Title :
A 10mV-input boost converter with inductor peak current control and zero detection for thermoelectric energy harvesting
Author :
Shrivastava, Ashish ; Wentzloff, David ; Calhoun, Benton H.
Author_Institution :
Univ. of Virginia, Charlottesville, VA, USA
Abstract :
A boost converter for thermoelectric energy harvesting in 130nm CMOS reduces the achievable input voltage by 50% to 10mV, which allows wearable body sensors to continue operation with thermal gradients below 1oC. The design uses a peak inductor current control scheme and duty cycled, offset compensated comparators to maintain high efficiency across a broad range of input and output voltages. The measured efficiency ranges from 53% at VI=20mV to a peak efficiency of 83% at VI=300mV.
Keywords :
CMOS integrated circuits; comparators (circuits); electric current control; energy harvesting; inductors; power convertors; CMOS integrated circuit; boost converter; comparators; duty cycle; inductor; peak current control; size 130 nm; thermal gradients; thermoelectric energy harvesting; voltage 10 mV; voltage 20 mV; voltage 300 mV; wearable body sensors; zero detection; Current measurement; IP networks; Inductors; Switches; Switching circuits; Timing;
Conference_Titel :
Custom Integrated Circuits Conference (CICC), 2014 IEEE Proceedings of the
Conference_Location :
San Jose, CA
DOI :
10.1109/CICC.2014.6946057
