A 20 mV Input Boost Converter With Efficient Digital Control for Thermoelectric Energy Harvesting

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...

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Veröffentlicht in:	IEEE journal of solid-state circuits 2010-04, Vol.45 (4), p.741-750
Hauptverfasser:	Carlson, E.J., Strunz, K., Otis, B.P.
Format:	Artikel
Sprache:	eng
Schlagworte:	Applied sciences Boost converter Circuit properties Circuits Converters DC-DC power converters Design. Technologies. Operation analysis. Testing Digital circuits Digital control Direct power generation discontinuous conduction mode Electric potential Electric, optical and optoelectronic circuits Electronic circuits Electronics Energy harvesting Exact sciences and technology Harvesting Inductors Integrated circuits low power Low voltage Monitoring Power generation power scavenging Pulse modulation pulse-frequency modulation Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices Signal convertors Supplying synchronous DC-DC converter Temperature Thermoelectric, pyroelectric devices, etc Thermoelectricity Voltage Voltage control
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Beschreibung
Zusammenfassung:	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 thermoelectric generator powered by body heat. The converter, fabricated in a 0.13 ¿m CMOS process, operates from input voltages ranging from 20 mV to 250 mV while supplying a regulated 1 V output. The converter consumes 1.6 (1.1) ¿W of quiescent power, delivers up to 25 (175) ¿W of output power, and is 46 (75)% efficient for a 20 mV and 100 mV input, respectively.
ISSN:	0018-9200 1558-173X
DOI:	10.1109/JSSC.2010.2042251