20.1 A light-load-efficient 11/1 switched-capacitor DC-DC converter with 94.7% efficiency while delivering 100mW at 3.3V

Author

Meyvaert, Hans ; Pique, Gerard Villar ; Karadi, Ravi ; Bergveld, Henk Jan ; Steyaert, Michiel

Author_Institution

KU Leuven, Leuven, Belgium

fYear

2015

fDate

22-26 Feb. 2015

Firstpage

1

Lastpage

3

Abstract

Getting from the mains to a few volts to power electronic circuits requires a very large voltage conversion ratio since the rectified US and EU mains have DC levels of 169V and 325V, respectively. Primary converters, such as flyback converters, use the winding ratio of the isolation transformer to achieve large step-down ratios and generate bus voltages of about 12V. The higher the bus voltage, the higher the efficiency of the primary converter can be and the lower the bus impedance loss. This motivates the investigation of highly efficient DC-DC converters with high voltage conversion ratios (VCRs) to use as secondary converters in AC-DC applications.

Keywords

AC-DC power convertors; DC-DC power convertors; capacitor switching; electric impedance; power transformers; AC-DC applications; bus impedance loss; bus voltage generation; flyback converters; high voltage conversion ratios; isolation transformer; light-load-efficient switched-capacitor DC-DC converter; power 100 mW; power electronic circuits; primary converters; secondary converters; step-down ratios; very large voltage conversion ratio; voltage 12 V; voltage 169 V; voltage 3.3 V; voltage 325 V; winding ratio; Capacitors; DC-DC power converters; MIMO; Rails; Switches; Topology; Video recording;

fLanguage

English

Publisher

ieee

Conference_Titel

Solid- State Circuits Conference - (ISSCC), 2015 IEEE International

Conference_Location

San Francisco, CA

Print_ISBN

978-1-4799-6223-5

Type

conf

DOI

10.1109/ISSCC.2015.7063074

Filename

7063074