Fully Integrated High Accuracy Continuous Current Sensor For Switching Voltage Circuits

被引：0

作者：

Hussein, Ahmed I. ^{[1
]}

Mohieldin, Ahmed N. ^{[1
]}

Hussien, Faisal ^{[1
]}

Eladawy, Ahmed ^{[1
]}

机构：

[1] Cairo Univ, Dept Elect & Elect Commun, Giza 12613, Egypt

来源：

2014 IEEE 23RD INTERNATIONAL SYMPOSIUM ON INDUSTRIAL ELECTRONICS (ISIE) | 2014年

关键词：

Current Sensor; DC-DC Converter; Class-D Audio Amplifier; BIASED SHUNT FEEDBACK; CHIP CURRENT SENSOR; BUCK CONVERTERS;

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：

This paper presents the design of a novel integrated continuous current sensor (CCS) circuit for class-D audio amplifier and current mode controlled DC-DC converter. The proposed current sensor has the capability of sensing either positive or negative current of off-chip inductor continuously. Additionally, fast transient response with low quiescent current has been achieved. Furthermore, a calibration technique has been developed and attached to current sensor circuit to eliminate performance deterioration due to process, supply, and temperature (PVT) variation. The proposed CCS has been implemented using TSMC 65 nm technology. Simulation results show that the proposed CCS is able to operate with switching frequency up to 1MHz at only 75 mu A quiescent current. The overall accuracy of proposed CCS is greater than 95% over all process corners and temperature variation from -40 degrees C to 125 degrees C, and supply variation from 2.5 V to 2.9 V.

引用

页码：497 / 502

页数：6

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