PD-2.238 rev. A 12/97 8TQ... SERIES SCHOTTKY RECTIFIER 8 Amp Description/Features Major Ratings and Characteristics The 8TQ Schottky rectifier 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 8TQ... Units IF(AV) Rectangular waveform 8 A 80 to 100 V IFSM @ tp = 5 s sine 850 A 175 C TJ operation High purity, high temperature epoxy encapsulation for enhanced mechanical strength and moisture resistance VF @ 8 Apk, TJ = 125C 0.58 V Low forward voltage drop High frequency operation TJ range - 55 to 175 C Guard ring for enhanced ruggedness and long term reliability VRRM range CASE STYLE AND DIMENSIONS Conforms to JEDEC Outline TO - 220AC Dimensions in millimeters and inches www.irf.com 1 8TQ... Series PD-2.238 rev. A 12/97 Voltage Ratings Part number VR 8TQ080 8TQ100 80 100 Max. DC Reverse Voltage (V) VRWM Max. Working Peak Reverse Voltage (V) Absolute Maximum Ratings Parameters IF(AV) Max. Average Forward Current * See Fig. 5 8TQ Units 8 A Max. Peak One Cycle Non-Repetitive 850 Surge Current * See Fig. 7 230 EAS Non-Repetitive Avalanche Energy 7.50 mJ IAR Repetitive Avalanche Current 0.50 A IFSM Conditions 50% duty cycle @ T C = 157 C, rectangular wave form 5s Sine or 3s Rect. pulse A 10ms Sine or 6ms Rect. pulse Following any rated load condition and with rated VRRM applied TJ = 25 C, IAS= 0.50 Amps, L = 60 mH Current decaying linearly to zero in 1 sec Frequency limited by TJ max. VA = 1.5 x VR typical Electrical Specifications Parameters VFM Max. Forward Voltage Drop (1) * See Fig. 1 IRM Max. Reverse Leakage Current (1) * See Fig. 2 8TQ Units Conditions 0.72 V @ 8A 0.88 V @ 16A 0.58 V @ 8A 0.69 V @ 16A 0.55 mA TJ = 25 C 7 mA TJ = 125 C TJ = 25 C TJ = 125 C VR = rated VR CT Max. Junction Capacitance 500 pF VR = 5VDC, (test signal range 100Khz to 1Mhz) 25 C LS Typical Series Inductance 8 nH Measured lead to lead 5mm from package body 10,000 V/ s dv/dt Max. Voltage Rate of Change (Rated VR) (1) Pulse Width < 300s, Duty Cycle < 2% Thermal-Mechanical Specifications 8TQ Units TJ Parameters Max. Junction Temperature Range -55 to 175 C Tstg Max. Storage Temperature Range Conditions -55 to 175 C RthJC Max. Thermal Resistance Junction to Case 2.0 C/W DCoperation RthCS Typical Thermal Resistance, Case to 0.50 C/W Mounting surface , smooth and greased * See Fig. 4 Heatsink wt Approximate Weight T Mounting Torque Case Style 2 2 (0.07)g (oz.) Min. 6 (5) Max. 12 (10) Kg-cm (Ibf-in) TO-220AC JEDEC www.irf.com 8TQ... Series PD-2.238 rev. A 12/97 1000 100 ReverseCurrent - I (mA) R T =175C J 150C 125C 1 100C .1 75C 50C .01 25C .001 .0001 0 20 10 40 1 .4 .6 .8 100 1000 T = 25C J .2 80 Fig. 2 - Typical Values of Reverse Current Vs. Reverse Voltage T =125C J .1 0 60 ReverseVoltage- VR(V) T =175C J JunctionCapacitance- C (pF) T InstantaneousForwardCurrent - I (A) F 100 10 T =25C J 100 0 10 20 30 40 50 60 70 80 90100110 1 1.2 1.4 1.6 1.8 2 2.2 ReverseVoltage- V (V) R ForwardVoltage Drop - V (V) FM Fig. 3 - Typical Junction Capacitance Vs. Reverse Voltage Fig. 1 - Maximum Forward Voltage Drop Characteristics Thermal Impedance- Z (C/W) thJC 10 1 .1 D=0.50 D=0.33 D=0.25 D=0.17 D=0.08 P DM t 1 t2 Notes: 1. Duty factor D= t1/ t2 .01 Single Pulse (Thermal Resistance) .001 .00001 .0001 .001 .01 2. PeakT =P x Z +T J DM thJC C .1 1 10 100 t1, RectangularPulseDuration(Seconds) Fig. 4 - Maximum Thermal Impedance ZthJC Characteristics www.irf.com 3 8TQ... Series PD-2.238 rev. A 12/97 7 8TQ RthJC (DC) =2.0C/W 175 AveragePower Loss -(W atts) AllowableCaseTemperature- (C) 180 170 DC 165 160 0 2 4 6 8 10 D=0.08 6 D=0.17 D=0.25 D=0.33 5 D=0.50 4 3 DC RMSLimit 2 1 0 0 12 2 4 6 8 10 12 AverageForwardCurrent - I (A) F(AV) AverageForwardCurrent - IF(AV) (A) Fig. 5 - Maximum Allowable Case Temperature Vs. Average Forward Current Fig. 6 - Forward Power Loss Characteristics 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 - Maximum Non-Repetitive Surge Current 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