On-chip current sensing techniques for buck converter = Buck converter를 위한 집적화한 전류 검출 기술

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Current sensor is an absolutely needed component for over-current-protection, and for loop stability control in the current mode control buck system, in which, the protection ability and the stability of the system depend on the accuracy of the current sensor. Among several lossless current sensing methods, the MOSFET-based current sensing and inductor-based current sensing are standout as simple and convenient current sensing methods, especially for on-chip current sensor design. In this paper, several up-to-date reported designs are reviewed and discussed, especially about their speed, accuracy and power consumption. In addition, for the MOSFET-based current sensing method, “A 5 MHz Power Saving Current Sensor with Adaptive Bias and Forced Slew Rate Providing Sensibility For Duty Range from 20% to 80%” is proposed and verified by simulation. For the inductor-based current sensing method, a detailed analysis of the recent current sensor state of the art in [17] is performed to reduce its unnecessary structure. Finally, design considerations for correctness and transient enhancing are discussed.
Advisors
Lee, Sang-Gugresearcher이상국researcher
Description
한국과학기술원 :전기및전자공학과,
Publisher
한국과학기술원
Issue Date
2014
Identifier
325007
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 전기및전자공학과, 2014.8,[iii, 39 p. :]

Keywords

DC-DC Converter; Current Sense; Lossless Current Sense; System-on-chip (SOC); 직류-직류 변환기; 전류 센스; 무손실 전류 센스; 시스템-온-칩 (SOC)

URI
http://hdl.handle.net/10203/243219
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=669173&flag=dissertation
Appears in Collection
EE-Theses_Master(석사논문)
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