Integrated Low-Voltage Filter-less Class-D Audio Power Amplifier with PWM DC/DC Buck Converter

摘要：

Consumers desire that new generation of devices will be developed with smaller physical size and lower cost than existing devices. This paper presents the design of an integrated class D audio power amplifier with step-down (Buck) DC to DC converter. The high efficiency pulse-width modulation (PWM) buck converter is used to supply 1.5 V for the class D amplifier. The operating voltage range can be from 3V to 5V which is used for mobile devices. The class D amplifier uses the three level pulse width modulation (PWM) to eliminate the external output low-pass filter. The circuit is designed with TSMC 0.35um 2P4M 3.3V/5V mixed-signal CMOS process. The best total power efficiency of this integrated circuit achieves 84％, and the total harmonic distortion (THD) is less than 0.26％ at 10 KHz with 8Ω load.

作者: Wan-Rone Liou Chun-Nan Pan Jia-Hsin Lin

作者单位: National Taipei University, 151 University Road, Sanxia, Taipei, 23741, Taiwan China

会议类型: 国际会议

会议名称: 2010 International Conference on Communications,Circuits and Systems(2010年通信、电路与系统国际会议)

会议地点: 成都

会议语种:英文

页码: 546-550

在线出版日期: 2010-06-28（万方平台首次上网日期，不代表论文的发表时间）