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The design and implementation of a digital controller for a boost power factor correction (PFC) converter under continuous current mode is presented to reduce the harmonic distortion. Based on the circuit structure of boost PFC converter, the total digital control loop is simply implemented to improve the power factor of converter and reduce the calculation burden of digital controller. Meanwhile, the optimized digital pulse width modulator (DPWM) is adopted to improve the regulation performance of digital controller. The boost PFC converter with the proposed digital controller has been implemented via the FPGA platform, and experimental results indicate that the digital PFC converter with the proposed digital controller can aim high regulation linearity, power factor and output stability.

Design and implementation of the optimized digital controller with the simplified control algorithm for boost power factor correction converter