New high-efficiency 2.5 V/0.45 W RWDM Class-D audio amplifier for portable consumer electronics

被引：36
|
作者：
Li, SC [1 ]
Lin, VCC
Nandhasri, K
Ngarmnil, J
机构：
[1] Natl Yunlin Univ Sci & Technol, Adv Technol & Integrated Syst Lab, Touliu, Yunlin, Taiwan
[2] Natl Univ Tainan, Inst Commun Engn, Tainan, Taiwan
[3] Etrend Elect Inc, Analog Ctr, Tainan 741, Taiwan
[4] Mahanakorn Univ Technol, Dept Elect Engn, Bangkok 10530, Thailand
来源：
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS | 2005年 / 52卷 / 09期
关键词：
analog integrated circuits; audio amplifier; Class D; floating gate; power efficiency; rectangular wave delta modulator (RWDM);
D O I：
10.1109/TCSI.2005.852500
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A single-chip of Class-D audio amplifier with high-power efficiency is presented. It includes a rectangular wave delta modulator (RWDM) and bridge-tied load output gate-drivers. The RWDM has a multiple inputs floating-gate hysteresis comparator and a feedback integrator formed by the external L-R low-pass filter. This monolithic Class-D audio amplifier with a maximum power efficiency of 92% has a flat frequency response with +/- 0.3 dB up to 20 kHz, and is capable of delivering up to 0.45 W of continuous average power into an 8-Omega load at less than 0.5% total harmonic distortion plus noise from a 2.5-V power supply in the high fidelity range (20 Hz-20 kHz).
引用
收藏
页码：1767 / 1774
页数：8
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