Capacitive Power Management Circuit for Micropower Thermoelectric Generators With a 1.4 $\mu$A Controller
Authors:
- 22 September 2009
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Journal of Solid-State Circuits
- Vol. 44 (10) , 2824-2833
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%.Keywords
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