A Novel Over-Current Protection for Digital Power Amplifier

被引：0
|
作者：
Xu, Yong [1 ]
Zhao, Fei [2 ]
Min, Rui [1 ]
Sun, Zhen [1 ]
Huang, Ying [1 ]
机构：
[1] PLA Univ Sci & Technol, Inst Commun Engn, Nanjing 211101, Jiangsu, Peoples R China
[2] PLA Univ Sci & Technol, Inst Command Automat, Nanjing 210007, Jiangsu, Peoples R China
来源：
2012 IEEE 11TH INTERNATIONAL CONFERENCE ON SOLID-STATE AND INTEGRATED CIRCUIT TECHNOLOGY (ICSICT-2012) | 2012年
关键词：
D O I：
暂无
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：
The paper presents a novel over current protection circuit in digital power amplifier. The over current protection circuit would be used to shut down the output buffer when two output pins short-circuit to power supply, short-circuit to ground or short-circuit to each other. Chip achieves a maxim power of 2.75W and maxim efficiency of 92% at a 4Ohm load when power supply voltage is 5V. Chip operates in a wide supply voltage area from 3V to 5.5V. It is fabricated in 0.35um, double poly, triple metal CMOS process. It achieves a THD as low as 0.1%, with a flat band response between 20 Hz and 20 KHz. The over-current threshold is about 3A.
引用
收藏
页码：1342 / 1344
页数：3
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