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A DC-DC Converter Design with Internal Capacitor for TFT-LCD Driver IC  

Lim Gyu-Ho (창원대학교 전자공학과)
Kang Hyung-Geun (창원대학교 전자공학과)
Lee Jae-Hyung (창원대학교 전자공학과)
Sohn Ki-Sung (매그나칩 반도체)
Cho Ki-Seok (매그나칩 반도체)
Baek Seung-Myun (창원대학교 전자공학과)
Sung Kwan-Young (창원대학교 전자공학과)
Li Long-Zhen (창원대학교 전자공학과)
Park Mu-Hun (창원대학교 전자공학과)
Ha Pan-Bong (창원대학교 전자공학과)
Kim Young-Hee (창원대학교 전자공학과)
Publication Information
Journal of the Korea Institute of Information and Communication Engineering / v.10, no.7, 2006 , pp. 1266-1274 More about this Journal
Abstract
A non-overlap boosted-clock charge pump(NBCCP) with internal pumping capacitor, an advantageous circuit from a minimizing point of TFT-LCD driver IC module, is proposed in this paper. By using the non-overlap boosted-clock swinging in 2VDC voltage, the number of pumping stages is reduced to half and a back current of pumping charge from charge pumping node to input stage is also prevented compared with conventional cross-coupled charge pump with internal pumping capacitor. As a result, pumping current of the proposed NBCCP circuit is increased more than conventional cross-coupled charge pump, and a layout area is decreased. A proposed DC-DC converter for TFT-LCD driver IC is designed with $0.18{\mu}m$ triple-well CMOS process and a test chip is in the marking.
Keywords
DC-DC Converter; Boosted-Clock Charge Pump; Pumping Capacitor; TFT-LCD;
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  • Reference
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