Fig. 2: The principle of FSCC power management system. | Nature Communications

Fig. 2: The principle of FSCC power management system.

From: Switched-capacitor-convertors based on fractal design for output power management of triboelectric nanogenerator

Fig. 2: The principle of FSCC power management system.The alternative text for this image may have been generated using AI.

a Initialization state of 4 = 2 × 2 FSCC system. b, c The step-down process during a charging/discharging cycle. The FSCC can achieve multifold charge output through the auto-switch of capacitors from serial to parallel connection. d The equivalent diagram of discharging process of FSCC in c. The turn-on voltage drop of diode has a significant influence on charge output. e The output voltage and f the output charge of 24-unit FSCC with different orders. 1st order FSCC has the largest turn-on voltage drop and the output charge increases rapidly with multi-order FSCC. g Photograph of triboelectric nanogenerator (TENG) with a contact switch in this work. h Schematic diagram of the power management system, which consists of a TENG, half-rectifier circuit, contact switch and FSCC, and there are two output modes in pulse and constant after power management.

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