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http://dx.doi.org/10.6109/jkiice.2016.20.9.1763

Hybrid DC-DC Converter For Power Efficiency Improvement Operating Over a Wide Load Power  

Woo, Ki-Chan (School of Electrical Engineering and Computer Science Graduate School of Chungbuk National University)
Mok, Jin-Won (Silliconworks)
Kim, Tae-Woo (School of Electrical Engineering and Computer Science Graduate School of Chungbuk National University)
Hwang, Seon-Kwang (School of Electrical Engineering and Computer Science Graduate School of Chungbuk National University)
Yang, Byung-Do (Department of Electronics Engineering, Chungbuk National University)
Publication Information
Journal of the Korea Institute of Information and Communication Engineering / v.20, no.9, 2016 , pp. 1763-1770 More about this Journal
Abstract
This paper proposed hybrid converter to operate over a wide output load power. The switched-capacitor converter has a high efficiency at low load power and a low efficiency at high load power. On the contrary, the buck converter has a high efficiency at high load power and a low efficiency at low load power. The proposed hybrid converter has combination of the switched-capacitor converter and the buck converter. The switched-capacitor operates at low load power and buck converter operates at high load power, so that the hybrid converter is improved power efficiency at wide output load power. The hybrid converter was implemented with a $0.18{\mu}m$ CMOS process. The hybrid converter has a range of the load power between $50{\mu}W$and 100mW. The maximum power efficiencies are 93% and 77% at the buck converter and the switched-capacitor converter, respectively.
Keywords
DC-DC Converter; Buck Converter; Switched-Capacitor Converter; Power Efficiency;
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