A high energy efficiency PSM/PWM dual-mode for DC-DC converter in portable applications

Author

Luo, Ping ; Deng, Wenjun ; Li, Hangbiao ; Zhen, Shaowei

Author_Institution

Sch. of Microelectron. & Solid-State Electron., Univ. of Electron. Sci. & Technol. of China, Chengdu, China

fYear

2009

fDate

23-25 July 2009

Firstpage

702

Lastpage

706

Abstract

Based on the energy conservation rule, an unideal energy balance (UEB) model of a DC-DC converter in discontinuous conduction mode (DCM) is built and the energy efficiency of the power converter is studied. A high energy efficiency PSM/PWM dual-mode for DC-DC converter is proposed in this paper after compared the energy efficiencies of the converter in pulse skip modulation (PSM) mode and pulse width modulation (PWM) mode separately. According to the real time value of energy efficiency, PSM mode is adopted for light loads, while, PWM mode is used for moderate or heavy loads in the proposed PSM/PWM dual-mode, that make the converter keep high energy efficiency in the whole variable loads range. The real time value of energy efficiency is easy to be calculated by the DSP/CPU in the System on Chip (SoC) of a portable appliance and transferred through the data interface I²C.

Keywords

DC-DC power convertors; PWM power convertors; energy conservation; system-on-chip; DC-DC converter; DSP-CPU system; PSM-PWM dual-mode converter; data interface; discontinuous conduction mode; energy conservation rule; portable application; portable applications; pulse skip modulation; pulse width modulation; system on chip; unideal energy balance model; DC-DC power converters; Diodes; Energy conservation; Energy efficiency; Home appliances; Inductors; Power integrated circuits; Pulse width modulation; Pulse width modulation converters; System-on-a-chip;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications, Circuits and Systems, 2009. ICCCAS 2009. International Conference on

Conference_Location

Milpitas, CA

Print_ISBN

978-1-4244-4886-9

Electronic_ISBN

978-1-4244-4888-3

Type

conf

DOI

10.1109/ICCCAS.2009.5250420

Filename

5250420