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Capacitive Power Management Circuit for Micropower Thermoelectric Generators With a 1.4 \mu A Controller

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4 Author(s)
Doms, I. ; IMEC, Leuven, Belgium ; Merken, P. ; Van Hoof, C. ; Mertens, R.P.

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%.

Published in:

Solid-State Circuits, IEEE Journal of  (Volume:44 ,  Issue: 10 )