Figure 3-2 shows the spectrum of the ripple voltage measured at the input capacitor CIN in the single converter implementation and CIN1 in the dual converter implementation. The dual converter implementation obviously shows a lower ripple at the switching frequency. This is mainly caused by the lower current in the individual converters combined with the higher total decoupling capacitance at the input of the converter, since each of the converters uses the same capacitor bank at the input.