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A 400-mA current-mode buck converter with a self-trimming current sensing scheme
- Authors
- Ahn, Youngkook; Heo, Donghun; Nam, Hyunseok; Roh, Jeongjin
- Issue Date
- Feb-2011
- Publisher
- SPRINGER
- Keywords
- DC-DC converter; Power management IC; Buck converter; Current-sensing; Analog circuit
- Citation
- ANALOG INTEGRATED CIRCUITS AND SIGNAL PROCESSING, v.66, no.2, pp.163 - 170
- Indexed
- SCIE
SCOPUS
- Journal Title
- ANALOG INTEGRATED CIRCUITS AND SIGNAL PROCESSING
- Volume
- 66
- Number
- 2
- Start Page
- 163
- End Page
- 170
- ISSN
- 0925-1030
- Abstract
- A current-programmed mode (CPM) controller is designed for improved DC-DC converter control. The key building block of the CPM controller is an accurate current-sensing circuit. This paper proposes a lossless current-sensing technique to measure the inductor current by measuring the current through the power transistor. A self-trimming circuit is used to compensate for any inaccuracies caused by voltage and temperature variations. The measurement results validate the operation of the fabricated chip.
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Related Researcher
- Roh, Jeong jin
- ERICA 공학대학 (SCHOOL OF ELECTRICAL ENGINEERING)