SCHOTTKY RECTIFIER
80 Amp
PD-20541 rev. E 10/99
www.irf.com
1
Case Styles
D61-8
D61-8-SM
D61-8-SL
87CNQ020
87CNQ020SM
87CNQ020SL
Major Ratings and Characteristics
I
F(AV)
Rectangular
80
A
waveform
V
RRM
20
V
I
FSM
@ tp = 5 s sine
6000
A
V
F
@
40 Apk, T
J
= 125 C
0.32
V
(per leg)
T
J
range
- 55 to 150
C
Characteristics
Values
Units
The center tap Schottky rectifier module has been optimized
for ultra low forward voltage drop specifically for 3.3V output
power supplies. The proprietary barrier technology allows for
reliable operation up to 150 C junction temperature. Typical
applications are in parallel switching power supplies,
converters, reverse battery protection, and redundant power
subsystems.
150 C T
J
operation
Center tap module
Optimized for 3.3V application
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
Low profile, small footprint, high current package
Description/Features
8 7 C N Q 0 2 0
8 7 C N Q 0 2 0 S M
8 7 C N Q 0 2 0 S L
87CNQ020, 87CNQ020SM, 87CNQ020SL
2
PD-20541 rev. E 10/99
www.irf.com
I
F(AV)
Max. Average Forward
(Per Device)
80
A
50% duty cycle @ T
C
= 135C, rectangular wave form
Current
(Per Leg)
40
I
FSM
Max. Peak One Cycle Non-Repetitive
6000
5s Sine or 3s Rect. pulse
Surge Current (Per Leg)
1100
10ms Sine or 6ms Rect. pulse
E
AS
Non-Repetitive Avalanche Energy
36
mJ
T
J
= 25 C, I
AS
= 8 Amps, L = 1.12 mH
(Per Leg)
I
AR
Repetitive Avalanche Current
8
A
Current decaying linearly to zero in 1 sec
(Per Leg)
Frequency limited by T
J
max. V
A
= 1.5 x V
R
typical
Following any rated
load condition and with
rated Vrrm
applied
Electrical Specifications
Part number 87CNQ020 / ..020SM / ..020SL
V
R
Max. DC Reverse Voltage (V) @ 125 C
V
R
Max. DC Reverse Voltage (V) @ 150 C
Voltage Ratings
Absolute Maximum Ratings
Parameters
87CNQ Units
Conditions
A
T
J
= 25 C
T
J
= 125 C
V
R
= rated V
R
Parameters 87CNQ Units Conditions
T
J
Max. Junction Temperature Range
-55 to 150
C
T
stg
Max. Storage Temperature Range
-55 to 150
C
R
thJC
Max. Thermal Resistance Junction
0.85
C/W
DC operation
to Case (Per Leg)
R
thJC
Max. Thermal Resistance Junction
0.42
C/W
DC operation
to Case (Per Package)
R
thCS
Typical Thermal Resistance, Case
0.30
C/W
Mounting surface , smooth and greased
to Heatsink (D61-8 Only)
wt
Approximate Weight
7.8 (0.28)
g (oz.)
T
Mounting Torque
Min.
40 (35)
(D61-8 Only)
Max.
58 (50)
Thermal-Mechanical Specifications
Kg-cm
(Ibf-in)
(1) Pulse Width < 300s, Duty Cycle <2%
20
10
T
J
= 150 C
Parameters
87CNQ Units
Conditions
V
FM
Max. Forward Voltage Drop
0.45
V
@ 40A
(Per Leg)
(1)
0.51
V
@ 80A
0.32
V
@ 40A
0.39
V
@ 80A
0.29
V
@ 40A
0.37
V
@ 80A
I
RM
Max. Reverse Leakage Current
5.5
mA
T
J
= 25 C
(Per Leg)
(1)
550
mA
T
J
= 125 C
90
mA
T
J
= 125 C
V
R
= 5V
70
mA
T
J
= 125 C
V
R
= 3.3V
480
mA
T
J
= 150 C
V
R
= 10V
V
F(TO)
Threshold Voltage
0.191
V
T
J
= T
J
max.
