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A control circuit for a microsensor hybrid power supply

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4 Author(s)
Bennett, D.A. ; Dept. of Electr. & Comput. Eng., Brigham Young Univ., Provo, UT, USA ; Selfridge, Richard H. ; Harb, J.N. ; Comer, D.T.

This paper presents a simple low-power control circuit intended to manage the power within a remote autonomous microsystem hybrid power supply. A hybrid power supply has only recently been discussed in the literature as a microsystem power source solution. The power management circuitry, which is a key component within a hybrid power supply, has not been adequately explored. Although a variety of components could have been implemented, the control circuit in this paper was designed for a hybrid power supply that utilizes a Ni/Zn microbattery and silicon solar cell. The circuit also employs a shunt architecture powered only by the solar cell to minimize the overall energy consumption of the hybrid power supply. The control circuit consumes a maximum of 7 μA and appropriately manages power even when the hybrid power supply is connected to a microsystem and is experiencing environmental variations. Details of the control circuit are discussed and simulations combined with experimental results demonstrate its performance.

Published in:

Industrial Electronics, IEEE Transactions on  (Volume:51 ,  Issue: 1 )

Date of Publication:

Feb. 2004

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