Abstract
Parallel connection of MOSFET devices is an available solution for low-voltage and high-current field. But the current sharing among paralleled power MOSFETs is hardly realized, on account of the parameter variations of MOSFETs, the uneven scattered parameters of layouts or packages, the different parameters of gate drive and so on. The paper analyzes the characteristic parameters of MOSFET and effects of circuit parameters on the static and dynamic drain current. In this paper, the current balance of each parallel branch is realized by adopting the current-sharing method of coupling inductor that coupling coils of common magnetic core are connected in each branch of parallel connection, according to Faraday’s law of electromagnetic induction and the principle of flux constraint. Then, the circuit and mathematical models of coupling inductors were presented to reveal its mechanism to eliminate the unbalance current actively. Finally, the effectiveness and feasibility of the current-sharing method for parallel power MOSFET with series-coupled inductors are verified by simulation.
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Liu, T., Cui, Yb., Xue, L., Zeng, Fq. (2020). Design and Simulation of Active Current Sharing of Paralleled Power MOSFETs. In: Patnaik, S., Wang, J., Yu, Z., Dey, N. (eds) Recent Developments in Mechatronics and Intelligent Robotics. ICMIR 2019. Advances in Intelligent Systems and Computing, vol 1060. Springer, Singapore. https://doi.org/10.1007/978-981-15-0238-5_80
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DOI: https://doi.org/10.1007/978-981-15-0238-5_80
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