BYW178 Fast Recovery Rectifier VOLTAGE RANGE: 800 V CURRENT: 3.0 A DO - 27 Features Low cos t Diffus ed junction Low leakage Low forward voltage drop High current capability Eas ily cleaned with Freon Alcohol,Is opropanol and s im ilar s olvents Mechanical Data Cas e: JEDEC DO--27,m olded plas tic Polarity: Color band denotes cathode Weight: 0.041ounces , 1.15 gram s Dimensions in millimeters Mounting pos ition: Any MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS Ratings at 25 am bient tem perature unles s otherwis e s pecified. Single phas e,half wave,50Hz,res is tive or inductive load. For capacitive load,derate by 20%. BYW 178 UNITS Maximum recurrent peak reverse voltage VR R M 800 V Maximum RMS voltage V R MS 560 V Maximum DC blocking voltage VD C 800 V IF (AV) 3.0 A IF SM 80 A VF 1.9 V Maximum average f orw ard rectif ied current @TA =75 9.5mm lead length, Peak f orw ard surge current 10ms single half-sine-w ave superimposed on rated load @TJ =125 Maximum instantaneous forw ard voltage @ 3.0 A Maximum reverse current at rated DC blocking voltage @TA =25 @TA =100 IR 1.0 A 20 Maximum reverse recovery time (Note1) t rr 60 ns Typical junction capacitance (Note2) CJ 32 pF Typical thermal resistance (Note3) Rθ JA 70 TJ -55-----+150 TSTG -55-----+150 Operating junction temperature range Storage temperature range N OTE:1. Measured with I F =0.5A, I R=1A, I rr=0.25A. 2. Measured at 1.0MH Z and applied rev erse v oltage of 4.0V D C . 3. Therm al resistance f rom junction to am bient. http://www.luguang.cn mail:[email protected] /W BYW178 Fast Recovery Rectifier Ratings AND Charactieristic Curves FIG.1 -- REVERSE RECOVERY TIME CHARACTERISTIC AND TEST CIRCUIT DIAGRAM 50 N.1. t rr 10 N.1. +0.5A D.U.T. ( - ) 0 PULSE GENERATOR (NOTE2) (+) 50VDC (APPROX) (-) OSCILLOSCOPE (NOTE 1) 1 N.1. -0.25A ( + ) -1.0A NOTES:1.RISETIME=7ns MAX. INPUT IMPEDANCE=1M .22pF 2.RISETIME=10ns MAX. SOURCEIMPEDANCE=5O FIG.3 --PEAK FORWARD SURGE CURRENT 3.0 2.4 1.8 Single Phase Half Walf 60Hz Resistive or Inductive Load 0.6 0 0 25 50 75 100 125 150 175 PEAK FORWARD SURGE CURRENT AMPERES AVERAGE FORWARD RECTIFIED CURRENT AMPERES FIG.2 --FORWARD DERATING CURVE 1.2 100 TJ =125 8.3ms Single Half Sine-Wave 80 60 40 20 0 1 AMBIENT TEMPERATURE, 2 4 6 10 20 40 60 100 NUMBER OF CYCLES AT 60 Hz FIG.4--TYPICAL FORWARD CHARACTERISTIC FIG.5-- TYPICAL JUNCTION CAPACITANCE 100 10 TJ =25 Pulse Width=300 µS 4 2 1.0 0.4 0.2 0.1 0.06 0.04 0.02 0.01 0.9 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.3 INSTANTANEOUS FORWARD VOLTAGE,VOLTS http://www.luguang.cn JUNCTION CAPACITANCE pF INSTANTANEOUS REVERSE CURRENT AMPERES 1 cm SET TIMEBASEFOR 25 ns /cm 100 60 40 20 10 4 TJ=25 f=1MHz 2 1 .1 .2 .4 1.0 2 4 10 20 REVERSE VOLTAGE,VOLTS mail:[email protected] 40 100