[KSCI] Korea Science Citation Index Service

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

Kim Chong-Eun (Dept. of Electrical Engineering, KAIST)
Han Sang-Kyoo (School of Electrical Engineering, Kookmin University)
Moon Gun-Woo (Dept. of Electrical Engineering, KAIST)

Publication Information

Journal of Power Electronics / v.6, no.1, 2006 , pp. 83-93 More about this Journal

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.

Keywords

digital car audio amplifier; DC/DC converter; zero-voltage-switching; zero-current-switching;

Citations & Related Records

Reference

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