Design of a step-down DC-DC controller integrated circuit with adaptive dead-time control

Author(s)
Li, Zhipeng, Ph. D. Massachusetts Institute of Technology
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Alternative title
Design of a step-down direct current to direct current controller integrated circuit with adaptive dead-time control
Other Contributors
Massachusetts Institute of Technology. Dept. of Electrical Engineering and Computer Science.
Advisor
David Perreault.
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Abstract
A constant-frequency peak current mode synchronous step-down DC-DC controller integrated circuit has been designed with adaptive dead-time control. The adaptive dead-time control circuitry is implemented as digital delay-locked loop with digital counters as memory elements. In periodic steady state, the switch is controlled to turn on exactly when the body diode starts to conduct current. The conduction loss through MOSFET switch body diode is minimized. In spice simulation, this scheme increases the overall efficiency in low-voltage applications by up to 3%.
Description
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2010.
 
Cataloged from PDF version of thesis.
 
Includes bibliographical references (p. 75-77).
 
Date issued
2010
URI
http://hdl.handle.net/1721.1/61170
Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
Publisher
Massachusetts Institute of Technology
Keywords
Electrical Engineering and Computer Science.
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