Page 1
PD-2.217 rev. B 12/97
84CNQ... SERIES
SCHOTTKY RECTIFIER 80 Amp
Major Ratings and Characteristics
Characteristics 84CNQ... Units
I
Rectangular 80 A
F(AV)
waveform
V
RRM
@ tp = 5 µs sine 8000 A
I
FSM
VF@ 40 Apk, TJ = 100°C 0.44 V
(per leg)
T
J
CASE STYLE AND DIMENSIONS
35 to 45 V
- 55 to 125 °C
Description/Features
The 84CNQ center tap Schottky rectifier module series has
been optimized for extremely low forward voltage drop, with
higher leakage. The proprietary barrier technology allows for
reliable operation up to 125° C junction temperature. Typical
applications are in switching power supplies, converters, freewheeling diodes, and reverse battery protection.
125° C TJ operation
Center tap module
High purity, high temperature epoxy encapsulation for
enhanced mechanical strength and moisture resistance
Extremely low forward voltage drop
High frequency operation
Guard ring for enhanced ruggedness and long term
reliability
Low profile, small footprint, high current package
Outline D - 61 - 8
Dimensions in millimeters and inches
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Page 2
84CNQ... Series
PD-2.217 rev. B 12/97
Voltage Ratings
Part number 84CNQ035 84CNQ040 84CNQ045
VRMax. DC Reverse Voltage (V)
V
Max. Working Peak Reverse Voltage (V)
RWM
35 40 45
Absolute Maximum Ratings
Parameters 84CNQ Units Conditions
I
Max. Average Forward Current 80 A 50% duty cycle @ TC = 91 °C, rectangular wave form
F(AV)
* See Fig. 5
I
Max. Peak One Cycle Non-Repetitive 8000 5µs Sine or 3µs Rect. pulse
FSM
Surge Current (Per Leg) * See Fig. 7 620 10ms Sine or 6ms Rect. pulse
EASNon-Repetitive Avalanche Energy 54 mJ T
(Per Leg)
I
Repetitive Avalanche Current 8 A Current decaying linearly to zero in 1 µsec
AR
(Per Leg) Frequency limited by T
A
= 25 °C, I
J
= 8 Amps, L = 1.7 mH
AS
Following any rated
load condition and with
rated V
max. VA = 1.5 x VR typical
J
RRM
applied
Electrical Specifications
Parameters 84CNQ Units Conditions
VFMMax. Forward Voltage Drop 0.49 V @ 40A
(Per Leg) * See Fig. 1 (1 ) 0.62 V @ 80A
0.44 V @ 40A
0.60 V @ 80A
IRMMax. Reverse Leakage Current 5 mA TJ = 25 °C
(Per Leg) * See Fig. 2 (1) 600 m A TJ = 125 °C
CTMax. Junction Capacitance (Per Leg) 2600 pF VR = 5VDC, (test signal range 100Khz to 1Mhz) 25°C
LSTypical Series Inductance (Per Leg) 5.5 n H Measured lead to lead 5mm from package body
dv/dt Max. Voltage Rate of Change 10,000 V/ µs
(Rated V
)
R
TJ = 25 °C
TJ = 100 °C
VR = rated V
(1) Pulse Width < 300µs, Duty Cycle <2%
R
Thermal-Mechanical Specifications
Parameters 84CNQ Units Conditions
TJMax. Junction Temperature Range -55 to 125 °C
T
Max. Storage Temperature Range -55 to 125 °C
stg
Max. Thermal Resistance Junction 0.85 °C/W DC operation * See Fig. 4
R
thJC
to Case (Per Leg)
R
Max. Thermal Resistance Junction 0.42 °C/W DC operation
thJC
to Case (Per Package)
Typical Thermal Resistance, Case 0.30 °C/W Mounting surface , smooth and greased
R
thCS
to Heatsink
wt Approximate Weight 7.8 (0.28) g (oz.)
T Mounting Torque Min. 40 (35)
Max. 58 (50)
Kg-cm
(Ibf-in)
Case Style D - 61 - 8
2
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Page 3
84CNQ... Series
5
0
0
PD-2.217 rev. B 12/97
1000
100
F
T = 125°C
10
Instantaneous Forward Current - I (A )
1
J
T = 100°C
J
T = 25°C
J
1000
T = 125° C
J
100
R
10
1
Reverse Current - I (mA)
.1
.01
100°C
75°C
50°C
25°C
0 5 10 15 20 25 30 35 40 4
Reverse Voltage - V (V)
Fig. 2 - Typical Values Of Reverse Current
Vs. Reverse Voltage (Per Leg)
10000
T
1000
T = 25°C
J
R
.1
0.1.2.3.4.5.6.7.8.91
Fig. 1 - Max. Forward Voltage Drop Characteristics
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Junction Capacitance - C (pF)
100
0 102030405
Forward Voltage D ro p - V (V)
FM
Re verse V oltage - V (V)
Fig. 3 - Typical Junction Capacitance
(Per Leg)
1
D = 0.50
D = 0.33
D = 0.25
th J C
Thermal Im pedance - Z (°C/W)
D = 0.17
D = 0.08
.1
Notes:
1. Du t y fa c tor D = t / t
S in g l e Puls e
(Th erm al Resistance)
.01
.00001 .0001 .001 .01 .1 1 10 10
t , Re ctangular Pulse Duration (Second s)
1
Fig. 4 - Max. Thermal Impedance Z
thJC
2 . Pe a k T = P x Z + T
Characteristics (Per Leg)
Vs. Reverse Voltage (Per Leg)
P
DM
t
1
t
2
JDMthJCC
R
1
2
3
Page 4
84CNQ... Series
0
PD-2.217 rev. B 12/97
130
125
120
115
110
105
100
Allowable C as e Tempera ture - (°C )
95
0102030405060
A v e r a g e For war d Cu rrent - I (A)
84CNQ
R ( DC ) = 0 .8 5 °C / W
th J C
DC
Fig. 5 - Max. Allowable Case Temperature
Vs. Average Forward Current (Per Leg)
10000
FSM
1000
F(AV)
At Any Rated Load Conditi on
And With Rated V Applied
Follow ing Surg e
RRM
30
D = 0.08
D = 0.17
25
D = 0.25
D = 0.33
D = 0.50
20
15
RMS Limit
10
Average P o wer L oss - (W atts)
5
0
010203040506
Average Forward Current - I (A)
Fig. 6 - Forward Power Loss Characteristics
(Per Leg)
DC
F(AV)
Non-R epetitive Surge Current - I (A)
100
10 100 1000 10000
Squar e Wave P ul se Duration - t (microsec)
p
Fig. 7 - Max. Non-Repetitive Surge Current (Per Leg)
L
HIGH-SPEED
SWITCH
FREE- WH EEL
DIODE
40HFL40S02
Vd = 25 Volt
+
CURRENT
MONITOR
DUT
IRFP46 0
Rg = 25 ohm
Fig. 8 - Unclamped Inductive Test Circuit
4
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