Bulletin PD-20577 rev. D 08/01
20L15T
20L15TS
SCHOTTKY RECTIFIER
20 Amps
Major Ratings and Characteristics
Characteristics
I
F(AV)
Rectangular
waveform
V
RRM
I
FSM
V
F
T
J
@ tp = 5 µs sine
@ 19 Apk, T
J
=125°C
( Typical)
range
Description/Features
Units
A
V
A
V
The 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)
Single diode configuration
Optimized for OR-ing applications
Ultra low forward voltage drop
Guard ring for enhanced ruggedness and long term
reliability
High purity, high temperature epoxy encapsulation for
enhanced mechanical strength and moisture resistance
Values
20
15
700
0.25
- 55 to 125
°C
Case Styles
20L15T
20L15TS
Base
Cathode
Base
Cathode
2
1
3
1
3
Cathode
Anode
N/C
Anode
TO-220AC
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D
2
PAK
1
20L15T, 20L15TS
Bulletin PD-20577 rev. D 08/01
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
Values
15
Absolute Maximum Ratings
Parameters
I
F(AV)
Max. Average Forward Current
* See Fig. 5
I
FSM
E
AS
I
AR
Max. Peak One Cycle Non-Repetitive
Surge Current * See Fig. 7
Non-Repetitive Avalanche Energy
Repetitive Avalanche Current
700
330
10
2
A
mJ
A
Following any rated
load condition and with
10ms Sine or 6ms Rect. pulse rated V
RRM
applied
5µs Sine or 3µs Rect. pulse
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
Values
20
Units
A
Conditions
50% duty cycle @ T
C
= 85°C, rectangular wave form
Electrical Specifications
Parameters
V
FM
Forward Voltage Drop
* See Fig. 1
Values
Typ.
-
-
0.25
0.37
-
(1)
-
7.6
-
8
2000
-
Max.
0.41
0.52
0.33
0.50
10
600
Units
V
V
V
V
mA
mA
V
mΩ
pF
nH
V/ µs
@ 19A
@ 40A
@ 19A
@ 40A
Conditions
T
J
= 25 °C
T
J
= 125 °C
V
R
= rated V
R
(1)
I
RM
Reverse Leakage Current
* 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
Typical Series Inductance
0.182
V
R
= 5V
DC
, (test signal range 100Khz to 1Mhz) 25°C
Measured lead to lead 5mm from package body
dv/dt Max. Voltage Rate of Change
(Rated V
R
)
10,000
(1) Pulse Width < 300µs, Duty Cycle <2%
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
R
thCS
Typical Thermal Resistance
Case to Heatsink
R
thJA
Max. Thermal Resistance
Junction to Ambient
wt
T
Approximate Weight
MountingTorque
°C/W DCoperation
* See Fig. 4
°C/W Mounting surface , smooth and greased
For TO-220
°C/W DC operation
For D
2
Pak
g (oz.)
Kg-cm Non-lubricated threads
(Ibf-in)
2
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20L15T, 20L15TS
Bulletin PD-20577 rev. D 08/01
1 00 0
10 0 0
T
J
= 100 C
100
75 C
50 C
Reverse C urren t - I
R
(m A)
10
25 C
1
Instan ta n eo us Forw ard C ur ren t - I
F
(A )
100
0 .1
0
3
6
9
12
15
Reverse V oltag e - V
R
(V )
Fig. 2 - Typical Values of Reverse Current
Vs. Reverse Voltage
1 00 0 0
Jun ction C a pa cita n ce - C
T
(pF)
T
J
= 12 5 C
T
J
= 7 5 C
T
J
= 2 5 C
10
T
J
= 25 C
1 0 00
1
0
0 .2
0 .4
0.6
0.8
1
1 .2
1.4
1 .6
Forw a rd V olta ge D rop - V
FM
(V )
100
0
5
10
15
20
Reverse V olta ge - V
R
(V )
Fig. 1 - Maximum Forward Voltage Drop Characteristics
