Capacitor Input Filter Calculation

Published:2013/10/28 20:20:00 Author:lynne | Keyword: Capacitor Input Filter | From:SeekIC

This is a simple means of calculating the required size of the input filter capacitor in a basic power supply, or calculating the peak-to-peak ripple voltage in an existing supply. It works by assuming that the capacitor supplies current to the load approximately 70% of the cycle—the remaining 30% is supplied directly by the rectified voltage and during this period the capacitor is charged as well. Graphic



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