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| ANSALDO Ansaldo Trasporti s.p.a. Unita' Semiconduttori Via N. Lorenzi 8 - I 16152 GENOVA - ITALY Tel. int. +39/(0)10 6556549 - (0)10 6556488 Fax Int. +39/(0)10 6442510 Tx 270318 ANSUSE I - FAST RECOVERY DIODE ARF678 Repetitive voltage up to Mean forward current Surge current 4500 V 1690 A 27 kA FINAL SPECIFICATION apr 97 - ISSUE : 01 Symbol Characteristic Conditions Tj [C] Value Unit BLOCKING V RRM V RSM I RRM Repetitive peak reverse voltage Non-repetitive peak reverse voltage Repetitive peak reverse current V=VRRM 150 150 150 4500 4600 150 V V mA CONDUCTING I I I F (AV) Mean forward current Mean forward current Surge forward current I t Forward voltage Threshold voltage Forward slope resistance 180 sin ,50 Hz, Th=55C, double side cooled 180 square,50 Hz,Th=55C,double side cooled Sine wave, 10 ms reapplied reverse voltage up to 50% VRSM 150 1690 1735 27 2880 x1E3 A A kA As V V mohm F (AV) FSM I t V FM V F(TO) r F Forward current = 2000 A 25 150 150 2.40 1.30 0.650 SWITCHING t rr Q rr I rr s V FR Reverse recovery time Reverse recovery charge Peak reverse recovery current Softness (s-factor), min Peak forward recovery di/dt= 400 A/s 150 I F = 1000 A di/dt= VR = 250 A/s 50 V 650 0.5 40 V A 150 4.2 1350 s C MOUNTING R th(j-h) T F j Thermal impedance Operating junction temperature Mounting force Mass Junction to heatsink, double side cooled 14.0 -30 / 150 35.0 / 40.0 850 C/kW C kN g ORDERING INFORMATION : ARF678 S 45 standard specification VRRM/100 ARF678 FAST RECOVERY DIODE FINAL SPECIFICATION apr 97 - ISSUE : 01 ANSALDO DISSIPATION CHARACTERISTICS SQUARE WAVE 7000 DC 6000 90 120 180 Power Dissipation [W] 5000 60 4000 3000 2000 1000 0 0 500 30 1000 1500 2000 2500 Mean Forward Current [A] SINE WAVE 7000 180 6000 90 120 Power Dissipation [W] 5000 30 60 4000 3000 2000 1000 0 0 500 1000 1500 2000 2500 Mean Forward Current [A] ARF678 FAST RECOVERY DIODE FINAL SPECIFICATION apr 97 - ISSUE : 01 ANSALDO SWITCHING CHARACTERISTICS FORWARD RECOVERY VOLTAGE 80 70 60 50 VFR [V] 40 30 20 VF 10 0 0 200 400 600 di/dt [A/s] 800 1000 1200 Tj = 25 C Tj = 150 C IF VFR REVERSE RECOVERY CHARGE Tj=150C 1600 1400 500 A 1000 A REVERSE RECOVERY CURRENT Tj=150C 800 750 700 650 600 250 A 1000 A 500 A 250 A 1200 1000 Qrr [C] 800 600 400 200 0 0 100 200 di/dt [A/s] 300 400 550 500 Irr [A] 450 400 350 300 250 200 150 100 50 0 0 100 200 di/dt [A/s] 300 400 ta = Irr / (di/dt) tb = trr - ta IF d i/d t ta tb Softness (s factor) s = tb / ta Energy dissipation during recovery Er = Vr * (Qrr - Irr *ta / 2 ) Irr Vr ARF678 FAST RECOVERY DIODE FINAL SPECIFICATION apr 97 - ISSUE : 01 ANSALDO FORWARD CHARACTERISTIC Tj = 150 C SURGE CHARACTERISTIC Tj = 150 C 6000 30 5000 25 Forward Current [A] 4000 ITSM [kA] 0.6 1.6 2.6 3.6 4.6 5.6 20 3000 15 2000 10 1000 5 0 Forward Voltage [V] 0 1 10 n cycles 100 TRANSIENT THERMAL IMPEDANCE DOUBLE SIDE COOLED 14.0 12.0 10.0 Zth j-h [C/kW] 8.0 6.0 4.0 2.0 0.0 0.001 0.01 0.1 t[s] 1 10 100 Distributed by All the characteristics given in this data sheet are guaranteed only with clamping force, cleaned and lubricated heatsink, surfaces with flatness < and roughness < 2 m. In the interest of product improvement ANSALDO reserves the right to any data given in this data sheet at any time without previous notice. If not stated otherwise the maximum value of ratings (simbols over background) and characteristics is reported. uniform .03 mm change shaded |
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