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http://dx.doi.org/10.5573/ieie.2015.52.2.089

High Efficiency Triple Mode Boost DC-DC Converter Using Pulse-Width Modulation  

Lee, Seunghyeong (School of Electronic and Electrical Engineering, Hongik University)
Han, Sangwoo (School of Electronic and Electrical Engineering, Hongik University)
Kim, Jongsun (School of Electronic and Electrical Engineering, Hongik University)
Publication Information
Journal of the Institute of Electronics and Information Engineers / v.52, no.2, 2015 , pp. 89-96 More about this Journal
Abstract
This paper presents a high efficiency, PSM/DCM/CCM triple mode boost DC-DC converter for mobile application. This device operates at Pulse-Skipping Mode(PSM) when it enters light load, and otherwise operate the operating frequency of 1.4MHz with Pulse-Width Modulation(PWM) mode. Especially in order to improve the efficiency during the Discontinuous-Conduction Mode(DCM) operation period, the reverse current prevention circuit and oscillations caused by the inductor and the parasitic capacitor to prevent the Ringing killer circuit is added. The input voltage of the boost converter ranges from 2.5V ~ 4.2V and it generates the output of 4.8V. The measurement results show that the boost converter provides a peak efficiency of 92% on CCM and 87% on DCM. And an efficiency-improving PWM operation raises the efficiency drop because of transition from PWM to PFM. The converter has been fabricated with a 0.18um Dongbu BCDMOS technology.
Keywords
DC-DC converter CCM; DCM; Power Management; Boost Converter;
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