ULTRA-LOW POWER BOOST CONVERTER WITH CONSTANT ON-TIME-BASED MPPT FOR ENERGY HARVESTING APPLICATIONS

作者：Chen, Mingyang; Zhao, Menglian^*; Liu, Qing; Wang, Lu; Wu, Xiaobo

来源：Journal of Circuits, Systems, and Computers, 2014, 23(2): 1450027.

DOI：10.1142/S0218126614500273

• Boost
• energy harvesting
• low power dc-dc

An ultra-low power boost converter for energy harvesting applications is introduced in this brief. The idle power dissipation is reduced to 800 nW by using a novel output voltage detector (OVD) which is insensitive to temperature variation and process deviation. Furthermore, a constant on-time (COT)-based hysteretic burst mode controller with maximum power point tracking (MPPT) technique is developed to ensure high power efficiency for a wide input voltage range. After startup, the input voltage can be set as low as 30 mV. The whole system is designed and fabricated in SMIC 0.18 mu m CMOS process, the end-to-end power efficiency of this converter can reach 49% at 350 mV input voltage and 65% at 750 mV input voltage.

• 出版日期2014-2
• 单位浙江大学