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引用次数: 22
摘要
本文介绍了一种具有自调节源负载的全集成开关电容电压变换器的实现方法。充电控制单元可确保改善负载与电源的匹配,电源可以是RFID天线或振动能量收集发电机。与自适应叠加方案相结合,还实现了电压上升转换,导致电容器存储电压高于发电机电压幅值。这和改进的负载匹配导致更高的发电机输出功率。此外,由于开关电容充电泵不需要二极管进行整流。转换器设计完全实现并完全集成在标准的0.35 μ m双孔CMOS工艺中。发电机功率可达780 μ W,最大转换效率接近48%。输入电压幅值可能在0.5 V - 2.5 V之间,而电源电压范围为0.9 V - 3.6 V。
A self-adaptive switched-capacitor voltage converter with dynamic input load control for energy harvesting
This paper presents an implementation of a fully-integrated switched capacitor voltage converter with self-adjusting source loading. A charge control unit ensures improved load matching to the power source, which can be an RFID antenna or vibration energy harvesting generator. In conjunction with an adaptive stacking scheme voltage-up conversion is also realized leading to capacitor storage voltages which are higher than the generator voltage amplitudes. This and the improved load matching result in a higher generator output power. In addition, due to the switched capacitor charge pump no diode for rectification is necessary. The converter design is completely implemented and fully-integrated in a standard 0.35 µm twin-well CMOS process. Generator powers of up to 780 µW can be treated, and maximum conversion efficiency is close to 48%. Input voltage amplitudes are possible between 0.5 V – 2.5 V , while the supply voltage range is 0.9 V – 3.6 V.