DC-DC BOOST CONVERTER
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United States of America Patent
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Issued Date -
Dec 25, 2014
app pub date -
Aug 16, 2013
filing date -
Jun 21, 2013
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
The present disclosure provides a DC-DC boost converter operating in a pulse frequency modulation mode. The DC-DC boost converter includes an inductor, a first switch, a capacitor, a second switch and a control circuit. The inductor is coupled between an input voltage node and a phase node. The first switch is coupled between the phase node and an output voltage node. The capacitor is coupled between the output voltage node and a ground. The second switch is coupled between the phase node and the ground. The control circuit controls the conducting status of the first switch and the second switch. The control circuit detects whether the voltage at the phase node is changed. When the voltage at the phase node is not changed during a predetermined time interval, the control circuit turns on the first switch. Therefore, the noise with frequency could be hear by human is avoided.
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