SCHOTTKY RECTIFIER 2 x 20 Amps
STPS40L15CTPbF
Bulletin PD-20874 rev. A 02/07
1www.irf.com
IF(AV) Rectangular 40 A
waveform
VRRM 15 V
IFSM @ tp = 5 μs sine 700 A
VF@ 19 Apk, TJ=125°C 0.25 V
(per leg, Typical)
TJ- 55 to 125 °C
Characteristics Values Units
Major Ratings and Characteristics Description/ Features
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 tempera-
ture. Typical applications are in parallel switching power
supplies, converters, reverse battery protection, and redun-
dant power subsystems.
125°C TJ operation (VR < 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)
IF(AV) = 40Amp
VR = 15V
Case Styles
TO-220
Anode
13
2
Base
Common
Cathode
2
A
node
Common
Cathode
STPS40L15CTPbF
Bulletin PD-20874 rev. A 02/07
2www.irf.com
IF(AV) Max. Average Forward (Per Leg) 20 A 50% duty cycle @ TC = 85°C, rectangular wave form
Current * See Fig. 5 (Per Device) 40
IFSM Max. Peak One Cycle Non-Repetitive 700 5μs Sine or 3μs Rect. pulse
Surge Current (Per Leg) * See Fig. 7 330 10ms Sine or 6ms Rect. pulse
EAS Non-Repetitive Avalanche Energy 10 mJ TJ = 25 °C, IAS
= 2 Amps, L = 6 mH
(Per Leg)
IAR Repetitive Avalanche Current 2 A Current decaying linearly to zero in 1 μsec
(Per Leg) Frequency limited by TJ max. VA = 1.5 x VR typical
Part number Values
VRMax. DC Reverse Voltage (V) @ TJ = 100 °C
VRWM Max. Working Peak Reverse Voltage (V) @ TJ = 100 °C 15
TJMax. Junction Temperature Range -55 to 125 °C
Tstg Max. Storage Temperature Range -55 to 150 °C
RthJC Max. Thermal Resistance 1.5 °C/W DC operation * See Fig. 4
Junction to Case (Per Leg)
RthCS Typical Thermal Resistance 0.50 °C/W Mounting surface , smooth and greased
Case to Heatsink Only for TO-220
RthJA Max. Thermal Resistance 40 °C/W DC operation
Junction to Ambient For D2Pak and TO-262
wt Approximate Weight 2 (0.07) g (oz.)
T Mounting Torque Min. 6 (5) Non-lubricated threads
Max. 12 (10)
Marking Device STPS40L15CT
Thermal-Mechanical Specifications
Kg-cm
(Ibf-in)
Parameters Values Units Conditions
Absolute Maximum Ratings
Following any rated
load condition and with
rated VRRM applied
Parameters Values Units Conditions
A
Typ. Max.
VFM Forward Voltage Drop - 0.41 V @ 19A
(Per Leg) * See Fig. 1 (1) - 0.52 V @ 40A
0.25 0.33 V @ 19A
0.37 0.50 V @ 40A
IRM Reverse Leakage Current - 10 mA TJ = 25 °C
(Per Leg) * See Fig. 2 (1) - 600 mA TJ = 100 °C
VF(TO) Threshold Voltage 0.182 V TJ = TJ max.
