A high efficiency single-cell cascaded charge pump topology-the competitive alternative to inductive boost converters

Author

Bayer, Erich ; Schmeller, Hans

Author_Institution

Texas Instrum. Deutschland GmbH, Freising, Germany

Volume

1

fYear

2001

fDate

6/23/1905 12:00:00 AM

Firstpage

290

Abstract

A single cell, efficiency optimized switched capacitor converter is presented. By means of a "modified cascaded" topology which supports additional conversion ratios and an automatically conversion ratio alignment to the V_OUT/V_IN-ratio an overall average efficiency above 80% and a peak efficiency close to 90% is achieved. A current-mode control helps to stabilize the operating voltage on the "flying" capacitors independent on the conversion ratio. This reduces current spikes on the input and output of the converter and keeps the output voltage glitch-free when the conversion mode is changed. To optimize the efficiency at light loads a current-saving "LinearSkip" control is implemented. The converter was realized, in a 10-Pin MSOP package and needs 5 tiny 1 uF ceramic capacitors to build a complete single cell to 3.3 V converter

Keywords

DC-DC power convertors; cascade networks; electric current control; harmonic distortion; harmonics suppression; integrated circuit packaging; power capacitors; power conversion harmonics; power integrated circuits; pumps; switched capacitor networks; 10-pin MSOP package; 3.3 V; 80 to 90 percent; DC-DC converter; ceramic capacitors; current spikes reduction; current-mode control; current-saving Linear-Skip control; flying capacitors; glitch-free output voltage; modified cascaded topology; single-cell cascaded charge pump topology; Capacitors; Charge pumps; DC-DC power converters; Power conversion; Switches; Switching converters; Switching loss; Thin film inductors; Topology; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics Specialists Conference, 2001. PESC. 2001 IEEE 32nd Annual

Conference_Location

Vancouver, BC

ISSN

0275-9306

Print_ISBN

0-7803-7067-8

Type

conf

DOI

10.1109/PESC.2001.954035

Filename

954035