A Symmetrical Digital Selecting Type DC-DC Converter with Power Saving Techniques

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Abstract:

To achieve various conversion ratios with high power efficiency, a symmetrical digital selecting type switched-capacitor (SC) DC-DC converter with power saving techniques is proposed in this paper. Unlike conventional SC DC-DC converters, the voltage ratio of capacitors is expressed as the ratio of a power of two. By combining some of these capacitors in series, the proposed converter can achieve a larger number of conversion ratios than conventional converters. Furthermore, by employing a symmetrical structure with power saving techniques, the proposed converter can alleviate energy loss due to stray parasitic capacitance. The theoretical analysis and SPICE simulations show the effectiveness of the proposed converter.

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77-81

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October 2014

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© 2014 Trans Tech Publications Ltd. All Rights Reserved

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