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Energies 2017, 10(8), 1128; doi:10.3390/en10081128

A New Combined Boost Converter with Improved Voltage Gain as a Battery-Powered Front-End Interface for Automotive Audio Amplifiers

Department of Vehicle Engineering, National Taipei University of Technology, 1, Sec. 3, Chung-Hsiao E. Road, Taipei 106, Taiwan
Department of Information and Communication Engineering, Chaoyang University of Technology, Taichung 41349, Taiwan
School of Electrical and Electronic Engineering, Universiti Sains Malaysia, USM Engineering Campus, Nibong Tebal, Seberang Perai Selatan 14300, Penang, Malaysia
Department of Electrical Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt Rd., Taipei 106, Taiwan
Author to whom correspondence should be addressed.
Received: 18 April 2017 / Revised: 4 June 2017 / Accepted: 28 July 2017 / Published: 1 August 2017


High boost DC/DC voltage conversion is always indispensable in a power electronic interface of certain battery-powered electrical equipment. However, a conventional boost converter works for a wide duty cycle for such high voltage gain, which increases power consumption and has low reliability problems. In order to solve this issue, a new battery-powered combined boost converter with an interleaved structure consisting of two phases used in automotive audio amplifier is presented. The first phase uses a conventional boost converter; the second phase employs the inverted type. With this architecture, a higher boost voltage gain is able to be achieved. A derivation of the operating principles of the converter, analyses of its topology, as well as a closed-loop control designs are performed in this study. Furthermore, simulations and experiments are also performed using input voltage of 12 V for a 120 W circuit. A reasonable duty cycle is selected to reach output voltage of 60 V, which corresponds to static voltage gain of five. The converter achieves a maximum measured conversion efficiency of 98.7% and the full load efficiency of 89.1%. View Full-Text
Keywords: automotive audio amplifier; battery-powered; combined boost converter; voltage gain automotive audio amplifier; battery-powered; combined boost converter; voltage gain

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Lai, C.-M.; Cheng, Y.-H.; Teh, J.; Lin, Y.-C. A New Combined Boost Converter with Improved Voltage Gain as a Battery-Powered Front-End Interface for Automotive Audio Amplifiers. Energies 2017, 10, 1128.

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