PD-2.237 rev. B 01/99 81CNQ... SERIES SCHOTTKY RECTIFIER 80 Amp Major Ratings and Characteristics Description/Features The 81CNQ 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. Characteristics 81CNQ... Units I F(AV) Rectangular 80 A 35 to 45 V 175 °C TJ operation I FSM @ tp = 5 µs sine 4600 A Center tap module High purity, high temperature epoxy encapsulation for enhanced mechanical strength and moisture resistance VF @ 40 Apk, TJ = 125°C (per leg) 0.54 V Low forward voltage drop High frequency operation TJ range - 55 to 175 °C Guard ring for enhanced ruggedness and long term reliability Low profile, small footprint, high current package waveform VRRM range Case Styles 81CNQ... 81CNQ...SM 81CNQ...SL D61-8 D61-8-SM D61-8-SL www.irf.com 1 81CNQ... Series PD-2.237 rev. B 01/99 Voltage Ratings Part number VR 81CNQ035 81CNQ040 81CNQ045 35 40 45 Max. DC Reverse Voltage (V) VRWM Max. Working Peak Reverse Voltage (V) Absolute Maximum Ratings Parameters 81CNQ Units IF(AV) Max. Average Forward Current 80 Conditions A 50% duty cycle @ T C = 141 °C, rectangular wave form A Following any rated load condition and with 10ms Sine or 6ms Rect. pulse rated VRRM applied * See Fig. 5 IFSM Max. Peak One Cycle Non-Repetitive 4600 Surge Current (Per Leg) * See Fig. 7 790 EAS Non-Repetitive Avalanche Energy (Per Leg) 54 mJ IAR Repetitive Avalanche Current (Per Leg) 8 A 5µs Sine or 3µs Rect. pulse TJ = 25 °C, IAS = 8 Amps, L = 1.7 mH Current decaying linearly to zero in 1 µsec Frequency limited by TJ max. V A = 1.5 x VR typical Electrical Specifications Parameters VFM IRM 81CNQ Units Max. Forward Voltage Drop (Per Leg) * See Fig. 1 (1) Conditions 0.60 0.74 0.54 V V V @ 40A @ 80A @ 40A 0.66 V @ 80A Max. Reverse Leakage Current 5 mA TJ = 25 °C (Per Leg) * See Fig. 2 45 mA TJ = 125 °C (1) TJ = 25 °C TJ = 125 °C VR = rated VR CT Max. Junction Capacitance (Per Leg) 2600 pF VR = 5VDC, (test signal range 100Khz to 1Mhz) 25°C LS Typical Series Inductance (Per Leg) 5.5 nH Measured lead to lead 5mm from package body 10,000 V/ µs dv/dt Max. Voltage Rate of Change (Rated VR) (1) Pulse Width < 300µs, Duty Cycle <2% Thermal-Mechanical Specifications Parameters 81CNQ Units TJ Max. Junction Temperature Range -55 to 175 Tstg Max. Storage Temperature Range -55 to 175 Conditions °C °C RthJC Max. Thermal Resistance Junction to Case (Per Leg) 0.85 °C/W DCoperation RthJC Max. Thermal Resistance Junction to Case (Per Package) 0.42 °C/W DCoperation RthCS Typical Thermal Resistance, Case to Heatsink (D61-8 Only) 0.30 °C/W Mounting surface , smooth and greased wt Approximate Weight 7.8 (0.28) g (oz.) T Mounting Torque Min. 40 (35) (D61-8 Only) Max. 58 (50) Kg-cm (Ibf-in) 2 * See Fig. 4 www.irf.com 81CNQ... Series PD-2.237 rev. B 01/99 1000 Reverse Current - I R (mA) 1000 (A) 100 150°C 10 125°C 1 100°C 75°C 0.1 50°C 0.01 F 25°C 0.001 0 5 10 15 20 25 30 35 40 45 Reverse Voltage - VR (V) 10 Fig. 2 - Typical Values Of Reverse Current