Design and Implementation of Sigma-Delta DPWM Controller for Switching Converter

被引：0

作者：

Leong, Pui-Kei ^{[1
]}

Yang, Chun-Hung ^{[1
]}

Leng, Chi-Wai ^{[1
]}

Tsai, Chien-Hung ^{[1
]}

机构：

[1] Natl Cheng Kung Univ, Dept Elect Engn, Tainan 70101, Taiwan

来源：

ISCAS: 2009 IEEE INTERNATIONAL SYMPOSIUM ON CIRCUITS AND SYSTEMS, VOLS 1-5 | 2009年

关键词：

D O I：

暂无

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

This paper describes the complete design and implementation of a low-power sigma-delta DPWM (Sigma-Delta DPWM) controller for switching converter which can operate at a very high frequency. In the previous design approach, the effective resolution of Sigma-Delta 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 (Sigma-Delta 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 Sigma Delta DPWM controller for buck converter are shown to verify the proposed design approach

引用

页码：3074 / 3077

页数：4

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