LUO Ya-jing, GUO Jian-zhong*
(College of Physics and Information Technology, Shaanxi Normal University, Xi′an 710062, Shaanxi, China)
Abstract:
Based on the current sensing circuit structure and principles, the paper has analyzed the factors which influence the accuracy of current sensing. Aiming at high-side current sensing circuit, the relationships between the supply voltage, matched resistance, and the value of current sensing were also discussed. The high-side current sensing circuit is modified by software and hardware, and the experimental results show that the error of current sensing reduced to less than 4% and the accuracy of current sensing is significantly enhanced.
KeyWords:
high-side current sensing; low-side current sensing; accurately current sensing
