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UC3843AL-S08-R Fiches technique(PDF) 6 Page - Unisonic Technologies |
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UC3843AL-S08-R Fiches technique(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,D 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=10V/Rs. A small RC filter be required to suppress switch transients. SLOPE COMPENSATION 8 4 3 Isense R1 R2 Rsense C RT CT 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 5 4 8 RT CT Large RT Small CT Small RT Large CT V4 V4 INTERNAL CLOCK INTERNAL CLOCK Dead time vs. CT(RT>5kΩ) Timing Resistance vs. Frequency 1 10 100 110 100 0.1 CT (nF) 100 1 10 6 10 5 10 4 10 3 10 10 2 Frequency (Hz) CT=2.2nF CT=4.7nF CT=10nF CT=22nF CT=47nF CT=100nF |
Numéro de pièce similaire - UC3843AL-S08-R |
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Description similaire - UC3843AL-S08-R |
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