A New High Efficiency and Low Profile On-Board DC/DC Converter for Digital Car Audio Amplifiers

Chong-Eun Kim; Sang-Kyoo Han; Gun-Woo Moon

A New High Efficiency and Low Profile On-Board DC/DC Converter for Digital Car Audio Amplifiers

Chong-Eun Kim

Sang-Kyoo Han

Gun-Woo Moon

Vol. 6, No. 1, pp. 83-93, Jan. 2006

10.6113/JPE.2006.6.1.83

Digital car audio amplifier

DC/DC converter

Zero-voltage-switching

zero-current-switching

PDF

Abstract

A new high efficiency and low profile on-board DC/DC converter for digital car audio amplifiers is proposed. The proposed converter shows low conduction loss due to the low voltage stress of the secondary diodes, a lack of DC magnetizing current for the transformer, and a lack of stored energy in the transformer. Moreover, since the primary MOSFETs are turned-on under zero-voltage-switching (ZVS) conditions and the secondary diodes are turned-off under zero-current-switching (ZCS) conditions, the proposed converter has minimized switching losses. In addition, the input filter can be minimized due to a continuous input current, and an output inductor is absent in the proposed converter. Therefore, the proposed converter has the desired features, high efficiency and low profile, for a viable power supply for digital car audio amplifiers. A 60W industrial sample of the proposed converter has been implemented for digital car audio amplifiers with a measured efficiency of 88.3% at nominal input voltage.

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Cite this article

[IEEE Style]

C. Kim, S. Han, G. Moon, "A New High Efficiency and Low Profile On-Board DC/DC Converter for Digital Car Audio Amplifiers," Journal of Power Electronics, vol. 6, no. 1, pp. 83-93, 2006. DOI: 10.6113/JPE.2006.6.1.83.

[ACM Style]

Chong-Eun Kim, Sang-Kyoo Han, and Gun-Woo Moon. 2006. A New High Efficiency and Low Profile On-Board DC/DC Converter for Digital Car Audio Amplifiers. Journal of Power Electronics, 6, 1, (2006), 83-93. DOI: 10.6113/JPE.2006.6.1.83.