r
t
Forward Slope Resistance
2.3
m
C
T
Max. Junction Capacitance (Per Leg)
6500
pF
V
R
= 5V
DC
, (test signal range 100Khz to 1Mhz) 25C
L
S
Typical Series Inductance (Per Leg)
5.5
nH
Measured lead to lead 5mm from package body
dv/dt Max. Voltage Rate of Change
10,000
V/ s
(Rated V
R
)
87CNQ020, 87CNQ020SM, 87CNQ020SL
3
PD-20541 rev. E 10/99
www.irf.com
Fig. 2 - Typical Values Of Reverse Current
Vs. Reverse Voltage (Per Leg)
Fig. 3 - Typical Junction Capacitance
Vs. Reverse Voltage (Per Leg)
Fig. 4 - Max. Thermal Impedance Z
thJC
Characteristics (Per Leg)
Fig. 1 - Max. Forward Voltage Drop Characteristics
(Per Leg)
0.01
0.1
1
10
100
1000
10000
0
5
10
15
20
R
R
125C
100C
75C
50C
25C
R
e
v
e
r
s
e
C
u
r
r
e
n
t
-
I
(
m
A
)
Reverse Voltage - V (V)
T = 150C
J
1000
10000
0
5
10
15
20
25
R
T
J
u
n
ct
i
on
C
a
p
a
ci
t
a
n
c
e
-
C
(
p
F
)
Reverse Voltage - V (V)
T = 25C
J
0.001
0.01
0.1
1
0.00001
0.0001
0.001
0.01
0.1
1
10
100
thJ
C
t , Rectangular Pulse Duration (Seconds)
Single Pulse
(Thermal Resistance)
1
T
h
e
r
m
a
l
I
m
p
e
da
n
ce
Z
(
C
/W
)
Notes:
1. Duty factor D = t / t
2. Peak T = P x Z + T
1
2
J
t hJC
C
DM
D = 0.75
D = 0.50
D = 0.33
D = 0.25
D = 0.20
2
t
1
t
P
DM
1
10
100
1000
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8 0.9
F
FM
T = 150C
T = 125C
T = 25C
J
J
J
Forward Voltage Drop - V (V)
I
n
s
t
a
n
t
a
n
e
o
u
s
F
o
rw
a
r
d
C
u
rre
n
t
-
I
(
A
)
87CNQ020, 87CNQ020SM, 87CNQ020SL
4
PD-20541 rev. E 10/99
www.irf.com
Fig. 7 - Max. Non-Repetitive Surge Current (Per Leg)
Fig. 5 - Max. Allowable Case Temperature
Vs. Average Forward Current (Per Leg)
Fig. 8 - Unclamped Inductive Test Circuit
Fig. 6 - Forward Power Loss Characteristics
(Per Leg)
FREE-WHEEL
DIODE
40HFL40S02
C URRENT
MON ITOR
HIGH-SPEED
SWITCH
IRFP460
L
DUT
Rg = 25 ohm
Vd = 25 Volt
+
(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
120
125
130
135
140
145
150
0
10
20
30
40
50
60
DC
A
l
low
a
b
l
e
C
a
s
e
T
em
p
e
r
a
t
u
r
e
-
(
C
)
F(AV)
see note (2)
Average Forward Current - I (A)
Square wave (D = 0.50)
80% Rated V applied
R
0
5
10
15
20
25
0
10
20
30
40
50
60
DC
A
v
e
r
a
g
e
P
o
w
e
r
Lo
ss
-
(
W
a
t
t
s
)
F(AV)
RMS Limit
D = 0.20
D = 0.25
D = 0.33
D = 0.50
D = 0.75
Average Forward Current - I (A)
1 00
10 0 0
10 0 0 0
1 0
1 00
1 00 0
10 0 00
FS
M
N
o
n
-
R
e
p
e
t
i
t
i
v
e
Su
r
g
e
C
u
r
r
e
n
t
-
I
(
A
)
p
At Any Rated Load Condition
And With Rated V Applied
Following Surge
RRM
Square Wave Pulse Duration - t (microsec)
87CNQ020, 87CNQ020SM, 87CNQ020SL
5
PD-20541 rev. E 10/99
www.irf.com
Outline Table
Outline D61-8-SM
Dimensions are in millimeters and (inches)
Outline D61-8
Dimensions are in millimeters and (inches)
87CNQ020, 87CNQ020SM, 87CNQ020SL
6
PD-20541 rev. E 10/99
www.irf.com
Outline Table
WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245 U.S.A. Tel: (310) 322 3331. Fax: (310) 322 3332.
EUROPEAN HEADQUARTERS: Hurst Green, Oxted, Surrey RH8 9BB, U.K. Tel: ++ 44 1883 732020. Fax: ++ 44 1883 733408.
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IR GERMANY: Saalburgstrasse 157, 61350 Bad Homburg. Tel: ++ 49 6172 96590. Fax: ++ 49 6172 965933.
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IR FAR EAST: K&H Bldg., 2F, 30-4 Nishi-Ikebukuro 3-Chome, Toshima-Ku, Tokyo, Japan 171. Tel: 81 3 3983 0086.
IR SOUTHEAST ASIA: 1 Kim Seng Promenade, Great World City West Tower,13-11, Singapore 237994. Tel: ++ 65 838 4630.
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http://www.irf.com
Fax-On-Demand: +44 1883 733420 Data and specifications subject to change without notice.
Outline D61-8-SL
Dimensions are in millimeters and (inches)
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