Control techniques for power factor correction converters

The aspects regarding control strategies for Power Factor Correction (PFC) converters are investigated. The major control techniques to absorb sinusoidal input currents in boost PFC's are reviewed and analyzed. Their extension to other converter topologies is discussed and some experimental results for a PFC based on the Sepic topology are reported, which allow comparison of converter performance with different control techniques. Lastly, some considerations regarding dynamic operation are given, together with information about control IC's specifically developed for PFC applications.

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