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Boost DC-to-DC converters have very good source interface properties. The input inductor makes the source current smooth and hence these converters provide very good EMI performance. On account of this good property, the boost converter is also the preferred converter for off-line UPF rectifiers. One of the issues of concern in these converters is the large size of the storage capacitor on the DC...
The boost rectifier, when operated in discontinuous conduction mode and constant duty ratio, has a power factor less than unity, which approaches unity at the expense of high conversion ratios. The proposed control scheme corrects this problem by providing unity power factor, even for low conversion ratios, in an open loop fashion at constant switching frequency.
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