High step-up, high power density boost converter integrated with switched capacitor-diode cell

A large dc conversion ratio non-isolated hybrid converter is obtained by integrating a capacitor-diode cell into a boost circuit. A larger conversion ratio comparing with the conventional boost converter is obtained. And the cost for this larger dc gain is just one additional cell formed by a diode and a capacitor. The new structure presents a minimum of components, positioned in such a way as to decrease the size of the capacitors. A high power density is obtained due to the use of smaller size capacitors. The single active switch is placed with the source referenced to the ground, rendering simplicity in its driving. The theory, simulation and experimental results showed a reduced voltage stress on the switches and a high efficiency.