Single-Inductor Bipolar-Outputs Converter for the Supply of Audio Amplifiers in Mobile Platforms

Begaud, Xavier; Allard, Bruno; Lin-Shi, Xuefang; Chesneau, David

doi:10.1109/tpel.2013.2238252

Cited by 14 publications

(9 citation statements)

References 7 publications

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“…The first idea of SIMO converter has been proposed in [28]. Many different structures of SIMO have been developed [29][30][31][32]. These types of converters can be classified to tree topologies: SIMO same-type converters, SIMO bipolar converters and SIMO mixed-type converters.…”

Section: Introductionmentioning

confidence: 99%

Ripple base signal flow graph modelling of DC–DC switching converters

Abbasi

Afifi

Pahlavani

2019

IET Power Electronics

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A new ripple base signal flow graph (R-SFG) modelling method was proposed to accurately model and analyse a family of switching DC-DC converter. The performance of some DC-DC converters such as single-inductor multi-output converters is dependent on inductor current ripples. This makes the conventional modelling methods cannot fully predict the overall behaviour of converter. From this family and in this study, a single-inductor dual-output (SIDO) boost/boost converter has been modelled based on proposed R-SFG method. The simplicity and systematic procedure presented in this work showed that the R-SFG could be a good alternative for modelling switching converter with complicated structures and with high inductor current ripple. In the new R-SFG method, the effects of inductor current ripple have been considered to develop the conventional signal flow graph modelling method. In this work, a comparative study between two modelling methods has been carried out in a SIDO converter. A step-by-step direct mathematical manipulation was used to calculate the DC-DC transfer function of SIDO converter. The experimental results were included to show the validity of the obtained models. The experimental results showed that the maximum R-SFG modelling error was about 5% over the wide range of inductor current ripple.

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Section: Introductionmentioning

confidence: 99%

Ripple base signal flow graph modelling of DC–DC switching converters

Abbasi

Afifi

Pahlavani

2019

IET Power Electronics

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“…In high-power conversion applications, to achieve minimisation by removing the bulky transformers, cost and weight, the single inductor multi-output (SIMO) converters are the pretty good solution [10][11][12][13][14]. In these types of converters, an inductor is charged and then delivers its stored energy to outputs through active switches.…”

Section: Introductionmentioning

confidence: 99%

Signal flow graph modelling of a switching converter with single inductor triple output DC–DC structure

Abbasi

Afifi

Pahlavani

2018

IET Power Electronics

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This study describes the systematic signal flow graph (SFG) modelling of a single inductor triple output (SITO) DC/DC converters. The multi-stages operation of SITO converter and the parasitic elements cause obtaining a model to predict the all behaviours of converter be more difficult than typical converters. By SFG method, all small-signal transfer functions can be derived. Derivations of large-signal, small-signal and steady-state models are demonstrated by considering a single inductor triple output boost/boost convert. The effect of inductor ripple current has been considered to determine the acceptable region of SFG modelling method. Simulation and experimental results are included to show the validity of the obtained model.

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“…However, some drawbacks such as electromagnetic interference, component cost and physical profile strongly discourage the use of multiple inductors. As a result, single-inductor multiple-output (SIMO) dc-dc converters are favourable in IC applications since they are area-and cost-effective, and each of the outputs has flexible conversion ratio [1]- [18], [32]- [34], [39]. Unfortunately, the increased complexity of the SIMO dc-dc converters also implies more design challenges, specifically in power efficiency, driving capability, transient responses and cross-regulation.…”

Section: Introductionmentioning

confidence: 99%

A Single-Inductor Multiple-Output Auto-Buck-Boost DC–DC Converter With Autophase Allocation

Zheng

Guo

et al. 2016

IEEE Trans. Power Electron.

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A single-inductor multiple-output (SIMO) converter with auto-buck-boost feature is presented in this paper. A seamless auto-buck-boost scheme for SIMO dc-dc converter using time-multiplexing control is proposed. Additionally, with the proposed first-order phase lock loop (FOPLL) and autophase allocation, this circuit solves the problem of unbalanced loadings of different channels, and it also keeps the locking time of the inductor current sufficiently short to minimize average inductor current for attaining higher efficiency. By combining with all channel controllers, FOPLL not only allows fast loadtransient response without degrading the power efficiency, but it also reduces controller order of the frequency control loop, attenuates the noise injected from charge pump and achieves robust stability. The scheme enables the dc-dc converter to operate from wide input and output ranges. Implemented in a 0.35-µm CMOS technology, the chip area is 5000 µm × 1850 µm, including ESD test pads. The switching frequency is fixed at 0.25 MHz. The load-transient response time is less than 100 s. The proposed converter achieves a peak efficiency of 89% and maximum output power up to 1.46 W with efficiency of 70%.Index Terms-Auto-buck-boost, SIMO dc-dc converters, timemultiplexing control.

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Single-Inductor Bipolar-Outputs Converter for the Supply of Audio Amplifiers in Mobile Platforms

Cited by 14 publications

References 7 publications

Ripple base signal flow graph modelling of DC–DC switching converters

Ripple base signal flow graph modelling of DC–DC switching converters

Signal flow graph modelling of a switching converter with single inductor triple output DC–DC structure

A Single-Inductor Multiple-Output Auto-Buck-Boost DC–DC Converter With Autophase Allocation

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