A Single-Inductor Multiple-Output Buck/Boost DC–DC Converter With Duty-Cycle and Control-Current Predictor

Zheng, Yanqi; Guo, Jianping; Leung, Ka Nang

doi:10.1109/tpel.2020.2988940

Cited by 35 publications

(29 citation statements)

References 37 publications

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“…To reduce the average inductor current level, the work in [20] allows for the operation modes of outputs within the range of typical buck or mild boost types to include a bypassing cycle. In our scheme, it would be possible to lower the average inductor current level if IPSM A were to include a bypassing cycle.…”

Section: Discussionmentioning

confidence: 99%

“…Illustrated example waveforms of output voltage of a single inductor multiple output single inductor multiple output (SIMO) converter with three outputs. Control scheme utilizing (a) sequential-order-based output selection [6,7,19,20], and (b) error-based output selection of [14].…”

Section: Introductionmentioning

confidence: 99%

“…In a PCCM scheme, to maintain the inductor current at a constant level, it is mandatory to have a freewheeling technique for circulating the inductor current, shunting the freewheeling cycle. Consequently, in any given time slot, it is necessary to include an additional cycle for shunting the inductor, and the implementation thereof increases the circuit [6,7,19,20], and (b) error-based output selection of [14].…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, its design has not been fully investigated in regards to whether it can collectively improve the cross-regulation, efficiency with light loads, and output driving capability. Figure 2 shows power stage of a single inductor buck-boost DC-DC converter and inductor current paths for switching control modes [3,4,[16][17][18][19][20][21][22][23]. There are four possible switching control modes of inductor current paths, which are the energizing inductor (SWE), de-energizing inductor (SWD), bypassing (SWB), and freewheeling path (SWF) [17].…”

Section: Introductionmentioning

confidence: 99%

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Single Inductor Multiple Output Auto-Buck-Boost DC–DC Converter with Error-Driven Randomized Control

Park

Kim

2020

Electronics

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We propose a single inductor multiple output (SIMO) auto-buck-boost DC–DC converter with error-driven randomized control (EDRC). The conventional controls in a SIMO DC–DC converter supply power to outputs that have been selected in a sequential order. Furthermore, they control the inductor current levels at either edge of a switching period in a steady state to be at the same level to alleviate cross-regulation. However, this limits the flexibility of the converter to respond to changes in load requirements. A sequential selection of light loads results in these loads being selected more often than a load demand, degrading the efficiency for light loads. In addition, limited flexibility leads to delayed responses. This paper introduces an auto-buck-boost topology that selects outputs based on output errors, and instantaneously adjusts the inductor current level. Moreover, we propose a technique for allowing any output to avoid selection when all outputs are fully supplied. The proposed EDRC scheme achieves improvements in efficiency in regards to light loads, cross-regulation, and output driving capability.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Single Inductor Multiple Output Auto-Buck-Boost DC–DC Converter with Error-Driven Randomized Control

Park

Kim

2020

Electronics

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“…Different control approaches are proposed in the literature to overcome the cross-regulation issue in a single inductor-based SIMO converter; the current predictor controller is presented in [12] instead of the conventional charge-balance approach. However, generating the duty ratios for active switches has been somewhat complicated.…”

Section: Introductionmentioning

confidence: 99%

A New Multi-Output DC-DC Converter for Electric Vehicle Application

Dhananjaya

Devendra²,

Babu

et al. 2022

IEEE Access

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Multiport converters play a significant role in portable electronic and electric vehicle (EV) applications. In literature, different configurations of single-input multi-output (SIMO) converters are presented. Most of the SIMO converters generate the outputs with operating constraints on the duty ratio and charging of inductors. The cross-regulation problem is still a challenge in SIMO converters design. A SIMO topology is proposed in this study to overcome the limitations mentioned earlier. It can generate three different output voltages without constraint on the duty cycle and inductor currents (like iL1 > iL2 > iL3 or iL1 < iL2 < iL3). Cross regulation problems do not exist in the proposed topology, so the load voltage V01 (V02) (V03) is not affected by the variation of output current i03 (i02) (i01). The loads are isolated from each other during control. In the laboratory, a 200 W prototype circuit is developed; simulation and experimental results are validated.INDEX TERMS Multiport converters, single input multi output converters.

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Multi‐input multi‐output converter for simultaneous buck and boost voltage conversion

Dhananjaya¹,

Ali

Potnuru

et al. 2023

Circuit Theory & Apps

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SummaryInternet of Things (IoT) devices, portable electronics, and electric vehicle (EV) accessories have increased the need for DC power distribution with various outputs. Multiport converters (MPCs) handle numerous inputs and loads with fewer components, low power losses, and less cost. Most multi‐input converters are time‐shared and restrict the duty cycle's working range, limiting energy sources and output voltage. Single‐input multi‐output (SIMO) converters have inductor current and duty cycle limits. In this study, a dual‐input dual‐output (DIDO) converter is proposed to overcome the limitations mentioned above. It can operate multiple loads without restrictions on charging inductor currents and cross‐regulation problems. Any variations will not influence the proposed converter's output voltage VO1 (VO2) by the load current iO2 (iO1). To verify the feasibility of the proposed configuration, a 250 W laboratory prototype has been developed, and experimental results are validated.

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A Single-Inductor Multiple-Output Buck/Boost DC–DC Converter With Duty-Cycle and Control-Current Predictor

Cited by 35 publications

References 37 publications

Single Inductor Multiple Output Auto-Buck-Boost DC–DC Converter with Error-Driven Randomized Control

Single Inductor Multiple Output Auto-Buck-Boost DC–DC Converter with Error-Driven Randomized Control

A New Multi-Output DC-DC Converter for Electric Vehicle Application

Multi‐input multi‐output converter for simultaneous buck and boost voltage conversion

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