NEW PRODUCT NEW PRODUCT NEW PRODUCT AVALANCHE ALTERNATOR RECTIFIER AS4024 AND AS4028 PASSIVATED ANISOTROPIC RECTIFIER TECHNOLOGY Mean Breakdown Voltage - 24 and 28 volts * D TE CASE STYLE ASC N TE A P 0.953(24.2) 0.937(23.8) FEATURES 0.539(13.7) 0.224(5.7) 0.524(13.3) 0.208(4.3) 0.185(4.7) 0.169(4.3) 0.413(10.5) 0.342(8.7) 0.374(9.5) 0.327(8.3) 0.205(5.2) 0.188(4.8) 0.110(2.8) 0.094(2.4) LEAD 1 0.366(9.3) 0.343(8.7) 0.098 (2.5) MIN. 0.406(10.3) 0.382(9.7) 0.390(9.9) 0.374(9.5) 0.024(5.2) 0.023(.59) 0.087(2.2) 0.071(1.8) 0.197(5.0) 0.185(4.7) 0.028(0.7) 0.012(0.3) Peak Pulse Current - 80 Amperes MECHANICAL DATA 0.205(5.2) 0.188(4.8) LEAD 2/METAL HEATSINK Dimensions in inches and (millimeters) *Patent #Õs ¨ Plastic package has Underwriters Laboratory Flammability Classification 94V-0 ¨ High temperature stability due to unique oxide passivation ¨ Patented Passivated Anisotropic Rectifier (PAR) construction ¨ Integrally molded heatsink provides a very low thermal resistance for maximum heat dissipation ¨ Low leakage current at TJ=175¡C ¨ Low forward voltage drop ¨ Ideally suited for alternator rectification and load dump protection ¨ High temperature soldering guaranteed: 260¡C for 10 seconds at terminals 4,980,315 5,166,769 5,278,094 Case: Molded plastic body, surface mount with heatsink integrally mounted in the encapsulation Terminals: Plated, solderable per MIL-STD-750, Method 2026 Polarity: Unidirectional as marked Mounting Position: Any Weight: 0.095 ounces, 2.68 grams For positive polarity use ÒPÓ.suffix, for negative polarity use ÒNÓ suffix (Polarity refers to lead #1) MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS Ratings at 25¡C ambient temperature unless otherwise specified. SYMBOLS AS4024 AS4028 UNITS Maximum working peak standoff voltage VWM 18.0 20.0 Volts Minimum reverse breakdown voltage at 100mA V(BR) 20.0 24.0 Volts Maximum reverse breakdown voltage at 100mA V(BR) 28.0 32.0 Volts VC 38.0 40.0 Volts Maximum clamping voltage for 10ms/10ms exponentially decaying waveform at IPP=80A Maximum average rectified forward current at TC=150¡C I(AV) 40.0 Amps Peak forward surge current, 8.3ms single half sine-wave IFSM 700.0 Amps Maximum instantaneous forward voltage at 100A (NOTE 1) VF 0.99 Volts Non- repetitive peak reverse surge current for 10ms/10ms exponentially decaying waveform IRSM 75.0 Amps IR 1.0 50.0 mA RQJC 0.9 ¡C/W TJ, TSTG -55 to +200 ¡C Maximum reverse leakage current at rated VWM TJ=25¡C TJ=175¡C Maximum thermal resistance junction to case (NOTE 2) Operating junction and storage temperature range 12/98 NOTE: (1) Measured on a 300ms square pulse width (2) Mounted on alternator heat sink NOTICE: Advanced product information is subject to change without notice. RATING AND CHARACTERISTIC CURVES AVALANCHE ALTERNATOR RECTIFIER - AS4024 AND AS4028 FIG. 2 - TYPICAL INSTANTANEOUS FORWARD CHARACTERISTICS 100 50 45 40 INSTANTANEOUS FORWARD CURRENT, AMPERES FORWARD CURRENT, AMPERES FIG. 1 - FORWARD CURRENT DERATING CURVE 35 30 25 20 15 10 5.0 0 0 20 40 60 80 100 120 140 160 180 200 200¡C 10 175¡C 25¡C 1 0.1 0.01 0.25 0.35 FIG. 3 - PULSE WAVEFORM HALF VALUE - IPP 2 50 0 td 0 5 10/10000ms 10 15 20 25 30 35 10,000 REVERSE SURGE POWER, WATTS IPPM PEAK PULSE CURRENT % tr=10ms 1,000 40 t, TIME, ms FIG. 6 - TYPICAL REVERSE CHARACTERISTICS 100 INSTANTANEOUS REVERS CURRENT, MICRO AMPERES LOAD DUMP POWER, WATTS 3,500 3,000 2,500 2,000 1,500 1,000 500 50 75 100 100 10 1 PULSE WIDTH (ms) - 1/2 IPP EXPONENTIAL WAVEFORM FIG. 5 - LOAD DUMP POWER CHARACTERISTICS (10ms EXPODENTIAL WAVEFORM) 0 25 0.95 FIG. 4. - REVERSE POWER CAPABILITY TA=25¡C PULSE WIDTH (td) is DEFINED as the POINT WHERE the PEAK CURRENT DECAYS to 50% of IPP PEAK VALUE IPPM 0.85 FORWARD VOLTAGE, VOLTS 150 100 0.75 0.65 0.55 0.45 CASE TEMPERATURE, ¡C 150 125 175 200¡C 10 175¡C 1 0.1 25¡C 0.01 0.001 0.0001 5.0 200 TEMPERATURE, ¡C 20 50 35 65 80 95 PERCENTAGE OF V(BR), % TRANSIENT THERMAL IMPEDANCE, ¡C/W FIG. 7 - TYPICAL TRANSIENT THERMAL IMPEDANCE 100 10 1 RQJC 0.1 0.01 0.01 0.1 1 PULSE WIDTH, sec. 10 100