Research on Parallel Interleaving Control of DC_DC+Boost+PFC Module Based on DSP

Probe domestic double-head probe 038-BB-5.7L The shape of the two ends of the needle is outside the pointed needle

This paper presents a simple PFC module parallel interleaved digital control scheme. Taking three modules in parallel as an example, using the average current control strategy, the parallel control of the DC-DC Boost-PFC module is realized with only one controller. The switching frequency is 120 kHz, and good current sharing performance is achieved, and the power switch tube is reduced. At the same time, their high-frequency switching phase is evenly increased by 1200, which realizes the interleaving of the inductor current, reduces the high-frequency ripple of the input current, and reduces the differential mode inductance of the input EMI filter. The experimental results prove the feasibility of the control scheme and provide a good solution for the digital control of the parallel power factor correction module.

Parallel block diagram of digitally controlled Boost PFC module

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