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| Bulletin PD-2.304 rev. E 03/03 31DQ03 31DQ04 SCHOTTKY RECTIFIER 3.3 Amp Major Ratings and Characteristics Characteristics IF(AV) Rectangular waveform VRRM IFSM @ tp = 5 s sine VF TJ @ 3 Apk, TJ = 25C Description/Features Units A V A V C 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 High frequency operation Guard ring for enhanced ruggedness and long term reliability 31DQ.. 3.3 30/40 450 0.57 - 40 to 150 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 30 31DQ04 40 Absolute Maximum Ratings Parameters IF(AV) Max. Average Forward Current * See Fig. 4 IFSM EAS IAR Max. Peak One Cycle Non-Repetitive Surge Current * See Fig. 6 Non-Repetitive Avalanche Energy Repetitive Avalanche Current 450 90 6.0 1.0 A mJ A 5s Sine or 3s Rect. pulse Following any rated load condition and with 10ms Sine or 6ms Rect. pulse rated VRRM applied 31DQ.. 3.3 Units A Conditions 50% duty cycle @ TC = 73C, rectangular wave form TJ = 25 C, IAS = 1.0 Amps, L = 12 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 * See Fig. 1 (1) 31DQ.. Units 0.57 0.71 0.51 0.62 1 20 190 9.0 10000 V V V V mA mA pF nH V/s @ 3A @ 6A @ 3A @ 6A Conditions TJ = 25 C TJ = 125 C IRM CT LS Max. Reverse Leakage Current * See Fig. 2 (1) Typical Junction Capacitance Typical Series Inductance TJ = 25 C VR = rated VR TJ = 125 C VR = 5VDC (test signal range 100Khz to 1Mhz) 25C Measured lead to lead 5mm from package body (Rated VR) dv/dt Max. Voltage Rate of Change (1) Pulse Width < 300s, Duty Cycle <2% Thermal-Mechanical Specifications Parameters TJ Tstg Max. Storage Temperature Range 31DQ.. Units C C -40 to 150 80 34 Conditions Max. Junction Temperature Range (*) -40 to 150 RthJA Max. Thermal Resistance Junction to Ambient RthJL Typical Thermal Resistance Junction to Lead wt Approximate Weight Case Style (*) dPtot dTj < 1 Rth( j-a) C/W DC operation Without cooling fins C/W With fin 20 x 20 (0.79 x 0.79) 1.0 (0.04) thick. Dimensions in millimeters (inches) 1.2 (0.042) g (oz.) C - 16 thermal runaway condition for a diode on its own heatsink 2 www.irf.com 31DQ03, 31DQ04 Bulletin PD-2.304 rev. E 03/03 100 100 Reverse Current - IR (mA) T J = 150C 10 1 125C 0.1 0.01 25C Instantaneous Forward Current - IF (A) 10 0.001 0 10 20 30 40 Reverse Voltage - VR (V) Fig. 2 - Typical Values Of Reverse Current Vs. Reverse Voltage TJ = 150C TJ = 125C 1 TJ = 25C 1000 Junction Capacitance - CT (pF) T = 25C J 100 0.1 0 0.3 0.6 0.9 1.2 Forward Voltage Drop - VFM (V) Fig. 1 - Max. Forward Voltage Drop Characteristics 10 0 40 80 120 160 200 Reverse Voltage - VR (V) Fig. 3 - Typical Junction Capacitance Vs. Reverse Voltage www.irf.com 3 31DQ03, 31DQ04 Bulletin PD-2.304 rev. E 03/03 150 Allowable Lead Temperature (C) Average Power Loss (Watts) 2.5 D = 0.20 D = 0.25 D = 0.33 D = 0.50 D = 0.75 RMS Limit DC 120 DC 2 90 1.5 60 Square wave (D = 0.50) 80% Rated V applied R 1 30 see note (2) 0.5 0 0 1 2 3 4 5 Average Forward Current - IF(AV) (A) Fig. 4 - Max. Allowable Lead Temperature Vs. Average Forward Current 0 0 1 2 3 4 5 Average Forward Current - IF(AV) (A) Fig. 5- Forward Power Loss Characteristics 1000 Non-Repetitive Surge Current - IFSM (A) 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 1 D 2 Q 3 04 4 TR 5 1 2 3 4 5 - 31 = 3.1A (Axial and small packages - Current is x10) D = DO-41 package Q = Schottky Q.. Series 04 = Voltage Ratings TR = Tape & Reel package (1200 pcs) = Box package (500 pcs) 04 = 40V 03 = 30V 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 |
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