Title :
A high-performance current sensing circuit with full-phase sampling capability
Author :
Ze-kun Zhou ; Haiwu Xie ; Yue Shi ; Chuankui Wu ; Jiangang Huang ; Xin Ming ; Bo Zhang
Author_Institution :
State key Lab. of Electron. Thin Films & Integrated Devices, Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Abstract :
A high-performance current sensing circuit with full-phase sampling capability is presented in this paper, which is suitable for DC-DC converters, motor driver circuits, and other control systems requiring current sensing. The proposed structure comprises of three parts, which are level shift, phase identification, and signal rectification. No matter what the phase of the current is, the current sensing circuit in this paper can accurately obtain the current information. Based on a standard 0.35um BCD process, the proposed current sensing circuit has been validated at different temperature points and process corners. The results demonstrate that the circuit can sense full-phase currents within ±1.5% accuracy.
Keywords :
DC-DC power convertors; current-mode circuits; driver circuits; electric current measurement; rectifying circuits; BCD process; DC-DC converters; control systems; full-phase sampling capability; high-performance current sensing circuit; level shift; motor driver circuits; phase identification; signal rectification; size 0.35 mum; Digital audio players; Integrated circuit modeling; Rectifiers; Resistors; Switched-mode power supply; Temperature sensors;
Conference_Titel :
ASIC (ASICON), 2013 IEEE 10th International Conference on
Conference_Location :
Shenzhen
Print_ISBN :
978-1-4673-6415-7
DOI :
10.1109/ASICON.2013.6812050
