Controller for charge-pump based interleaved boost converter

This paper presents design and analysis of a charge-pump based high-gain boost converter. The converter exhibits higher voltage gain, almost double, in comparison to the well-established conventional boost converter. Additionally, to reduce the source current ripple an interleaved gating scheme is employed for the active switches. A steady-state analysis is made, and then design expressions for converter elementsare established. Small-signal transfer functions are formulated to design a suitable controller. Through small-signal analysis it has been shown that a simple single-loop controller is able to perform the voltage regulation together with the load division among the parallel boost cells. To confirm the theoretical developments a 24 to 100 V, 50 W prototype is fabricated. Simulation and experimental results are presented to validate the proposed design, voltage regulation and the load division in the parallel interleaved boost-cells without using any current-mode controller.