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AX3842S Datasheet(PDF) 8 Page - List of Unclassifed Manufacturers |
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8 / 12 page Page No. : 8/12 AVANTICS - AX3842 Series Specification No.: 050308-FE0008 Current Sense Circuit Slope Compensation Techniques Isolated MOSFET Drive and Current Transformer Sensing Peak current (Is) is determined by the formula Is(max.) ≈ 1V/Rs A small RC filter may be required to suppress switch transients. R Rs C 2R COMP Is Current Sense GND 1 3 5 Error Ampl. R1V Current Sense Comparator 5.0Vref + + + - - Vcc S R Q COMP/Latch C R Rs Ns Np Q1 Vin Isolation Boundary 3 6 7 VGS Waveforms 50%DC 25%DC Ipk=((Vpin1-1.4)/3Rs)(Ns/Np) + 0 - + 0 - R1 8 Rs 5 R 4 RT 3 CT SLOPE AX3842 Is VREG RT/CT ISENSE GND R1 8 Rs 5 R 4 RT 3 CT SLOPE AX3842 Is VREG RT/CT ISENSE GND |
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