DC-to-DC converter and converting method of discontinuous conduction mode
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United States of America Patent
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Issued Date -
Mar 17, 2016
app pub date -
Aug 4, 2015
filing date -
Sep 15, 2014
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The present invention discloses a DC-to-DC converter of discontinuous conduction mode capable of preventing an inductor current from being reduced to zero under an idle state, comprising: an inductor operable to output the inductor current according to a DC-input signal under an energy-storage state, output the inductor current according to the DC-input signal and a DC-output signal under an energy-release state, and keep the inductor current unchanged under the idle state; a freewheel switch operable to be conductive under the idle state and nonconductive under the energy-storage and energy-release states according to a freewheel-control signal and form a current loop with the inductor; a current sensing circuit operable to detect the inductor current and generate a current-detection signal; and a control circuit operable to generate the freewheel-control signal according to the current-detection signal and control the state of the converter to be the energy-storage state, energy-release state or idle state.
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