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Bulletin PD-20040 rev. A 09/01
81CNQ...A SERIES
SCHOTTKY RECTIFIER New GenIII D-61 Package
Major Ratings and Characteristics Characteristics
IF(AV) Rectangular waveform VRRM range IFSM @ tp = 5 s sine VF TJ @ 40 Apk, TJ = 125C (per leg) range
80 Amp
Description/Features
The 81CNQ...A center tap Schottky rectifier module series has been optimized for low reverse leakage at high temperature. The proprietary barrier technology allows for reliable operation up to 175 C junction temperature. Typical applications are in switching power supplies, converters, free-wheeling diodes, and reverse battery protection. 175 C TJ operation Center tap module High purity, high temperature epoxy encapsulation for enhanced mechanical strength and moisture resistance Low forward voltage drop High frequency operation Guard ring for enhanced ruggedness and long term reliability
81CNQ...A Units
80 35 to 45 4600 0.54 A V A V
- 55 to 175
C
New fully transfer-mold low profile, small footprint, high current package
Case Styles
81CNQ...A 81CNQ...ASM 81CNQ...ASL
D61-8 www.irf.com
D61-8-SM
D61-8-SL 1
81CNQ...A Series
Bulletin 20040 rev. A 09/01
Voltage Ratings
Part number
VR Max. DC Reverse Voltage (V) VRWM Max. Working Peak Reverse Voltage (V)
81CNQ035A
35
81CNQ040A
40
81CNQ045A
45
Absolute Maximum Ratings
Parameters
IF(AV) Max. Average Forward Current * See Fig. 5 IFSM EAS IAR Max. Peak One Cycle Non-Repetitive Surge Current (Per Leg) * See Fig. 7 Non-Repetitive Avalanche Energy (Per Leg) Repetitive Avalanche Current (Per Leg) 4600 790 54 8 A mJ A Following any rated load condition and with 10ms Sine or 6ms Rect. pulse rated VRRM applied 5s Sine or 3s Rect. pulse TJ = 25 C, IAS = 8 Amps, L = 1.7 mH Current decaying linearly to zero in 1 sec Frequency limited by TJ max. VA = 1.5 x VR typical
81CNQ Units
80 A
Conditions
50% duty cycle @ TC = 141 C, rectangular wave form
Electrical Specifications
Parameters
VFM Max. Forward Voltage Drop (Per Leg) * See Fig. 1 (1)
81CNQ Units
0.60 0.74 0.54 0.66 5 45 2600 5.5 10000 V V V V mA mA pF nH V/ s @ 40A @ 80A @ 40A @ 80A
Conditions
TJ = 25 C TJ = 125 C VR = rated VR
IRM CT LS
Max. Reverse Leakage Current (Per Leg) * See Fig. 2 Typical Series Inductance (1) (Per Leg) Max. Junction Capacitance (Per Leg)
TJ = 25 C TJ = 125 C
VR = 5VDC, (test signal range 100Khz to 1Mhz) 25C Measured lead to lead 5mm from package body
dv/dt Max. Voltage Rate of Change (Rated VR)
(1) Pulse Width < 300s, Duty Cycle <2%
Thermal-Mechanical Specifications
Parameters
TJ Tstg Max. Junction Temperature Range Max. Storage Temperature Range
81CNQ Units
-55 to 175 -55 to 175 0.85 0.42 0.30 7.8 (0.28) Min. Max. 40 (35) 58 (50) C C C/W C/W C/W g (oz.) Kg-cm (Ibf-in)
Conditions
RthJC Max. Thermal Resistance Junction to Case (Per Leg) RthJC Max. Thermal Resistance Junction to Case (Per Package) RthCS Typical Thermal Resistance, Case to Heatsink (D61-8 Only) wt T Approximate Weight MountingTorque (D61-8 Only)
DCoperation DCoperation
* See Fig. 4
Mounting surface , smooth and greased Device flatness < 5 mils
2
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81CNQ...A Series
Bulletin 20040 rev. A 09/01
1000
1000
Tj = 175C
100
Reverse Current - IR (mA)
150C
10 1 0.1 0.01 0.001 0 5
125C 100C 75C 50C 25C
100
Instantaneous Forward Current - I F (A)
