Single-Inductor Multi-Input Multi-Output DC-DC Converter with High Flexibility and Simple Control

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Journal Article
IEEE Transactions on Power Electronics, 2020, 35, (12), pp. 13104-13114
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© 1986-2012 IEEE. Multi-input multi-output (MIMO) dc-dc converters can integrate multiple input sources and output loads simultaneously. This article proposes a new single-inductor MIMO dc-dc converter with a wide conversion ratio. The proposed converter allows input sources to be added or removed seamlessly with no cross-regulation problem. Meanwhile, the outputs are independently controlled, i.e., the load change at one output cell will not affect the other interconnected output cells. Constant current control is the main control requirement. When constant current control is applied to all input cells, the power provided by each input source is proportional to the voltage magnitude of the source. When the constant current control is applied to some of the input cells, the input sources with direct duty-cycle controlled input cells can provide specific power through controlling the duty cycles of the switches of the corresponding input cells. Moreover, the switching time of switches is irrelevant. Therefore, it is easy to realize the high extension capability for arbitrary inputs/outputs. A dual-input dual-output prototype is constructed to illustrate the performance of the proposed converter. The corresponding component design is presented.
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