Working Paper Article Version 1 This version is not peer-reviewed

Decentralized Phase-Shedding with Low Power Mode for Multiphase Converter

Version 1 : Received: 15 August 2021 / Approved: 17 August 2021 / Online: 17 August 2021 (08:25:32 CEST)

How to cite: Cousineau, M.; Monroy, M.; Lorenzi Pol, W.; Hureau, L.; Aulagnier, G.; Goyhenetche, P.; Rolland, E.; Flumian, D. Decentralized Phase-Shedding with Low Power Mode for Multiphase Converter. Preprints 2021, 2021080349 Cousineau, M.; Monroy, M.; Lorenzi Pol, W.; Hureau, L.; Aulagnier, G.; Goyhenetche, P.; Rolland, E.; Flumian, D. Decentralized Phase-Shedding with Low Power Mode for Multiphase Converter. Preprints 2021, 2021080349

Abstract

This article presents a decentralized phase-shedding technique for multiphase converters. The usual central digital controller is replaced by identical local controllers forming a daisy-chain structure. Phase-shedding decisions are taken locally based on a local inductor current monitoring and threshold crossing management. This control strategy allows to implement as many phases as desired in a modular manner. In order to handle specific events such as load current inrush or a start-up sequence and to guarantee optimal transient responses, additional functions are included into each local controllers. The inter-cell communication protocol is described, along with necessary design considerations of threshold and timing values. Finally, functional simulations are carried out on a 5-leg 12V/1.2V 60W multiphase converter, which validate the proposed decentralized phase-shedding strategy for a microcontroller power supply implementation.

Keywords

Multiphase converter; Phase-Shedding; Decentralized Control

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