A Flexible Switch Capacitor Circuit Suitable for Flexible Wearable Devices

Introduction Stable and high-quality power supply and bendability of flexible wearable devices are the current development needs of flexible wearable devices. Traditional converters have strong electromagnetic interference due to the existence of inductors, which affects the performance of flexible wearable devices. The paper aims to solve this problem.

Method A flexible switched capacitor converter was proposed to supply stable and high quality power to flexible wearable devices. Compared with the mainstream converter, the switched capacitor converter was designed. The capacitor was used as the energy storage element, which had the advantages of low electromagnetic interference and small size and was an excellent choice for supplying power to flexible wearable devices. At the same time, it was made of flexible materials, and all circuit components were patch type components, making it more suitable for wearable devices, and it had excellent characteristics such as small size, high efficiency and small ripple through circuit design. Finally, theoretical analysis and experimental verification were carried out.

Results The results have shown that the output efficiency of 91% at 1 W power and 86% at 3 W output power can be achieved, the maximum output voltage can reach 8 V, and the output voltage ripple is limited to less than 2%.

Conclusion It is finally proved that the flexible switched capacitor converter can provide high quality power supply for flexible wearable devices at low power.