Abstract
In this paper, a novel control scheme is proposed to improve the current share for multiphase DC/DC converters. The proposed control scheme is based upon gain scheduling method to automatically tune the parameters such as on resistance of power MOSFET or board impedance between each phase for optimization in current balance. The purpose of this paper is proposed a digitally control method to implement the voltage mode control with current sense by inductor series resistance and combined with gain scheduling method. The proposed scheme is verified on 12V input with 1 V output, 40 A 2-phases interleaved DC/DC buck converter and the simulation and experimental results are presented to demonstrate the theoretical analysis.
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