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Research Paper | Electrical & Electronics Engineering | India | Volume 2 Issue 6, June 2013
Single-Inductor Dual-Output Buck Converters with Mix-Voltage Conversion
Tomina Thomas | T.Jothi
Abstract: A single-inductor dual-output (SIDO) buck converter has recently found applications in hand-held battery-powered electronic devices. The circuit operation and the functional interdependencies among basic converter parameters such as dc voltage gains, transistor duty cycles, and load current levels are much more complicated than those of the single-output counterpart. In this project, a rigorous analysis was conducted to develop dc equations in steady state operation for SIDO converters. More importantly, from the analysis results, a possibility of a new mode of operation, dubbed mix-voltage operation, will be pointed out. In the so-called mix-voltage operation, the converter is capable of working even when the input voltage is lower than one of the two output voltages. In the past, a SIDO buck converter has been used for providing pure-buck outputs, i. e. , both output voltages are lower than the input voltage. Therefore, this possibility not only opens up new applications but also extends the operating battery range in existing applications. Experimental results confirmed the dc equations and the mix-voltage conversion of SIDO buck converters.
Keywords: DC Power converters, mix-voltage conversion, single inductor dual output SIDO
Edition: Volume 2 Issue 6, June 2013,
Pages: 173 - 176
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