Patent ID: 9081397
Filing Date: 2015-07-14
Classification: G05F,H02M

Abstract:
1. A controller used in a multi-phase switching converter, wherein the multi-phase switching converter comprises a plurality of switching circuits, each of the plurality of switching circuits having an output terminal, and the output terminals are coupled together to provide an output voltage, the controller comprises: a comparing circuit coupled to the output terminals of the plurality of switching circuits, wherein based on a reference signal and the output voltage, the comparing circuit generates a comparison signal; and a control circuit coupled to the comparing circuit to receive the comparison signal, wherein based on the comparison signal, the control circuit generates a plurality of control signals to turn on the plurality of switching circuits successively; wherein when the on-time of a current switching circuit of the plurality of switching circuits is longer than the difference between a first time threshold and a second time threshold, the control circuit can turn on a following switching circuit of the plurality of switching circuits based on the comparison signal only after the time from the current switching circuit being turned on reaches the first time threshold; and when the on-time of the current switching circuit is shorter than the difference between the first time threshold and the second time threshold, the control circuit can turn on the following switching circuit based on the comparison signal only after the off-time of the current switching circuit reaches a second time threshold, wherein the first time threshold is longer than the second time threshold.