10 15 20 25 30 35 40 45
Reverse Voltage - VR (V)
10
T = 175C J
Junction Capacitance - C T (p F)
Fig. 2 - Typical Values Of Reverse Current Vs. Reverse Voltage (Per Leg)
10000
T = 125C J T = 25C J
T J = 25C
1
1000
0.1 0 0.2 0.4 0.6 0.8 1
Forward Voltage Drop - VFM (V) Fig. 1 - Max. Forward Voltage Drop Characteristics (Per Leg)
100 0 10 20 30 40 50
Reverse Voltage - VR (V) Fig. 3 - Typical Junction Capacitance Vs. Reverse Voltage (Per Leg)
1
Thermal Impedance Z thJC (C/W)
D = 0.50 D = 0.33 D = 0.25 D = 0.17
0.1
D = 0.08
PDM
t1 t2 Notes: Single Pulse (Thermal Resistance) 1. Duty factor D = t1/ t2 2. Peak Tj = Pdm x ZthJC + Tc
0.01 0.00001
0.0001
0.001
0.01
0.1
1
10
100
t1 , Rectangular Pulse Duration (Seconds) Fig. 4 - Max. Thermal Impedance ZthJC Characteristics (Per Leg)
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3
81CNQ...A Series
Bulletin 20040 rev. A 09/01
180
Allowable Case Temperature (C)
32
RthJC (DC) = 0.85 C/W
Average Power Loss (Watts)
170
D = 0.08 28 D = 0.17 D = 0.25 24 D = 0.33 D = 0.50 20
160
DC
16 RMS Limit 12 8 4
DC
150
140 0 10 20 30 40 50 60
Average Forward Current - IF(AV) (A) Fig. 5 - Max. Allowable Case Temperature Vs. Average Forward Current (Per Leg)
0 0 10 20 30 40 50 60
Average Forward Current - IF(AV) (A) Fig. 6 - Forward Power Loss Characteristics (Per Leg)
10000
Non-Repetitive Surge Current - I FSM (A)
1000
At Any Rated Load Condition And With Rated Vrrm Applied Following Surge
100 10 100 1000 10000 Square Wave Pulse Duration - tp (microsec)
Fig. 7 - Max. Non-Repetitive Surge Current (Per Leg)
L H IG H-SPE ED SW ITC H FR EE-W H E EL D IO D E 40H FL40 S02 V d = 25 V olt
D UT
IRFP460 Rg = 25 ohm
+
C URRE NT M O N ITO R
Fig. 8 - Unclamped Inductive Test Circuit
4
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81CNQ...A Series
Bulletin 20040 rev. A 09/01
Outline Table
Outline D61-8
Dimensions are in millimeters and (inches)
Outline D61-8-SM
Dimensions are in millimeters and (inches)
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5
81CNQ...A Series
Bulletin 20040 rev. A 09/01
Outline Table
Outline D61-8-SL
Dimensions are in millimeters and (inches)
6
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81CNQ...A Series
Bulletin 20040 rev. A 09/01
Part Marking Information
INTERNATIONAL RECTIFIER LOGO THIS IS A 81CNQ045A WITH LOT CODE 89 09 ASSEMBLED ON WW 45, 2000 IN THE ASSEMBLY LINE "A" ASSEMBLY LOT CODE
PART NUMBER
81CNQ045A 89 09 045A DATE CODE YEAR 0 = 2000 WEEK 45 LINE A
D61-8
INTERNATIONAL RECTIFIER LOGO THIS IS A 81CNQ045ASM WITH LOT CODE 89 09 ASSEMBLED ON WW 45, 2000 IN THE ASSEMBLY LINE "A" ASSEMBLY LOT CODE 81CNQ045ASM 89 09 045A DATE CODE YEAR 0 = 2000 WEEK 45 LINE A
PART NUMBER
D61-8-SM
INTERNATIONAL RECTIFIER LOGO
81CNQ045ASL 89 09 045A
PART NUMBER
THIS IS A 81CNQ045ASL WITH LOT CODE 89 09 ASSEMBLED ON WW 45, 2000 IN THE ASSEMBLY LINE "A"
ASSEMBLY LOT CODE
DATE CODE YEAR 0 = 2000 WEEK 45 LINE A
D61-8-SL
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7
81CNQ...A Series
Bulletin 20040 rev. A 09/01
Data and specifications subject to change without notice. This product has been designed and qualified for Industrial Level. Qualification Standards can be found on IR's Web site.
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. 09/01
8
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