A nonlinear control for switched-capacitor converter based on one-cycle control technique

Abstract

The nonlinear one-cycle control(OCC) method is adapted to switched-capacitor converter in this paper. To illustrate, the circuit model of dual-phase unity gain switched-capacitor converter is explored, which is organically combined with the OCC control technique. Consequently, a new control loop is formulated and implemented with a simple analog circuit. The model derivation and control loop analysis are all investigated. Experiments results demonstrate that, in wide operation range, the rejection to external disturbance can be completed through one switching cycle. The OCC control can be used for general step-up and step-down dual-phase switched-capacitor converters.