As a double-function output power management system for triboelectric nanogenerators, it delivers over 67 times charge boosting and 954 W m −2 power density in pulse mode, and achieves over 94% total energy transfer efficiency in constant mode. Herein, we propose a fractal-design based switched-capacitor-convertors with characteristics including high conversion efficiency, minimum output impedance, and electrostatic voltage applicability.
However, the high output impedance and switching loss largely reduces its power efficiency, due to imperfect topology and transistors. Owing to the advantages of integration and being magnet-free and light-weight, the switched-capacitor-convertor plays an increasing role compared to traditional transformer in some specific power supply systems.
