Fixed-switching frequency interleaved sliding mode eight-phase synchronous buck converter
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Rights accessOpen Access
This paper describes the design of an interleaved sliding mode control for a multiphase synchronous buck converter, which inherits the properties of sliding mode control, operates with fixed switching frequency in the steady-state, and ensures current equalization among phases. Moreover, a power management algorithm is added in order to decide the number of active phases as function of the power load demand, thus optimizing the converter efficiency. The system uses a Master-Slave structure where each phase can actuate as the Master one in such a way that the overall system reliability is improved. Experimental results in a 1.5 kW eight-phase synchronous buck converter show that interleaving operation, robust output voltage regulation, phase current equalization, switching frequency regulation, and power management are achieved.
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CitationRepecho, V.; Biel, D.; Ramos, R. Fixed-switching frequency interleaved sliding mode eight-phase synchronous buck converter. "IEEE transactions on power electronics", 1 Gener 2018, vol. 33, núm. 1, p. 676-688.