20.7 A 0.45-to-3V reconfigurable charge-pump energy harvester with two-dimensional MPPT for Internet of Things
20.7 A 0.45-to-3V reconfigurable charge-pump energy harvester with two-dimensional MPPT for Internet of Things
复制标题
适用于物联网的具有二维 MPPT 的 20.7 A 0.45 至 3V 可重构电荷泵能量采集器
DOI：
--
复制
发表时间：
2015
期刊：
影响因子：
--
通讯作者：
E. Sánchez
中科院分区：
文献类型：
--
作者：
Xiaosen Liu;E. Sánchez
与电感式DC-DC升压转换器[1]相比，电荷泵（CP）没有片外电感，适用于物联网（loT）智能节点等单片低功耗能量收集应用。然而，单转换比（CR） CP具有狭窄的输入电压范围。这导致电荷再分配损失（CRL），并成为阻碍高效能量收集的瓶颈。CRL源于两个事实：1)能源的工作电压随环境的变化而变化；2)不同能源的输出电压范围很广。通过将CR调优为一维，可重构CPs可以消除CRL；然而，它们需要复杂的控制算法，缺乏最大功率点跟踪（MPPT）[3]，并且只能提供分数比率[4]。因此，它们不适合从各种来源收集能量。
Compared with inductive DC-DC boost converters [1], the charge pump (CP) features no off-chip inductors and is suitable for monolithic low power energy harvesting applications such as Internet of Things (loT) smart nodes. However, the single conversion ratio (CR) CP has a narrow input voltage range. This induces a charge redistribution loss (CRL) and becomes a bottleneck preventing highly efficient energy harvesting [2]. CRL stems from two facts: 1) The operating voltages of energy sources vary with environment, and 2) Different energy sources feature a wide range of output voltages. By tuning the CR as one dimension, reconfigurable CPs can eliminate CRL; however, they need complex control algorithms, lack maximum power point tracking (MPPT) [3], and only provide fractional ratios [4]. Thus, they are not preferable for energy harvesting from various sources.