Voltage Doubler Rectified Boost-Integrated Half Bridge (VDRBHB) Converter for Digital Car Audio Amplifiers

• Published in: IEEE transactions on power electronics Vol. 22; no. 6; pp. 2321 - 2330
• Main Authors: KIM, Chong-Eun, MOON, Gun-Woo, HAN, Sang-Kyoo
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.11.2007; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Amplifiers; Applied sciences; Boost converter; Bridge circuits; Converters; Convertors; dc-dc converter; Digital; digital car audio amplifiers; Diodes; Efficiency; Electric currents; Electric potential; Electric power; Electrical engineering. Electrical power engineering; Electrical machines; Electronics; Exact sciences and technology; Filters; half bridge (HB) converter; Low voltage; Magnetic separation; MOSFETs; Receivers & amplifiers; Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices; Sound filters; Stress; Switching; Switching converters; Transformers; Transformers and inductors; Transistors; voltage doubler rectifier (VDR); Voltage doublers; Zero current switching; zero current switching (ZCS); Zero voltage switching; zero voltage switching (ZVS); dc-dc converter; zero current switching (ZCS); digital car audio amplifiers; zero voltage switching (ZVS); Boost converter; half bridge (HB) converter; voltage doubler rectifier (VDR); MOSFET; Motor car; Diode; Electric stress; Zero voltage switching; Power supply; Inductor; Zero current switching; Digital signal; Low voltage; Switching conditions; Direct current; Electric loss; Inward current; Bridge convertor; MOS technology; Road vehicle; Power electronics; Output signal; Current transformer; Acoustic wave amplifier; High efficiency; Voltage multipliers
• ISSN: 0885-8993; 1941-0107
• DOI: 10.1109/TPEL.2007.904222

A new voltage doubler rectified boost-integrated half bridge converter for digital car audio amplifiers is proposed. The proposed converter shows low conduction loss due to low voltage stress of the secondary diodes, no 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 conditions and the secondary diodes are turned-off under zero current switching 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 filter does not need an inductor in the proposed converter. Therefore, the proposed converter has the desired features, high efficiency and low profile, for a viable power supplies for digital car audio amplifiers. A 60-W 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.