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

fYear

2014

fDate

15-17 Sept. 2014

Firstpage

1

Lastpage

4

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 1^oC. 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 V_I=20mV to a peak efficiency of 83% at V_I=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;

fLanguage

English

Publisher

ieee

Conference_Titel

Custom Integrated Circuits Conference (CICC), 2014 IEEE Proceedings of the

Conference_Location

San Jose, CA

Type

conf

DOI

10.1109/CICC.2014.6946057

Filename

6946057