Vs. Reverse Voltage (Per Leg) TJ = 175°C 10000 (pF) TJ = 125°C T TJ = 25°C Junction Capacitance - C Instantaneous Forward Current - I T J = 175°C 100 1 0.1 T = 25°C J 1000 100 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 0 10 20 30 40 Forward Voltage Drop - V FM (V) Reverse Voltage - VR (V) Fig. 1 - Max. Forward Voltage Drop Characteristics (PerLeg) Fig. 3 - Typical Junction Capacitance Vs. Reverse Voltage (Per Leg) 50 Thermal Impedance Z thJC (°C/W) 1 0.1 D= D= D= D= D= 0.50 0.33 0.25 0.17 0.08 PDM Notes: Single Pulse (Thermal Resistance) 0.01 0.00001 0.0001 0.001 0.01 t1 t2 1. Duty factor D = t 1/ t 2 2. Peak TJ = PDM x Z thJ C+ T C 0.1 1 10 100 t 1 , Rectangular Pulse Duration (Seconds) Fig. 4 - Max. Thermal Impedance ZthJC Characteristics (Per Leg) www.irf.com 3 81CNQ... Series PD-2.237 rev. B 01/99 32 R thJC (DC) = 0.85 °C/W Average Power Loss - (Watts) Allowable Case Temperature - (°C) 180 170 160 DC 150 D = 0.08 D = 0.17 D = 0.25 D = 0.33 D = 0.50 28 24 20 16 DC RMS Limit 12 8 4 140 0 0 10 20 30 40 50 60 0 Average Forward Current - I F(AV) (A) Fig. 5 - Max. Allowable Case Temperature Vs. Average Forward Current (Per Leg) 20 30 40 50 60 Fig. 6 - Forward Power Loss Characteristics (PerLeg) 10000 Non-Repetitive Surge Current - I FSM (A) 10 Average Forward Current - I F(AV) (A) 1000 At Any Rated Load Condition And With Rated VRRM Applied Following Surge 100 10 100 1000 10000 Square Wave Pulse Duration - t p (microsec) Fig. 7 - Max. Non-Repetitive Surge Current (Per Leg) L DUT IRFP460 Rg = 25 ohm CURRENT MONITOR HIGH-SPEED SWITCH FREE-WHEEL DIODE + Vd = 25 Volt 40HFL40S02 Fig. 8 - Unclamped Inductive Test Circuit 4 www.irf.com 81CNQ... Series PD-2.237 rev. B 01/99 Outline Table Outline D61-8 Dimensions are in millimeters and (inches) Outline D61-8-SM Dimensions are in millimeters and (inches) www.irf.com 5 81CNQ... Series PD-2.237 rev. B 01/99 Outline Table Outline D61-8-SL Dimensions are in millimeters and (inches) FOOT PRINT WORLD HEADQUARTERS: EUROPEAN HEADQUARTERS: IR CANADA: IR GERMANY: IR ITALY: IR FAR EAST: IR SOUTHEAST ASIA: IR TAIWAN: http://www.irf.com 6 233 Kansas St., El Segundo, California 90245 U.S.A. Tel: (310) 322 3331. Fax: (310) 322 3332. Hurst Green, Oxted, Surrey RH8 9BB, U.K. Tel: ++ 44 1883 732020. Fax: ++ 44 1883 733408. 15 Lincoln Court, Brampton, Markham, Ontario L6T3Z2. Tel: (905) 453 2200. Fax: (905) 475 8801. Saalburgstrasse 157, 61350 Bad Homburg. Tel: ++ 49 6172 96590. Fax: ++ 49 6172 965933. Via Liguria 49, 10071 Borgaro, Torino. Tel: ++ 39 11 4510111. Fax: ++ 39 11 4510220. K&H Bldg., 2F, 30-4 Nishi-Ikebukuro 3-Chome, Toshima-Ku, Tokyo, Japan 171. Tel: 81 3 3983 0086. 1 Kim Seng Promenade, Great World City West Tower,13-11, Singapore 237994. Tel: ++ 65 838 4630. 16 Fl. Suite D.207, Sec. 2, Tun Haw South Road, Taipei, 10673, Taiwan. Tel: 886 2 2377 9936. Fax-On-Demand: +44 1883 733420 Data and specifications subject to change without notice. www.irf.com