An audible noise reduction circuit adjusts either one of the reference voltage, the current sense voltage or the current sense resistor based on a detected switching frequency such that {HEAD ~ the controller} maintains {TAIL ~ the switching frequency} above the audible frequency range in response to an adjustment 
maintains
An audible noise reduction circuit adjusts either one of the reference voltage , the current sense voltage or the current sense resistor based on a detected switching frequency such that { HEAD ~ the controller } maintains { TAIL ~ the switching frequency } above the audible frequency range in response to an adjustment
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