An interleaved boost converter , comprising: a first converter operating as a master converter to receive an input power and generate a first converted output power. a second converter operating as a slave converter to receive the input power and generate a second converted output power, wherein the first converted output power and the second converted output power are interleaved; a cycle controller to generate a first drive signal to control switching of the first converter and a second drive signal to control switching of the second converter, to receive a first cycle signal from the first converter and a second cycle signal from the second converter, wherein the first cycle signal and the second cycle signal have a power phase time corresponding to a power phase of the respective converter and a ringing phase time corresponding to a ringing phase of the respective converter, the cycle controller to determine a master ringing phase time of the first cycle signal and to apply the master ringing phase time to the second cycle signal to determine a slave ringing phase time, the cycle controller generating the second drive signal in accordance with the slave ringing phase time; characterized in that the master ringing phase time comprises a master time duration corresponding to a number of valleys of the ringing phase of the first cycle signal , wherein the cycle controller applies the master time duration to the ringing phase of the second cycle signal and determines the slave ringing phase time as ending at a valley of the ringing phase of the second cycle signal that is closest to an end of the master time duration. a first converter operating as a master converter to receive an input power and generate a first converted output power. a second converter operating as a slave converter to receive the input power and generate a second converted output power, wherein the first converted output power and the second converted output power are interleaved; a cycle controller to generate a first drive signal to control switching of the first converter and a second drive signal to control switching of the second converter, to receive a first cycle signal from the first converter and a second cycle signal from the second converter, wherein the first cycle signal and the second cycle signal have a power phase time corresponding to a power phase of the respective converter and a ringing phase time corresponding to a ringing phase of the respective converter, the cycle controller to determine a master ringing phase time of the first cycle signal and to apply the master ringing phase time to the second cycle signal to determine a slave ringing phase time, the cycle controller generating the second drive signal in accordance with the slave ringing phase time; characterized in that the master ringing phase time comprises a master time duration corresponding to a number of valleys of the ringing phase of the first cycle signal , wherein the cycle controller applies the master time duration to the ringing phase of the second cycle signal and determines the slave ringing phase time as ending at a valley of the ringing phase of the second cycle signal that is closest to an end of the master time duration. <EOS>