Patent ID: 9742279
Date: 2017-08-22
CPC Classifications: H02M

Claim:
1. An interleaved buck converter comprising: a first switch having a first terminal that is used to receive an input voltage, a second terminal and a control terminal; a second switch having a first terminal that is coupled to said first terminal of said first switch, a second terminal and a control terminal; a third switch having a first terminal that is coupled to said second terminal of said first switch, and a second terminal that is coupled to a reference node; a fourth switch having a first terminal that is coupled to said second terminal of said second switch, and a second terminal that is coupled to the reference node; a first inductor having a first terminal that is coupled to said second terminal of said first switch, and a second terminal that is used to provide an output voltage; a second inductor coupled between said second terminal of said second switch and said second terminal of said first inductor; a third inductor coupled between said second terminals of said first and second switches; an output capacitor coupled between said second terminal of said first inductor and the reference node; and a controller coupled to said control terminals of said first and second switches, and controlling operation of each of said first and second switches between an ON state and an OFF state such that said first and second switches have the same switching period and the same ON time interval, and such that a time delay from switching of said first switch into the ON state to switching of said second switch into the ON state equals the ON time intervals of said first and second switches minus a predetermined time interval, a value of the time delay being a function of a duty cycle of operation of said first and second switches.