Design and implementation of sigma-delta DPWM controller for switching converter

Pui Kei Leong, Chun Hung Yang, Chi Wai Leng, Chien Hung Tsai

Research output: Chapter in Book/Report/Conference proceedingConference contribution

14 Citations (Scopus)

Abstract

This paper describes the complete design and implementation of a low-power sigma-delta DPWM (Σ-Δ DPWM) controller for switching converter which can operate at a very high frequency. In the previous design approach, the effective resolution of Σ-Δ DPWM, i.e. the effective number of bit (ENOB) is over-estimated by using the conventional signal-to-noise ratio (SNR) with a continuous-time sine-wave input. Therefore, the modified expressions of SNR and ENOB are presented, which are suitable for the digital sigma-delta modulator (Σ-Δ MOD) with a discrete-time discrete-amplitude signal. In addition, the trade off between the hardware area consumption and the SNR value is discussed. Finally, the system simulation results of the general 10-b DPWM controller and 10-b effective resolution ΣΔ DPWM controller for buck converter are shown to verify the proposed design approach

Original languageEnglish
Title of host publication2009 IEEE International Symposium on Circuits and Systems, ISCAS 2009
Pages3074-3077
Number of pages4
DOIs
Publication statusPublished - 2009 Oct 26
Event2009 IEEE International Symposium on Circuits and Systems, ISCAS 2009 - Taipei, Taiwan
Duration: 2009 May 242009 May 27

Publication series

NameProceedings - IEEE International Symposium on Circuits and Systems
ISSN (Print)0271-4310

Other

Other2009 IEEE International Symposium on Circuits and Systems, ISCAS 2009
CountryTaiwan
CityTaipei
Period09-05-2409-05-27

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

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  • Cite this

    Leong, P. K., Yang, C. H., Leng, C. W., & Tsai, C. H. (2009). Design and implementation of sigma-delta DPWM controller for switching converter. In 2009 IEEE International Symposium on Circuits and Systems, ISCAS 2009 (pp. 3074-3077). [5118452] (Proceedings - IEEE International Symposium on Circuits and Systems). https://doi.org/10.1109/ISCAS.2009.5118452