Bulletin PD-2.304 rev. E 03/03 31DQ03 31DQ04 3.3 Amp SCHOTTKY RECTIFIER Description/Features Major Ratings and Characteristics Characteristics 31DQ.. Units IF(AV) Rectangular waveform 3.3 A 30/40 V IFSM @ tp = 5 µs sine 450 A VF 0.57 V - 40 to 150 °C VRRM The 31DQ.. axial leaded Schottky rectifier has been optimized for very low forward voltage drop, with moderate leakage. Typical applications are in switching power supplies, converters, free-wheeling diodes, and reverse battery protection. Low profile, axial leaded outline High purity, high temperature epoxy encapsulation for enhanced mechanical strength and moisture resistance Very low forward voltage drop @ 3 Apk, TJ = 25°C TJ High frequency operation Guard ring for enhanced ruggedness and long term reliability CASE STYLE AND DIMENSIONS Outline C - 16 Dimensions in millimeters and inches www.irf.com 1 31DQ03, 31DQ04 Bulletin PD-2.304 rev. E 03/03 Voltage Ratings Part number VR Max. DC Reverse Voltage (V) VRWM Max. Working Peak Reverse Voltage (V) 31DQ03 31DQ04 30 40 Absolute Maximum Ratings Parameters IF(AV) Max. Average Forward Current 31DQ.. Units 3.3 A Conditions 50% duty cycle @ TC = 73°C, rectangular wave form * See Fig. 4 IFSM Max. Peak One Cycle Non-Repetitive 450 5µs Sine or 3µs Rect. pulse Following any rated load condition and with 10ms Sine or 6ms Rect. pulse rated VRRM applied A Surge Current * See Fig. 6 90 EAS Non-Repetitive Avalanche Energy 6.0 mJ IAR Repetitive Avalanche Current 1.0 A TJ = 25 °C, IAS = 1.0 Amps, L = 12 mH Current decaying linearly to zero in 1 µsec Frequency limited by TJ max. VA = 1.5 x VR typical Electrical Specifications Parameters VFM 31DQ.. Units Max. Forward Voltage Drop * See Fig. 1 (1) IRM Max. Reverse Leakage Current CT * See Fig. 2 (1) Typical Junction Capacitance LS Typical Series Inductance dv/dt Max. Voltage Rate of Change Conditions 0.57 0.71 0.51 V V V @ 3A @ 6A @ 3A 0.62 V @ 6A 1 mA 20 190 mA pF 9.0 nH 10000 V/µs TJ = 25 °C TJ = 125 °C TJ = 25 °C VR = rated VR TJ = 125 °C VR = 5VDC (test signal range 100Khz to 1Mhz) 25°C Measured lead to lead 5mm from package body (Rated VR) (1) Pulse Width < 300µs, Duty Cycle <2% Thermal-Mechanical Specifications Parameters 31DQ.. Units TJ Max. Junction Temperature Range (*) -40 to 150 °C Tstg Max. Storage Temperature Range °C -40 to 150 Conditions RthJA Max. Thermal Resistance Junction to Ambient 80 °C/W DC operation Without cooling fins RthJL Typical Thermal Resistance Junction to Lead 34 °C/W With fin 20 x 20 (0.79 x 0.79) 1.0 (0.04) thick. Dimensions in millimeters (inches) wt Approximate Weight Case Style (*) dPtot dTj 2 < 1 Rth( j-a) 1.2 (0.042) g (oz.) C - 16 thermal runaway condition for a diode on its own heatsink www.irf.com 31DQ03, 31DQ04 Bulletin PD-2.304 rev. E 03/03 100 T J = 150˚C 10 Reverse Current - IR (mA) Instantaneous Forward Current - IF (A) 100 10 125˚C 1 0.1 0.01 25˚C 0.001 0 10 20 30 40 Reverse Voltage - VR (V) Fig. 2 - Typical Values Of Reverse Current Vs. Reverse Voltage TJ = 150˚C TJ = 125˚C 1 TJ = 25˚C 0.1 0 0.3 0.6 0.9 1.2 Forward Voltage Drop - VFM (V) Junction Capacitance - CT (pF) 1000 T = 25˚C J 100 10 0 40 80 120 160 200 Fig. 1 - Max. Forward Voltage Drop Characteristics Reverse Voltage - VR (V) Fig. 3 - Typical Junction Capacitance Vs. Reverse Voltage www.irf.com 3 31DQ03, 31DQ04 Bulletin PD-2.304 rev. E 03/03 2.5 Average Power Loss (Watts) Allowable Lead Temperature (°C) 150 120 DC 90 60 Square wave (D = 0.50) 80% Rated VR applied 30 D = 0.20 D = 0.25 D = 0.33 D = 0.50 D = 0.75 2 1.5 DC RMS Limit 1 0.5 see note (2) 0 0 1 2 3 4 0 5 0 Average Forward Current - IF(AV) (A) 1 2 3 4 5 Average Forward Current - IF(AV) (A) Fig. 4 - Max. Allowable Lead Temperature Vs. Average Forward Current Fig. 5- Forward Power Loss Characteristics Non-Repetitive Surge Current - IFSM (A) 1000 100 At Any Rated Load Condition And With Rated VRRM Applied Following Surge 10 10 100 1000 10000 Square Wave Pulse Duration - tp (microsec) Fig. 6 - Max. Non-Repetitive Surge Current (2) Formula used: TC = TJ - (Pd + PdREV) x RthJC ; Pd = Forward Power Loss = IF(AV) x VFM @ (IF(AV) / D) (see Fig. 6); PdREV = Inverse Power Loss = VR1 x IR (1 - D); IR @ VR1 = 80% rated VR 4 www.irf.com 31DQ03, 31DQ04 Bulletin PD-2.304 rev. E 03/03 Ordering Information Table Device Code 31 D Q 04 TR 1 2 3 4 5 1 - 2 - 31 = 3.1A (Axial and small packages - Current is x10) D = DO-41 package 3 - Q = Schottky Q.. Series 04 = 40V 4 - 04 = Voltage Ratings 03 = 30V 5 - TR = Tape & Reel package (1200 pcs) - = Box package (500 pcs) 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. 03/03 www.irf.com 5