Efficiency improvement in buck-boost converter aimed at SOC utilization

Author

Wang, Ke ; Geng, Li ; Meng, Qingrui

Author_Institution

Sch. of Electron. & Inf. Eng., Xian Jiaotong Univ., Xian

fYear

2008

fDate

21-24 April 2008

Firstpage

1

Lastpage

5

Abstract

DC-DC converters are required to supply various levels of voltages from batteries to different systems. In order to extend the lifetime of battery, it is very important to optimize the efficiency of the DC-DC converter, especially the light load efficiency. In this paper, considerations of the efficiency variation of a PWM synchronous buck-boost converter are made to minimize the power loss. Several new techniques such as channel width regulation, variable threshold voltage, switch activation and gate charge modulation are used. Simulation results show that the efficiency can be improved by more than 15% when the converter works on its light load.

Keywords

DC-DC power convertors; integrated circuit design; DC-DC converters; SOC utilization; buck-boost converter; Batteries; DC-DC power converters; MOSFET circuits; Pulse width modulation; Pulse width modulation converters; Switches; Switching converters; Switching frequency; Switching loss; Threshold voltage; buck-boost converter; channel width regulation; efficiency optimization; switch activation; variable threshold voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Industrial Technology, 2008. ICIT 2008. IEEE International Conference on

Conference_Location

Chengdu

Print_ISBN

978-1-4244-1705-6

Electronic_ISBN

978-1-4244-1706-3

Type

conf

DOI

10.1109/ICIT.2008.4608490

Filename

4608490