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In the interleaved circuit, the two stages are set 180° out of phase to each other. Therefore, the addition of two phases 180o out of phase causes the ripple current to cancel when added. Notice that the ripple current has been significantly reduced from the parallel method. Ripple current cancellation can save significant systems cost as the EMI filter and the output capacitor/s don’t need to attenuate typically high ripple current.
PTM Published on: 2012-01-19
