21FQ IRF | Alldatasheet

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21FQ... SERIES PD-2.043 rev. D 12/97 1www.irf.com Dimensions in millimeters and inches Conforms to JEDEC Outline DO-203AA (DO-4) CASE STYLE AND DIMENSIONS The 21FQ Schottky rectifier series has been optimized for very low forward voltage drop, with moderate leakage. The proprietary barrier technology allows for reliable operation up to 150° C junction temperature. Typical applications are in switching power supplies, converters, free-wheeling diodes, and reverse battery protection. 150° C T J operation Very low forward voltage drop High frequency operation Guard ring for enhanced ruggedness and long term reliability Hermetic packaging IF(AV) Rectangular 30 A waveform VRRM range 35 to 45 V IFSM @ tp = 5 µs sine 7800 A V F @ 30 Apk, TJ = 125°C 0.51 V TJ range - 65 to 150 °C Characteristics 21FQ... Units Major Ratings and Characteristics Description/Features

21FQ... Series PD-2.043 rev. D 12/97 www.irf.com VFM Max. Forward Voltage Drop (1)0.57 V @ 30A * See Fig. 1 0.69 V @ 60A

0.51 V @ 30A

0.65 V @ 60A

IRM Max. Reverse Leakage Current (1) 4 mA T J = 25 °C * See Fig. 2 150 mA T J = 125 °C CT Max. Junction Capacitance 1850 pF V R = 5VDC , (test signal range 100Khz to 1Mhz) 25 °C LS Typical Series Inductance 6.5 nH Measured from top of terminal to mounting plane dv/dt Max. Voltage Rate of Change 10,000 V/ µs (Rated VR) TJ = 25 °C TJ = 125 °C VR = rated VR Electrical Specifications Parameters 21FQ Units Conditions (1) Pulse Width < 300µs, Duty Cycle < 2% TJ Max. Junction Temperature Range -65 to 150 °C Tstg Max. Storage Temperature Range -65 to 150 °C R thJC Max. Thermal Resistance Junction1.25 °C/W DC operation * See Fig. 4 to Case R thCS Typical Thermal Resistance, Case to0.50 °C/W Mounting surface , smooth and greased Heatsink wt Approximate Weight 5.8 (0.2) g (oz.) T Mounting Torque Min. 14 (12) Non-lubricated threads Max. 23 (20) Case Style DO-203AA(DO-4) JEDEC Kg-cm (Ibf-in) Thermal-Mechanical Specifications Parameters 21FQ Units Conditions IF(AV) Max. Average Forward Current 30 A 50% duty cycle @ T C = 107 °C, rectangular wave form * See Fig. 5 IFSM Max. Peak One Cycle Non-Repetitive7800 5µs Sine or 3µs Rect. pulse Surge Current * See Fig. 7 600 10ms Sine or 6ms Rect. pulse EAS Non-Repetitive Avalanche Energy 40 mJ T J = 25 °C, IAS = 6 Amps, L = 2.2 mH IAR Repetitive Avalanche Current 6 A Current decaying linearly to zero in 1 µsec Frequency limited by TJ max. VA = 1.5 x VR typical Parameters 21FQ Units Conditions A Absolute Maximum Ratings Following any rated load condition and with rated V RRM applied Part number 21FQ035 21FQ040 21FQ045 VR Max. DC Reverse Voltage (V) VRWM Max. Working Peak Reverse Voltage (V) 35 40 45 Voltage Ratings

21FQ... Series PD-2.043 rev. D 12/97 www.irf.com Fig. 2 - Typical Values of Reverse Current Vs. Reverse Voltage Fig. 3 - Typical Junction Capacitance Vs. Reverse Voltage Fig. 4 - Maximum Thermal Impedance ZthJC Characteristics .001 .01 100 1000 0 5 10 15 20 25 30 35 40 45 R R 125°C 100°C 75°C 50°C 25°C Reverse Vol tage - V (V) Reverse Current - I (mA) T = 150°CJ .001 .01 D = 0.33 D = 0.50 D = 0.25 D = 0.17 D = 0.08 thJC t , Rectangular Pulse Duration (Seconds) Thermal Impedance - Z (°C/W) S ingle P ulse (Thermal Resistance) PDM Notes: 1. D uty factor D = t / t 2. Peak T = P x Z + T JD M thJC C Fig. 1 - Maximum Forward Voltage Drop Characteristics 100 1000 10000 0 1 02 03 04 05 0 T = 25°CJ Reverse Voltage - V (V)R TJunction Capacitance - C (pF) 100 1000 FM FInstantaneous Forward Current - I (A) Forward Voltage Drop - V (V) T = 150°C T = 125°C T = 25°C J J J

21FQ... Series PD-2.043 rev. D 12/97 www.irf.com Fig. 8 - Unclamped Inductive Test Circuit Fig. 5 - Maximum Allowable Case Temperature Vs. Average Forward Current Fig. 6 - Forward Power Loss Characteristics Fig. 7 - Maximum Non-Repetitive Surge Current 115 125 135 145 155 0 5 10 15 20 25 30 35 40 45 DC Allowable Case Temperature - (°C) Average Forward Current - I (A)F( AV) 21FQ R (D C ) = 1.25°C/WthJC 0 5 10 15 20 25 30 35 40 4 DC Average Power Loss - (Watts) F(AV) D = 0.08 D = 0.17 D = 0.25 D = 0.33 D = 0.50 RMS Limit A verage F orw ard C urrent - I (A ) 100 1000 10000 10 100 1000 10000 FSM p Non-Repetitive Surge Current - I (A) At Any Rated Load Condition And With Rated V Applied Following Surge RRM Square Wave Pulse Duration - t (microsec) FREE-WHEEL DIODE 40HFL40S02CURRENT MONITOR HIGH-SPEED SWITCHIRFP460 L DUT Rg = 25 ohm Vd = 25 Volt+