Analysis of Cross-Connected Fibonacci Switched Capacitor Converter

Wanglok Do, Kei Eguchi
2020 ICIC Express Letters  
As semiconductor technology has advanced, various electric products such as flash memory and LED driver circuits use SCCs (switched capacitor converters) as power converters for them. This trend brings an issue that the higher performance SCCs have, the better quality the products can have. Up until now, many types of SCCs have been suggested. However, most of them are operated by the way that charging and discharging steps are separated. To overcome this, the CCFSCC (cross-connected Fibonacci
more » ... witched capacitor converter) with its symmetric structure was designed. In this paper, the CCFSCC is analyzed and compared with 2 different SCCs. From the analysis of the CCFSCC, we optimize the sizes of its capacitors and derive its power stage transfer function. Simulation and comparison show that the CCFSCC is confirmed to have high power efficiency, low output ripple voltage and middle circuit size among others.
doi:10.24507/icicel.14.02.145 fatcat:klwf4xwfjngztmltjtiynqalyi