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UC3843AL-D08-T Datasheet(PDF) 6 Page - Unisonic Technologies |
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UC3843AL-D08-T Datasheet(HTML) 6 Page - Unisonic Technologies |
6 / 9 page UC3842A/3843A LINEAR INTEGRATED CIRCUIT UNISONICTECHNOLOGIESCO.,LTD 6 of 9 www.unisonic.com.tw QW-R103-002.F CURRENT SENSE CIRCUIT 5 3 1 2R R1V C Rs R Is Error Amplifier Current Sense Comparator Peak current (Is) determined by the formula: Ismax=1.0V/Rs. A small RC filter be required to suppress switch transients. SLOPE COMPENSATION A fraction of the oscillator ramp can be resistively summed with the current sense signal to provide slope compensation for converts requiring duty cycles over 50%.Note that capacitor C, forms a filter with R2 to suppress the leading edge switch spikes. OSCILLATOR SECTION Dead time vs. CT(RT>5kΩ) Timing Resistance vs. Frequency |
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