Comparative Study of Switched Capacitor Converter Topologies for Wearable Devices

Abstract

As wearable devices with low input voltages have drawn much attention from academic and industrial fields, the use of switched capacitor converters (SCC) also increases. This is because the wearable devices are required to utilize small size power converters and SCCs have no bulky circuit components such as magnetic components. Many kinds of SCCs have been suggested but they are based on three fundamental SCC topologies that are Dickson, series-parallel and Fibonacci topologies. In this study, three topologies are theoretically analyzed and simulated. With the results from them, a comparison is conducted to provide future circuit designers with a standard to choose a proper SCC topology for wearable devices.