This paper introduces a systematic approach for deriving modular multiple-input multiple-output (MIMO) converters, with the goal of simultaneously addressing challenges related to limited scalability, cross regulation, complex control, and monotonic output form. The MIMO converters are constructed using modular basic building blocks, facilitating high scalability of both the input and output ports. By carefully selecting connection styles for these building blocks, the cross-regulation issue at the output side is mitigated. This leads to a significant simplification of the control scheme. Moreover, switched resonant tanks are added to allow seamless power transition between DC and AC forms, enabling flexible output forms of MIMO converters. This feature broadens the application scenarios for the derived MIMO converters. A prototype with three output ports is built to illustrate the effectiveness of the proposed derivation methodology.

This paper first presents a systematic extension of basic second-order compensated capacitive power transfer (CPT) converters, designed for achieving load-independent current (LIC) or load-independent voltage (LIV) output, to higher order compensated CPT converters through adding an inductor or capacitor at the input or output side. Conditions on the parameters to achieve the required output are given. The analysis provides a convenient connecting pathway from second-order circuits to higher order circuits, mapping each type of topological extension with the specific performance outcome.

This paper proposes a new single-inductor multi-input multi-output (MIMO) DC-DC converter. The proposed converter allows input sources to be added or removed without affecting the input side and the output side. Meanwhile, output channels are independently controlled. The corresponding control method is the constant current control. When the constant current control is applied to all input cells, the power provided by each source is proportional to the corresponding voltage value. When the constant current control is applied to some of the input cells, the other sources can provide specific power through direct duty-cycle control of input cells. Moreover, the consideration of switching time of switches is unnecessary. 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.

This paper derives a complete family of interconnected dc-dc converters for single-input multi-output applications. In addition to conventional voltage-source-mode (VSM) converters, the less known current-source-mode (CSM) converters are used to complete the set of configurations that cover all possible input types, load types and connection styles. A total of sixteen configurations are derived and compared against their power sharing capability, extended flexibility, mutual effects among interconnected modules, basic control requirements and load characteristics. A two-stage configuration consisting of a VSM converter and two CSM converters is presented as an example to drive light-emitting-diodes (LEDs) under high input voltage conditions.