rtForward Slope Resistance 7.6 mΩ
CTMax. Junction Capacitance (Per Leg) - 2000 pF VR = 5VDC (test signal range 100Khz to 1Mhz) 25°C
LSTypical Series Inductance (Per Leg) 8 - nH Measured lead to lead 5mm from package body
dv/dt Max. Voltage Rate of Change 10000 V/ μs
(Rated VR)
TJ = 25 °C
TJ = 125 °C
VR = rated VR
Parameters Values Units Conditions
(1) Pulse Width < 300μs, Duty Cycle <2%
Voltage Ratings
Electrical Specifications
STPS40L15CTPbF
Bulletin PD-20874 rev. A 02/07
3
www.irf.com
Fig. 2 - Typical Values of Reverse Current
Vs. Reverse Voltage
Fig. 3 - Typical Junction Capacitance
Vs. Reverse Voltage
Fig. 4 - Maximum Thermal Impedance ZthJC Characteristics
Fig. 1 - Maximum Forward Voltage Drop Characteristics
1
10
100
1000
0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6
F
FM
Forward Voltage Drop - V (V)
Instantaneous Forward Current - I (A)
T = 125°C
T = 75°C
T = 25°C
J
J
J
0.1
1
10
100
1000
03691215
R
R
75°C
50°C
25°C
Reverse C urrent - I (mA)
Reverse Volta ge - V (V)
T = 100°C
J
100
1000
10000
0 5 10 15 20
R
T
Junction Capacitance - C (pF)
Re ve rse Volt a ge - V (V)
T = 2 5 ° C
J
0.01
0.1
1
10
0.00001 0.0001 0.001 0.01 0.1 1 10 100
thJC
t , Rectangular Pulse Duration (Seconds)
Single Pulse
( Th e rm a l Re sist a nc e )
1
Therma l Imp ed anc e Z (°C/ W)
Not es:
1. Duty factor D = t / t
2. Pe a k T = P x Z + T
12
JthJC C
DM
D = 0.75
D = 0.50
D = 0.33
D = 0.25
D = 0.20
2
t
1
t
P
DM
STPS40L15CTPbF
Bulletin PD-20874 rev. A 02/07
4www.irf.com
Fig. 8 - Unclamped Inductive Test Circuit
Fig. 5 - Maximum Allowable Case Temperature
Vs. Average Forward Current
Fig. 6 - Forward Power Loss Characteristics
Fig. 7 - Maximum Non-Repetitive Surge Current
FREE- W HEEL
DIODE
40HFL40S02
C URREN T
MONITOR
HIG H- SPEED
SW I TC H
IRFP460
L
DUT
Rg = 25 o hm
Vd = 25 Volt
+
0
2
4
6
8
10
12
14
0 5 10 15 20 25 30
DC
Average Power Loss - (Watts)
F( A V )
RM S Li m it
D = 0.20
D = 0.25
D = 0.33
D = 0.50
D = 0.75
Average Forward Current - I (A)
100
1000
10 100 1000 10000
FSM
Non-Repetitive Surge Current - I (A)
p
At Any Rated Load Condition
And With Rated V Applied
Follow ing Surg e
RRM
Sq uare Wa ve Pulse Durat ion - t (m ic rosec )
70
75
80
85
90
95
100
0 4 8 12162024
Allowable Case Temperature - (°C)
F(AV)
se e note ( 2)
Average Forward Current - I (A)
Sq ua re wa ve (D = 0.50)
(2) Formula used: TC = TJ - (Pd + PdREV) x RthJC
;
Pd = Forward Power Loss = IF(AV) x VFM @ (IF(AV) / D) (see Fig. 6);
PdREV = Inverse Power Loss = VR1 x IR (1 - D); IR @ VR1
= 80% rated VR
STPS40L15CTPbF
Bulletin PD-20874 rev. A 02/07
5
www.irf.com
INTERNATIONAL
RECTIFIER
ASSEMBLY
LOT CODE
LOGO
EXAMPLE: THIS IS A STPS40L15CT
ASSEMBLED ON WW 19, 2001
IN THE ASSEMBLY LINE "C"
LOT CODE 1789
WEEK 19
LINE C
PART NUMBER
DATE CODE
P = LEAD-FREE
YEAR 1 = 2001
IRXC Assembly Line - SubCon Assembly Line
INTERNATIONAL
RECTIFIER
ASSEMBLY
LOT CODE
EXAMPLE:
IRMX Assembly Line
ASSEMBLED ON WW 19, 2001
LOT CODE 1789
LOGO
P = LEAD-FREE
PART NUMBER
DATE CODE
YEAR 1 = 2001
WEEK 19
THIS IS A STPS40L15CT
Part Marking Information
Outline Table
Conform to JEDEC outline TO-220AB
STPS40L15CTPbF
Bulletin PD-20874 rev. A 02/07
6www.irf.com
IR WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245, USA Tel: (310) 252-7105
TAC Fax: (310) 252-7309
Visit us at www.irf.com for sales contact information. 02/07
Data and specifications subject to change without notice.
This product has been designed and qualified for Industrial Level and Lead-Free.
Qualification Standards can be found on IR's Web site.
Ordering Information Table
Device Code
1524
3
1- Schottky STPS Series
2- Current Rating (40 = 40A)
3- L = Low Voltage Drop
4- Voltage Rating (15 = 15V)
5- CT = Essential Part Number
6y none = Standard Production
y PbF = Lead-Free
STPS 40 L 15 CT PbF
6
