A High-Efficiency Fast Transient COT Control DC–DC Buck Converter With Current Reused Current Sensor

Ain, Qurat ul; Khan, Danial; Jang, Byeong Gi; Basim, Muhammad; Shehzad, Khuram; Asif, Muhammad; Verma, Deeksha; Ali, İmran; Pu, Young Gun; Hwang, Keum Cheol; Yang, Youngoo; Lee, Kang-Yoon

doi:10.1109/tpel.2021.3052198

Cited by 21 publications

(9 citation statements)

References 18 publications

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“…However, the circuits are more complicated than this work. (G) From Table 3, this work has a better transient response than [19,[24][25][26][27], probably because this work is the simulation result. (H) Compared with [19], this work provides a simple scheme to keep the switching frequency constant.…”

Section: Discussionmentioning

confidence: 94%

“…In contrast to the current contactless sensor, sensor-less solutions are more popular and are proposed in [16][17][18][19][20][21][22][23][24][25][26][27]. In Figure 2, the sensing method is straightforward [16,17].…”

Section: Current Sensor Investigationmentioning

confidence: 99%

“…Therefore, the sensing method is similar to [18]. A high-efficiency fast transient constant on-time (COT) control DC-DC buck converter with current reused current sensor is proposed in [27]. The current reused current sensor enhances the loop stability and improves the power conversion efficiency at light load.…”

Section: Current Sensor Investigationmentioning

confidence: 99%

“…The contribution and expected outcomes of the designed converter can be listed as (a) simple architecture: it is accessible to implementation, (b) suitable for mass production, (c) high design flexibility: the converter provides more flexible design parameters for various application, (d) the constant switching frequency feature dramatically reduces the difficulty in solving the EMI issue, and (e) good transient response. A high-efficiency fast transient constant on-time (COT) control DC-DC buck converter with current reused current sensor is proposed in [27]. The current reused current sensor enhances the loop stability and improves the power conversion efficiency at light load.…”

Section: Current Sensor Investigationmentioning

confidence: 99%

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Design of the Buck Converter without Inductor Current Sensor

Chou

2022

Electronics

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This paper proposes a novel control scheme for the buck converter without an inductor current sensor. The architecture of the proposed buck converter is simple and suitable for integration and mass production. It employs an output-voltage-measurement method to determine the switch ON time; therefore, the current sensor is not required. The design specification targets the application with a standard battery power source to generate the low voltages for low-power MCU or ASIC. The load current range aims for several hundred milliamps. The proposed control scheme is analyzed and simulated by SIMPLIS. The control scheme, theoretical analysis, circuit realization, contributions, advantages, and simulation results are presented in this paper. Furthermore, the circuit can be fabricated by a 0.35 μm CMOS process.

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Section: Discussionmentioning

confidence: 94%

Section: Current Sensor Investigationmentioning

confidence: 99%

Section: Current Sensor Investigationmentioning

confidence: 99%

Section: Current Sensor Investigationmentioning

confidence: 99%

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Design of the Buck Converter without Inductor Current Sensor

Chou

2022

Electronics

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“…The circuit control strategy is one of the focuses of current researches, which can be divided into the variable amplitude control and the variable frequency control (Lin et al, 2022;Ripamonti et al, 2019;Liu et al, 2022b;ul Ain et al, 2021). The variable amplitude control is to complete the control target by changing the amplitude of the controlled variable.…”

mentioning

confidence: 99%

Current stress optimization control strategy of the buck topology with the variable frequency/amplitude mode

Li²,

Cao³

et al. 2023

Front. Energy Res.

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The Buck circuit is a common topology in DC-DC converter. The existing control strategies have the advantages of short modulation time and high dynamic performance, but they also have the disadvantages of poor active modulation of the working mode of the converter and large current stress. In response to the above problems, an improved frequency/amplitude modulation control strategy is proposed in this paper. The relationship between the output power and the peak inductor current in three modes, namely, Discontinuous Conduction Mode Critical Conduction Mode (CRM) and Continuous Conduction Mode is derived. The precise control strategy of the inductor peak current is introduced based on the traditional voltage loop control strategy to realize the free control of the system working mode and reduce the current stress during the working process. Finally, the experimental platforms of 100V/12V and 220/80V are established respectively. The experimental results show that the flexible switching circuit operating mode in the full load range can be realized under the new control method. In the 100/12V experimental platform, the current stress of the switch tube is optimized by at least 10.7%, and the average system efficiency is improved by 2.21%, with the same main circuit parameters.

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