← 返回 JSSC 论文列表JSSC 2010第4期Power Management0.13μmBoost ConverterEnergy Harvesting
A 20 mV Input Boost Converter With Efficient Digital Control for Thermoelectric E
一种20mV输入升压转换器,采用高效数字控制技术,适用于热电能量收集。
0.13μm CMOS, 20mV-250mV输入, 1V输出, 46%-75%效率
升压转换器热电能量收集数字控制低功耗同步整流
▸创新点1:在断续导通模式(DCM)下实现同步整流,通过优化开关时序和栅极驱动电路,显著降低导通损耗,提升转换效率15%以上,尤其适用于高电压转换比(>20)场景。
▸创新点2:提出一种超低功耗输入电压监测方法,采用自适应采样和数字校准技术,仅消耗纳瓦级功耗,确保20mV至250mV宽输入范围内的稳定监测,支持体热驱动的热电发电机应用。
▸创新点3:系统级创新设计,集成0.13μm CMOS工艺的升压转换器,在20mV输入下实现46%效率(100mV时达75%),静态功耗仅1.6μW,输出功率可达25μW(100mV时175μW),突破极低压能量采集的功耗瓶颈。
▸创新点4:引入动态频率调整机制,根据输入电压和负载变化实时调节开关频率,优化轻载效率,扩展工作范围至超低压(20mV)与常规电压(250mV)兼容场景。
Abstract
This paper presents a low power boost converter for
thermoelectric energy harvesting that demonstrates an efficiency
that is 15% higher than the state-of-the-art for voltage conversion
ratios above 20. This is achieved by utilizing a technique allowing
synchronous rectification in the discontinuous conduction mode. A
low-power method for input voltage monitoring is presented. The
low input voltage requirements allow operation from a thermoelec-
tric generator powered by body heat. The converter, f