Phase control of interleaved boost converter using cycle ring time

A method comprising:

• receiving an input power at a first converter and at a second converter;
• generating an output power as an interleaved output of the first converter and the second converter;
• generating a first drive signal to control switching of the first converter;
• receiving a first cycle signal from the first converter;
• receiving a second cycle signal from the second converter, wherein the first and the second cycle signals have a power phase time corresponding to a power phase of a respective converter and a ringing phase time corresponding to a ringing phase of the respective converter;
• determining a master ringing phase time of the first cycle signal;
• applying the master ringing phase time to the second cycle signal to determine a slave ringing phase time;
• and
• generating a second drive signal to control switching of the second converter in accordance with the slave ringing phase time.

An interleaved boost converter controller, comprising:

• an output to provide a first drive signal to control switching of a first converter, the first converter to receive an input power and generate a first converted output power;
• an output to provide a second drive signal to control switching of a second converter, the second converter to receive the input power and generate a second interleaved output power;
• an input to receive a first cycle signal from the first converter;
• an input to receive a second cycle signal from the second converter, wherein the first and the second cycle signals have a power phase time corresponding to a power phase of a respective converter and a ringing phase time corresponding to a ringing phase of the respective converter;
• and
• control means within the interleaved boost converter 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 interleaved boost converter controller generating the second drive signal in accordance with the slave ringing phase time.