10
Th erm a l Im pedance Z
thJC
( C /W )
Fig. 3 - Typical Junction Capacitance
Vs. Reverse Voltage
1
D
D
D
D
D
=
=
=
=
=
0 .75
0 .50
0 .33
0 .25
0 .2 0
P
D M
0 .1
Sin gle Pu lse
(Therm a l Resista n ce)
Notes:
t1
t2
1. D uty factor D = t 1/ t 2
2. Peak T
J
= P
D M
x Z
thJC
+ T
C
0 .1
1
10
100
0 .0 1
0.00 00 1
0 .00 0 1
0 .0 01
0.0 1
t 1 , Re ctan g ular Pu lse D ura tio n (Seco nd s)
Fig. 4 - Maximum Thermal Impedance Z
thJC
Characteristics
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3
20L15T, 20L15TS
Bulletin PD-20577 rev. D 08/01
1 00
Allow a b le Ca se Te m pera t ure - ( C )
A vera ge Pow er Loss - (W a tts)
95
90
85
80
75
se e no te ( 2)
14
12
10
8
6
4
2
0
0
4
8
12
16
20
24
0
5
10
15
20
25
30
A vera ge Forw ard C urren t - I
F(AV)
(A)
A vera ge Forw a rd C urren t - I
F(AV)
(A)
D
D
D
D
D
=
=
=
=
=
0.20
0.25
0.33
0.50
0.75
RM S Lim it
DC
Squa re w ave (D = 0.50)
70
Fig. 5 - Maximum Allowable Case Temperature
Vs. Average Forward Current
1000
Non-Repetitive Surge C urrent - I
FSM
(A)
Fig. 6 - Forward Power Loss Characteristics
At An y Rated Load C ond ition
An d W ith Rated V
RRM
Ap plied
Follow in g Surg e
100
10
100
1000
10000
Sq uare W ave Pulse D uration - t p (m icrosec)
Fig. 7 - Maximum Non-Repetitive Surge Current
L
H IG H -SPE ED
SW ITC H
FREE-W HE EL
D IO D E
40H FL40S02
V d = 25 V olt
D UT
IRFP460
Rg = 25 ohm
+
C UR RE N T
M O N ITO R
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
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20L15T, 20L15TS
Bulletin PD-20577 rev. D 08/01
Outline Table
10.16 (0.40)
REF.
4.69 (0.18)
4.20 (0.16)
1.32 (0.05)
6.47 (0.25)
15.49 (0.61)
1.22 (0.05)
93°
6.18 (0.24)
14.73 (0.58)
2.61 (0.10)
2.32 (0.09)
8.89 (0.35)
5.28 (0.21)
4.78 (0.19)
0.55 (0.02)
0.46 (0.02)
3X
1.40 (0.055)
REF.
0.93 (0.37)
0.69 (0.27)
1.14 (0.045)
2X
Base
Cathode
2
MINIMUM RECOMMENDED FOOTPRINT
11.43 (0.45)
1
3
4.57 (0.18)
4.32 (0.17)
2
1
3
8.89 (0.35)
17.78 (0.70)
3.81 (0.15)
2.08 (0.08)
2X
0.61 (0.02) MAX.
5.08 (0.20) REF.
N/C
Anode
Conform to JEDEC outline D
2
Pak (SMD-220)
Dimensions in millimeters and (inches)
2.54 (0.10)
2X
Tape & Reel Information
TRR
1.60 (0.063)
1.50 (0.059)
4.10 (0.161)
3.90 (0.153)
1.60 (0.063)
1.50 (0.059)
DIA.
0.368 (0.0145)
0.342 (0.0135)
FEED DIR ECTION
1.85 (0.073)
1.65 (0.065)
11.60 (0.457)
11.40 (0.449)
15.42 (0.609)
15.22 (0.601)
1.75 (0.069)
24.30 (0.957)
23.90 (0.941)
TRL
10.90 (0.429)
10.70 (0.421)
1.25 (0.049)
16.10 (0.634)
15.90 (0.626)
DIA.
4.72 (0.186)
4.52 (0.178)
FEED DIRECTION
13.50 (0.532)
DIA.
12.80 (0.504)
26.40 (1.039)
24.40 (0.961)
SMD-220 Tape & Reel
When ordering, indicate the part
number, part orientation, and the
quantity. Quantities are in multiples
60 (2.362)
D IA . MIN .
360 (14.173)
DIA. MAX.
of 800 pieces per reel for both
TRL and TRR.
Dimensions in millimeters and (inches)
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5
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