Research On Switched Capacitor Converter

Capacitor converter is a kind of typical inductorless converter,it is the switch and capacitor in the circuit that achieve the voltage conversion and energy transfer,for the absence of the magnetic components,the size and weight of the converter will reduce,and easy to integration. With the miniaturization of electronic equipment, switched capacitor DC-DC converter will have broad application prospects.According to the present situation of studying on switched capacitor DC-DC converter,in the paper,firstly systematically explain the principle of switched capacitor DC-DC converters and new trends in recent years in this area,and choose the resonant switched capacitor DC-DC converter as my main objective for its novelty and the bright prospect.During the periodical charging and discharging operation in the capacitors, current stress is usually very high for conventional switched capacitor converter,and its efficiency is much decreased as the output current is increased.As a result,conventional switched capacitor have been limited to be used with a very small output current.To solve this problem,a resonant switched capacitor converter topology is presented in this paper,the theoretical analysis and design method are described in detail,High efficiency and high power are confirmed by experimental results.In part 5,focus on the parasitical parametric analysis of a double-mode conventional and resonant switched capacitor converter.Since there exists great performance differences between ideal model and real circuit,in the work presented a modified model by adding the parasitical resistance of circuit components.The modified model is then employed to study the circuit performance with respect to loading effect and the variation of circuit parametric. Exact expressions of the output voltage shows that resonant switched capacitor converter performance than traditional switched capacitor converter,and provides a means of regulating the converter`s output voltage. Simulation results demonstrate the correctness of performance analysis.