A reconfigurable buck-boost switched capacitor converter with adaptive gain and discrete frequency scaling control

Author

George, Libin ; Lehmann, T. ; Hamilton, Tara J.

Author_Institution

Sch. of Electr. Eng. & Telecommun., Univ. of New South Wales, Sydney, NSW, Australia

fYear

2012

fDate

9-12 Dec. 2012

Firstpage

869

Lastpage

872

Abstract

This paper presents the design of a reconfigurable buck-boost switched capacitor converter using a novel control method that allows coarse and fine control of the output voltage. The converter uses adaptive gain control, discrete frequency scaling and burst mode switching to regulate the power delivered to a range of output voltages and loads. This control scheme has been implemented in a fully-integrated switched capacitor converter design using a standard bulk CMOS 0.18μm process. Simulation results show that the converter has an output voltage range of 0.8-2.2V, can deliver up to 5mA in load current and can be up to 68% efficient.

Keywords

adaptive control; capacitors; frequency control; gain control; power convertors; switched capacitor networks; adaptive gain control; burst mode switching; discrete frequency scaling control; output voltage; reconfigurable buck boost switched capacitor converter design; standard bulk CMOS process; Capacitors; Frequency conversion; Switches; Tuning; Voltage control; adaptive gain; buck-boost; burst; discrete frequency scaling; reconfigurable; switched-capacitor;

fLanguage

English

Publisher

ieee

Conference_Titel

Electronics, Circuits and Systems (ICECS), 2012 19th IEEE International Conference on

Conference_Location

Seville

Print_ISBN

978-1-4673-1261-5

Electronic_ISBN

978-1-4673-1259-2

Type

conf

DOI

10.1109/ICECS.2012.6463550

Filename

6463550