Adaptive on-time switching converter
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United States of America Patent
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Jun 25, 2019
Grant Date -
Dec 28, 2017
app pub date -
Nov 28, 2016
filing date -
Jun 28, 2016
priority date (Note) -
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Abstract
Adaptive-on-time techniques to improve the frequency variations inherent in constant-on-time COT converters are presented. A switching converter contains a power switch; a pulse generator adapted to generate a pulsed signal to switch the power switch on with a switching frequency; a ramp generator adapted to generate a ramp signal; and a controller adapted to detect a parameter of the ramp signal, compare the parameter with a reference value, and to generate a control signal based on the comparison to control the switching frequency. This allows controlling a switching frequency of the converter without increasing a noise level of the converter.
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