Capacitive Power Management Circuit for Micropower Thermoelectric Generators With a 1.4 $mu$A Controller
Doms, I.
Merken, P.
Van Hoof, C.
Mertens, R.P.
IMEC, Leuven, Belgium;
This paper appears in: Solid-State Circuits, IEEE Journal of
Publication Date: Oct. 2009
Volume: 44,
Issue: 10
On page(s): 2824-2833
ISSN: 0018-9200
INSPEC Accession Number: 10880523
Digital Object Identifier: 10.1109/JSSC.2009.2027546
Current Version Published: 2009-09-22
Abstract
Power autonomy is an important requirement for wireless sensor nodes. Thermoelectric generators can produce sufficient power for low power applications. Due to varying temperature, a power management circuit will be required. This paper presents such a power management circuit, realized in the AMIS I3T80 CMOS technology. It contains a Dickson charge pump with a variable number of stages as a DC/DC converter. A controller optimizes the number of stages of the charge pump, consuming 1.4 muA. The maximum efficiency of the charge pump is 82%, leading to a total efficiency that can reach up to 58%.
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