Journal
ANALOG INTEGRATED CIRCUITS AND SIGNAL PROCESSING
Volume 66, Issue 2, Pages 163-170Publisher
SPRINGER
DOI: 10.1007/s10470-010-9532-2
Keywords
DC-DC converter; Power management IC; Buck converter; Current-sensing; Analog circuit
Funding
- MEST [2010-0000203]
- National Research Foundation of Korea [2008-0058522] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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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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