Analysis and design of SC DC-DC converter for maximum efficiency

Author

Pongswatd, Sawai ; Petchmaneelumka, Wandee ; Prapamonton, Yongyuth ; Eguchi, Kei ; Sasaki, Hirofumi

Author_Institution

Fac. of Eng., King Mongkut´´s Inst. of Technol. Ladkrabang, Bangkok, Thailand

fYear

2010

fDate

18-21 Aug. 2010

Firstpage

327

Lastpage

330

Abstract

In this paper, a multiple-state step-up DC-DC converter using switched-capacitor (SC) technique for mobile back-lighting applications is analyzed. Theoretical formulas concerning the conversion ratio between input and output, power efficiency and equivalent circuit are given to estimate the circuit characteristics. To achieve maximum efficiency, the design of clock duty cycle for each state of 4-state circuit structure is presented as an illustrative case study. Based on the proposed analysis and design, the focused DC-DC converter can provide not only maximum efficiency but also wide input range. Simulation and experimental results that agree well with theoretical values are included to confirm the proposed analysis and design.

Keywords

DC-DC power convertors; network analysis; network synthesis; switched capacitor networks; 4-state circuit structure; SC DC-DC converter; circuit characteristics; clock duty cycle; equivalent circuit; maximum efficiency; mobile backlighting application; multiple-state step-up DC-DC converter; switched-capacitor technique; Analytical models; Clocks; Converters; Equivalent circuits; Integrated circuit modeling; Resistance; SPICE; DC-DC converter; Maximum efficiency; Switched-capacitor; duty cycle;

fLanguage

English

Publisher

ieee

Conference_Titel

SICE Annual Conference 2010, Proceedings of

Conference_Location

Taipei

Print_ISBN

978-1-4244-7642-8

Type

conf

Filename

5602724