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HAIT Journal of Science and Engineering B Volume 2, Issues 3-4, pp. 283-304 © 2005 Holon Academic Institute of Technology | ||||
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1.8-MHz, 48-V resonant VRM
Laszlo Huber1,*, Kevin Hsu2, and Milan M. Jovanović1
1Delta Products Corporation, Power Electronics Laboratory | 5101 Davis Drive, Research Triangle Park, NC 27709, USA 2Delta Electronics, Inc., DC/DC Engineering BU 3 Tung Yuan Road, Chung Li Industrial Zone, Taoyuan Shieh, Taiwan, R.O.C. *Corresponding author: lhuber@deltartp.com Received 1 March 2005, accepted 30 June 2005
| Recently, a new high-frequency resonant-converter technology with phase-shifted regulation has been introduced. Higher switching frequencies enable controls with higher bandwidth feedback, which in turn require less output capacitance. As a result, only surface mount ceramic capacitors can be used at the output, which are less expensive and potentially more reliable than the commonly used electrolytic and tantalum capacitors. The new technology is employed in the development of a 1.8-MHz, 48-V, 130-W (0.95-1.7 V, 100 A) resonant VRM. Fundamentals of the new technology are reviewed. Implementation details and experimental results are given
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