CONSTANT ON-TIME SWITCHING CONVERTER AND CONTROL METHOD THEREOF
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United States of America Patent
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Issued Date -
Oct 3, 2013
app pub date -
Dec 5, 2012
filing date -
Mar 27, 2012
priority date (Note) -
Abandoned
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Abstract
A controller used in a switching converter. The switching converter includes a switching circuit having at least one switch. The controller comprises an on-time control circuit generating an on-time control signal, a slope compensation circuit generating a slope compensation signal, a comparing circuit, a logic circuit and a load detection circuit. The comparing circuit generates a comparison signal based on the slope compensation signal, a reference signal and the output voltage of the switching circuit. The logic circuit generates a control signal to control the ON and OFF switching of the at least one switch based on the on-time control signal and the comparison signal. The load detection circuit detects the load condition. The slope compensation circuit adjusts the slope compensation signal based on the load condition.
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