A DC–DC buck converter with load-regulation improvement using dual-path-feedback techniques

Chen, Jiann‐Jong; Hsu, Jui-Hsuan; Hwang, Yuh‐Shyan; Yu, Cheng‐Chieh

doi:10.1007/s10470-014-0268-2

Cited by 5 publications

(4 citation statements)

References 20 publications

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“…The efficiency of the buck circuit topology described in [3] is 94%, the efficiency of the buck circuit topology described in [17] is 95% for load current of 400 mA and 75% for load current of 500 mA and the efficiency of the buck circuit topology described in [18] is 88.2%. For the buck topologies described in [3, 17, 18], the input power source is supplying power only to the output load and does not supply power to the different components in the circuit like op‐amp etc., yet the efficiency of these topologies is compromised, while for the buck topology shown in Fig. 4, the supercapacitor modules are simultaneously supplying power to the output load and to all the components in it, yet the efficiency is 77.6% which is an acceptably good value.…”

Section: Resultsmentioning

confidence: 99%

“…This buck topology is designed to deliver a maximum output current of 950 mA, with an assumption that the output current fluctuations are occurring at frequencies less than the switching frequency of the buck converter. The use of a separate circuit for load regulation [3] has been avoided. Out of the two supercapacitor modules, one is supplying positive voltage and the other supplying a negative voltage.…”

Section: Introductionmentioning

confidence: 99%

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DC–DC buck converter solely powered by supercapacitors for efficiently powering the hand‐held devices

Sengupta¹,

Mohanty²,

Bhattacharyya³

2018

IET Power Electronics

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In this study, a closed loop feed-forward direct current (DC)-DC converter has been designed which operates solely on two supercapacitor modules. This is an innovative new design where the challenge was to maintain the constant output voltage when the input voltage of the converter is decaying continuously as a function of time as long as the output load draws current. The second innovation is the selection of all the components that are required to design the regulated output DC-DC converter, even though the parameters like the supply voltages for the components have been falling continuously as a function of time since the supercapacitor modules are providing these supply voltages. The design is also robust enough to withstand certain fluctuations in the output current ranging between 200 and 950 mA and yet maintain a regulated output voltage. In this study, the authors have successfully demonstrated that one can design a DC-DC converter powered by supercapacitors to generate a constant voltage and desired output current while all the components required making that DC-DC converter remain operational although the input voltage of the supercapacitors is dropping constantly, due to the output drawing current. The operating frequency, i.e. the switching frequency ranges from 1.5 to 3.5 kHz. 2 Supercapacitor as efficient energy storage-a broad perspective A supercapacitor also known as an electric double-layer capacitor has much higher capacitance than a conventional capacitor. Supercapacitors are built to store ten to one hundred times more IET Power Electron.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

DC–DC buck converter solely powered by supercapacitors for efficiently powering the hand‐held devices

Sengupta¹,

Mohanty²,

Bhattacharyya³

2018

IET Power Electronics

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“…But this charging circuit has a major disadvantage which is low power efficiency caused by the time lag between power supply and battery voltage V BAT . On the other hand, the charging circuits in [5][6][7][8][9][10] such as switching capacitors, switching mode power supply or DC-DC converter are typified by high efficiency. However, these structures are not appropriate for integration in a single chip and also, they have low accuracy.…”

Section: Introductionmentioning

confidence: 99%

High Efficiency Buck-Boost Converter with Three Modes Selection for HV Applications using 0.18 μm Technology

et al. 2020

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In this paper, we aim to make a detailed study on the evaluation and the characteristics of the non-inverting buck–boost converter. In order to improve the behaviour of the buck-boost converter for the three operating modes, we propose an architecture based on peak current-control. Using a three modes selection circuit and a soft start circuit, this converter is able to expand the power conversion efficiency and reduce inrush current at the feedback loop. The proposed converter is designed to operate with a variable output voltage. In addition, we use LDMOS transistors with low on-resistance, which are adequate for HV applications. The obtained results show that the proposed buck-boost converter perform perfectly compared to others architecture and it is successfully implemented using 0.18 μm CMOS TSMC technology, with an output voltage regulated to 12V and input voltage range of 4-20 V. The power conversion efficiency for the three operating modes buck, boost and buck-boost are 97.6%, 96.3% and 95.5% respectively at load current of 4A.

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“…Switching power supplies are power conversion devices that provide the required voltage or current through different architectures. Although widely used in various fields, the control performances are not satisfactory under some large disturbance signals [1][2][3][4]. This is because most of them are based on proportional integral derivative (PID) control methods, while PID controllers may not overcome the adverse effect of large disturbance signals [5,6].…”

Section: Introductionmentioning

confidence: 99%

A Compound Controller Design for a Buck Converter

Sun

Zhao

et al. 2018

Energies

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In order to improve the performance of the closed-loop Buck converter control system, a compound control scheme based on nonlinear disturbance observer (DO) and nonsingular terminal sliding mode (TSM) was developed to control the Buck converter. The control design includes two steps. First of all, without considering the dynamic and steady-state performances, a baseline terminal sliding mode controller was designed based on the average model of the Buck converter, such that the desired value of output voltage could be tracked. Secondly, a nonlinear DO was designed, which yields an estimated value as the feedforward term to compensate the lumped disturbance. The compound controller was composed of the terminal sliding mode controller as the state feedback and the estimated value as the feedforward term. Simulation analysis and experimental verifications showed that compared with the traditional proportional integral derivative (PID) and terminal sliding mode state feedback control, the proposed compound control method can provide faster convergence performance and higher voltage output quality for the closed-loop system of the Buck converter.

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A DC–DC buck converter with load-regulation improvement using dual-path-feedback techniques

Cited by 5 publications

References 20 publications

DC–DC buck converter solely powered by supercapacitors for efficiently powering the hand‐held devices

DC–DC buck converter solely powered by supercapacitors for efficiently powering the hand‐held devices

High Efficiency Buck-Boost Converter with Three Modes Selection for HV Applications using 0.18 μm Technology

A Compound Controller Design for a Buck Converter

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