Analysis and Design of a High Efficiency Boost DC-DC Converter Based on Pulse-Frequency Modulation

Author

Liu, Xin ; Guo, Shuxu ; Wang, Shuai ; Xu, Feng ; Du, Guotong ; Chang, Yuchun

Author_Institution

Jilin Univ., Jilin

fYear

2007

fDate

26-28 Sept. 2007

Firstpage

398

Lastpage

401

Abstract

A high efficiency boost DC-DC converter controlled by current-limited and minimum off-time pulse-frequency modulation (PFM) mode is analyzed in this paper. The boost converter operating in discontinuous conduction mode (DCM) is modeled by the state-space average method, and is simulated by Matlab. The converter controlled by this PFM has lower power consumption, higher efficiency, smaller output ripple, and better regulation. The converter is designed and simulated using the UMC 0.6 mum 30 V BCD process. Hspice simulation results show that, the converter can operate with supply voltage from 2.7 V to 5.5 V, and boost voltage up to the fixed 15 V steadily. The output ripple voltage is about 220 mV with 1 muF capacitor and 22 muH inductor. The power efficiency is nearly above 80% for the full load, maximum to 87%.

Keywords

DC-DC power convertors; pulse frequency modulation; boost DC-DC converter; discontinuous conduction mode; minimum off-time pulse-frequency modulation; pulse-frequency modulation; state-space average method; DC-DC power converters; Feedback control; Inductors; Pulse modulation; Pulse width modulation; Pulse width modulation converters; Switching converters; Switching frequency; Switching loss; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Integrated Circuits, 2007. ISIC '07. International Symposium on

Conference_Location

Singapore

Print_ISBN

978-1-4244-0797-2

Electronic_ISBN

978-1-4244-0797-2

Type

conf

DOI

10.1109/ISICIR.2007.4441882

Filename

4441882