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A new digital current control technique for DC–DC switching converters operating indistinctly in continuous (CCM) or in discontinuous (DCM) conduction mode is reported. The control method consists in predicting the switching instant at which the current inductor reaches a reference by taking two samples of this current and computing the equation of a straight line. The resulting predictive digital interpolation current control (PDICC) does not require the previous knowledge of converter parameters, it is based on the same principles than the classical analogue current control methods and maintains similar dynamic characteristics.
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Carrejo et al. (2009) studied this question.
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