT-1PbF
Base
Common
Cathode
2
Base
Common
Cathode
2
1
Anode
2
Common
Cathode
3
1
Anode
Anode
2
Common
Cathode
3
Anode
D
2
PAK
www.irf.com
TO-262
1
40L15CTSPbF, 40L15CT-1PbF
Bulletin PD-21037 rev. A 02/07
Voltage Ratings
Part number
V
R
Max. DC Reverse Voltage (V)
@ T
J
= 100 °C
V
RWM
Max. Working Peak Reverse Voltage (V) @ T
J
= 100 °C
40L15CTSPbF, 40L15CT-1PbF
15
Absolute Maximum Ratings
Parameters
I
F(AV)
Max. Average Forward
Current
I
FSM
E
AS
I
AR
* See Fig. 5
(Per Leg)
(Per Device)
Values
20
40
700
330
10
2
Units
A
Conditions
50% duty cycle @ T
C
= 85°C, rectangular wave form
5μs Sine or 3μs Rect. pulse
Following any rated
load condition and with
10ms Sine or 6ms Rect. pulse rated V
RRM
applied
Max. Peak One Cycle Non-Repetitive
Surge Current (Per Leg) * See Fig. 7
Non-Repetitive Avalanche Energy
(Per Leg)
Repetitive Avalanche Current
(Per Leg)
A
mJ
A
T
J
= 25 °C, I
AS
= 2 Amps, L = 6 mH
Current decaying linearly to zero in 1
μsec
Frequency limited by T
J
max. V
A
= 1.5 x V
R
typical
Electrical Specifications
Parameters
V
FM
Forward Voltage Drop
(Per Leg) * See Fig. 1
Values
Typ. Max.
(1)
-
-
0.25
0.37
-
(1)
-
0.41
0.52
0.33
0.50
10
600
7.6
-
8
2000
-
Units
V
V
V
V
mA
mA
V
mΩ
pF
nH
@ 19A
@ 40A
@ 19A
@ 40A
Conditions
T
J
= 25 °C
T
J
= 125 °C
V
R
= rated V
R
I
RM
Reverse Leakage Current
(Per Leg) * See Fig. 2
T
J
= 25 °C
T
J
= 100 °C
T
J
=
T
J
max.
V
F(TO)
Threshold Voltage
r
t
C
T
L
S
Forward Slope Resistance
Max. Junction Capacitance (Per Leg)
Typical Series Inductance (Per Leg)
0.182
V
R
= 5V
DC
(test signal range 100Khz to 1Mhz) 25°C
Measured lead to lead 5mm from package body
(1) Pulse Width < 300μs, Duty Cycle <2%
dv/dt Max. Voltage Rate of Change
10000
V/
μs
(Rated V
R
)
Thermal-Mechanical Specifications
Parameters
T
J
T
stg
Max. Junction Temperature Range
Max. Storage Temperature Range
Values
-55 to 125
-55 to 150
1.5
0.50
40
2 (0.07)
Min.
Max.
6 (5)
12 (10)
Units
°C
°C
Conditions
R
thJC
Max. Thermal Resistance
Junction to Case
(Per Leg)
R
thCS
Typical Thermal Resistance
Case to Heatsink
R
thJA
Max. Thermal Resistance
Junction to Ambient
wt
T
Approximate Weight
Mounting Torque
Marking Device
°C/W DC operation
* See Fig. 4
°C/W Mounting surface , smooth and greased
Only for TO-220
°C/W DC operation
For D
2
Pak and TO-262
g (oz.)
Kg-cm Non-lubricated threads
(Ibf-in)
Case style D
2
Pak
Case style TO-262
40L15CTS
40L15CT-1
2
www.irf.com
40L15CTSPbF, 40L15CT-1PbF
Bulletin PD-21037 02/07
1000
1000
T = 100°C
J
100
75°C
50°C
Reverse Current - I
R
(mA)
10
25°C
1
Instantaneous Forward Current - I
F
(A)
100
0.1
0
3
6
9
12
15
R
everse Voltage - V
R
(V)
Fig. 2 - Typical Values of Reverse Current
Vs. Reverse Voltage
10000
Junction Capacitance - C
T
(pF)
10
T = 125°C
J
T = 75°C
J
T = 25°C
J
T
J
= 25°C
1000
1
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
100
0
5
10
15
20
Forward Voltage Drop - V
FM
(V)
R
everse Voltage - V
R
(V)
Fig. 1 - Maximum Forward Voltage Drop Characteristics
10
T
hermal Impedanc e Z
thJC
(°C/W)
Fig. 3 - Typical Junction Capacitance
Vs. Reverse Voltage
1
D = 0.75
D = 0.50
D = 0.33
D = 0.25
D = 0.20
P
DM
0.1
S
ingle Pulse
(T
hermal Resistanc e)
Notes:
t
1
t2
1. Duty fac tor D = t 1/ t 2
2. Peak T = P
DM
x Z
thJC
+ T
C
J
0.1
1
10
100
0.01
0.00001
0.0001
0.001
0.01
t 1 , Rectangular Pulse Duration (S onds)
ec
Fig. 4 - Maximum Thermal Impedance Z
thJC
Characteristics
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3
40L15CTSPbF, 40L15CT-1PbF
Bulletin PD-21037 rev. A 02/07
100
Allowa ble Case T
emperature - (°C)
Average Power Loss - (Watts)
95
90
85
80
75
see note ( 2)
14
12
10
8
6
4
2
0
D = 0.20
D = 0.25
D = 0.33
D = 0.50
D = 0.75
R Limit
MS
DC
S
quare wave (D = 0.50)
70
0
4
8
12
16
20
24
0
5
10
15
20
25
30
Average Forward Current - I
F(AV)
(A)
Average Forward Current - I
F(AV)
(A)
Fig. 5 - Maximum Allowable Case Temperature
Vs. Average Forward Current
Non-R
epetitive S
urge Current - I
FSM
(A)
1000
Fig. 6 - Forward Power Loss Characteristics
At Any R
ated Load Condition
And With R
ated V
RRM
Ap plied
Following S
urge
100
10
100
1000
10000
S
quare Wave Pulse Duration - t p (microsec)
Fig. 7 - Maximum Non-Repetitive Surge Current
L
HIGH-S
PEED
S CH
WIT
F
REE-WHEEL
DIODE
40HF 40S
L 02
+
DUT
IR P460
F
R = 25 ohm
g
Vd = 25 Volt
CURRENT
MONIT
OR
Fig. 8 - Unclamped Inductive Test Circuit
(2)
Formula used: T
C
= T
J
- (Pd + Pd
REV
) x R
thJC
;
Pd = Forward Power Loss = I
F(AV)
x V
FM
@ (I
F(AV)
/
D) (see Fig. 6);
Pd
REV
= Inverse Power Loss = V
R1
x I
R
(1 - D); I
R
@ V
R1
= 80% rated V
R
4
www.irf.com
40L15CTSPbF, 40L15CT-1PbF
Bulletin PD-21037 02/07
Outlines Table
Conform to JEDEC outline D
2
Pak (SMD-220)
Dimensions in millimeters and (inches)
Modified JEDEC outline TO-262
Dimensions in millimeters and (inches)
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5
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