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A High Frequency Voltage-Controlled PWM/PSM Dual-Mode Buck DC-DC Converter

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Book cover Intelligent Data Analysis and Applications (ECC 2016)

Part of the book series: Advances in Intelligent Systems and Computing ((AISC,volume 535))

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Abstract

A high frequency voltage-controlled PWM/PSM dual-mode Buck DC-DC converter is presented in this paper. In order to achieve high efficiency over its entire load range, pulse-width modulation (PWM) and pulse-skip modulation (PSM) were integrated in the proposed Buck converter. By adopting a novel load current sensing circuit, the converter’s operation mode can be automatically changed between PWM and PSM mode according to load current. Different from the traditional inductor current sensing circuit, the proposed load current sensing circuit is realized by detecting the gate driver signal of synchronous power NMOS which changes with the load current simultaneously. The proposed Buck converter has been designed and simulated in SMIC 0.18 μm CMOS process. Simulation results show that the peak conversion efficiency of the Buck converter is about 85 %. It is able to regulate the output voltage at 1.2 V from a 1.6 ~ 3 V supply voltage for the maximum output current of 500 mA with 20 MHz switching frequency.

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Acknowledgments

This paper is supported by “National Natural Science Foundation of China” (No. 61401137) & “Startup Fund for Scholars of Fujian University of Technology” (No. GY-Z11002).

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Authors and Affiliations

  1. Fujian University of Technology, Fuzhou, 350118, China

    Zhong Lun-Gui

  2. School of Electronic Science and Applied Physics, Hefei University of Technology, Hefei, 230009, China

    Cheng Xin

Authors
  1. Zhong Lun-Gui
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  2. Cheng Xin
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Corresponding author

Correspondence to Zhong Lun-Gui .

Editor information

Editors and Affiliations

  1. College of Information Science and Engineering, Fujian University of Technology , Fuzhou, Fujian, China

    Jeng-Shyang Pan

  2. Faculty of Electrical Engineering and Computer Science, VŠB-Technical University of Ostrava , Ostrava-Poruba, Moravskoslezsky, Czech Republic

    Václav Snášel

  3. College of Information Science and Engineering, Fujian University of Technology, Fuzhou, China

    Tien-Wen Sung

  4. College of Information Science and Engineering, Fujian University of Technology, Fuzhou, China

    Xiao Dong Wang

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Lun-Gui, Z., Xin, C. (2017). A High Frequency Voltage-Controlled PWM/PSM Dual-Mode Buck DC-DC Converter. In: Pan, JS., Snášel, V., Sung, TW., Wang, X. (eds) Intelligent Data Analysis and Applications. ECC 2016. Advances in Intelligent Systems and Computing, vol 535. Springer, Cham. https://doi.org/10.1007/978-3-319-48499-0_32

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  • DOI: https://doi.org/10.1007/978-3-319-48499-0_32

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-319-48498-3

  • Online ISBN: 978-3-319-48499-0

  • eBook Packages: EngineeringEngineering (R0)

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