Patent ID: 9660534
Date: 2017-05-23
CPC Classifications: H02M

Claim:
1. A control circuit for a multiphase switching converter, the multiphase switching converter having a plurality of switching circuits and an output terminal configured to provide an output voltage, the control circuit comprising: a first comparison circuit configured to provide a comparison signal based on a reference signal and the output voltage; an overshoot control circuit configured to provide an overshoot control signal based on the output voltage and an overshoot threshold, wherein the overshoot threshold is larger than the reference signal; and a switching control circuit configured to provide a plurality of switching control signals to control the plurality of switching circuits based on the comparison signal and the overshoot control signal, wherein the switching control circuit is configured to turn ON the plurality of switching circuits successively based on the comparison signal; wherein when the overshoot control signal indicates that the output voltage is overshooting, the switching control circuit is configured to turn OFF a current switching circuit; and wherein when the overshoot control signal indicates that the output voltage recovers from overshooting, the switching control circuit is configured to turn ON the current switching circuit again for a first time period, wherein a sum of the first time period and a second time period equals a predetermined value, and wherein the second time period is a time period that the current switching circuit maintains ON uninterruptedly before the output voltage is detected overshooting.