Dual output three-level boost power factor correction converter with unbalanced loads

In this paper, a control strategy for three-level boost power factor correction converter with fully regulated two outputs is proposed. Beyond two outputs which are completely regulated, a switching logic law is established to minimize the input current ripple. Besides the features of the three-level boost power converter already known, the proposed approach has the advantage of regulating two output voltages for unbalanced loads, guaranteeing voltage sharing across the semiconductor device independent of the load, based on a Lyapunov-like technique. The robustness of the feedback control system is investigated, and experimental results are reported.