Improving the control strategy for a four-switch buck-boost converter
Name
227038308-MIT.pdf
Description
Full printable version
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6.99 MB
Format
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Checksum (MD5)
27809a02b2c48ce04ce76f19897e4511
Author(s)
Whitaker, Michael Peter
Advisor(s)
Mark Vitunic and David J. Perreault.
Date Issued
2007
Publisher
Massachusetts Institute of Technology
Abstract
The four-switch buck-boost converter, such as implemented with the Linear Technology LTC3440 integrated circuit, is useful in many applications. While this topology can be highly efficient, new strategies for controlling it could decrease power losses even more. The strategy proposed for this thesis involves the use of level shifted triangle waves and high speed comparators to achieve a narrower buck-boost region than achieved in previous control IC's such as the LTC3440. Reducing the amount of operation in this regime is desirable because it is the most inefficient mode of operation of the converter. This potentially simpler solution will allow for resources to be used to improve the performance of other elements of the circuit, allowing for potential increases in efficiency.
Description
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2007.
Includes bibliographical references (p. 125-126).
Subjects
Electrical Engineering and Computer Science.
MIT Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
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