Integrated class-D amplifier with active current sensing suitable for alternating current switches

被引：12

作者：

Chen, Jiann-Jong ^{[1
]}

Lin, Ho-Cheng ^{[1
]}

Kung, Che-Min ^{[1
]}

Hwang, Yuh-Shyan ^{[1
]}

Su, Juing-Huei ^{[2
]}

机构：

[1] Natl Taipei Univ Technol, Dept Elect Engn, Taipei 106, Taiwan

[2] Lunghwa Univ Sci & Technol, Dept Elect Engn, Tao Yuan 333, Taiwan

来源：

IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS | 2008年 / 55卷 / 08期

关键词：

active current-sensing circuit; class-D amplifier;

D O I：

10.1109/TIE.2008.921249

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 [计算机科学与技术];

摘要：

An integrated class-D amplifier with active current sensing suitable for ac switches is presented in this paper. The proposed current-sensing technique is used to sense and control the inductor current at the output stage and allows the current-sensing element to be integrated into class-D amplifiers. To verify the performance of the proposed circuits, a class-D amplifier was designed and fabricated with 3.3-V 0.35-mu m double-polyquadruple-metal CMOS technology on a chip area of 1.79 x 1.45 mm. The maximum power efficiency of the class-D amplifier can be up to 94% for an 8-Omega load. These active current-sensing circuits can be applied to other power converters with ac switches.

引用

页码：3141 / 3149

页数：9

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