A On-Chip Current Sensing Circuit for Boost Converter
Conference: ISCTT 2021 - 6th International Conference on Information Science, Computer Technology and Transportation
11/26/2021 - 11/28/2021 at Xishuangbanna, China
Proceedings: ISCTT 2021
Pages: 5Language: englishTyp: PDF
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Authors:
Yang, Feng (Science and Technology on Analog Integrated Circuit Laboratory, Sichuan Institute of Solid-State Circuits, Chongqing, China)
Abstract:
A new on-chip current sensing circuit for DC-DC boost converter is present in this paper. The proposed scheme is base on SENSEFET technique, compensating the bias current to acquire high accuracy and using an improved common-gate amplifier to get high speed; the circuit can save chip area and reduce power consumption as eliminating the need for operational amplifiers. The performance of the circuit is simulated with Cadence Spectre in a 0.35 µm 40V BCD process, and the accuracy is above 96.7% for the load current from 200mA to 1.5A, it is suitable for high power boost DC-DC converter.