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Control Techniques of Class D Audio Power Amplifier

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Abstract:

Although class D amplifier has the merits of high efficiency, a little heat and small Bulk, its distortion is larger than linear counterparts due to switching behaviour of power transistors. Its principle and several new pivotal control technologies were presented in this paper. In this way, efficiency of 90% can be achieved and the degree of the distortion can be less than 0.4%.

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Periodical:

Applied Mechanics and Materials (Volumes 631-632)

Pages:

422-426

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.631-632.422

Citation:

Cite this paper

Online since:

September 2014

Authors:

Yan Lei Zhang*, Gao Feng Zhu, Tie Bin Wu

Keywords:

Dynamic Compensation, Feedback Control, One Cycle Control, Pulse Width Modulation

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Сopyright:

© 2014 Trans Tech Publications Ltd. All Rights Reserved

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References

[1] CHANGJ S, GWEE B H, LON Y S. Proc. –IEEE International Symposium On Circuits And System, 2001, 1: I-635-I-638.

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[2] SMITH KM. IEEE Transaction On PowerElectronics, 2000, 15(1) : 164 - 173.

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[3] STREIENBERGER M, BRESCH H , MATHIS W. IEEE International Symposium On Circuits and Systems, 2000, I-511-I-514.

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[4] SMITH KM. IEEE Transaction On Power Electronics, 1999, 14(1): 142 -150.

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