Abstract
This paper reviews and discusses the state of the art of integrated switched-capacitor and integrated inductive power converters and provides a perspective on progress towards the realization of efficient and fully integrated DC–DC power conversion. A comparative assessment has been presented to review the salient features in the utilization of transistor technology between the switched-capacitor and switched inductor converter-based approaches. First, applications that drive the need for integrated switching power converters are introduced, and further implementation issues to be addressed also are discussed. Second, different control and modulation strategies applied to integrated switched-capacitor (voltage conversion ratio control, duty cycle control, switching frequency modulation, Ron modulation, and series low drop out) and inductive converters (pulse width modulation and pulse frequency modulation) are then discussed. Finally, a complete set of integrated power converters are related in terms of their conditions and operation metrics, thereby allowing a categorization to provide the suitability of converter technologies.
Highlights
This paper presented the technologies, modulation strategies, and control schemes of integrated switching power converters, both switched-capacitor and switched-inductive networks
For the integrated switched-capacitor converters, a clear trade-off between peak efficiency and power density has been presented graphically to distinguish between MIM, Silicon-on insulator (SOI), and trench capacitor technologies
From the various control strategies of SCPCs, it was observed that the switching losses could be greatly reduced using the switching-frequency modulation technique, but at the same time, it enhanced the noise significantly
Summary
Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations. On-the other hand, switch-mode regulators consist of a controllable switch and one or more energy storage elements, such as an inductor and a capacitor, which allow both step-up and stepdown voltage conversions. Energy density of capacitors is 100–1000 times more [2] This makes Switched capacitor converters (SCCs) to be of excessive power-density converters and are accessible in reduced circuit volume [3,4]. The applications maintain a stringent requirement on small volume In this direction, switch-mode power converters with a small form factor are gaining interest due to the addition of integrated reactive components; i.e., no external capacitors or inductors. The following design is carried out in such way that integrated switch-mode converters produce sections emphasize switched capacitors and switched-inductor converters and more efficiency thanintegrated linear regulators. Inductors using the performance metrics are discussed, and the conclusions are presented
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