Patent ID: 9531272
Filing Date: 2016-12-27
CPC Classification: H02M

Claim Text:
1. A two-phase interleaved converter comprising: two sub-circuits including inputs which are connected in parallel to each other and outputs which are connected in parallel to each other in order to convert a direct current (DC) or an alternating current (AC) input voltage into a DC output voltage having a level different from a level of the input voltage; a voltage controller configured to receive the DC output voltage of the two sub-circuits and output a current reference signal; a current controller configured to receive the current reference signal output by the voltage controller and an inductor current from one of the two sub-circuits and to output a control signal; a balancing controller configured to receive values of currents output from the two sub-circuits and to calculate a difference between the values of the currents output from the two sub-circuits in order to control a duty ratio of the control signal output from the current controller, and configured to output a first and second control signals in which the duty ratio is controlled; and a phase shifter configured to shift a phase of the second control signal output from the balancing controller and output a phase-shifted control signal, wherein one of the two sub-circuits directly receives the first control signal output from the balancing controller, and a remaining sub-circuit receives the phase-shifted control signal from the phase shifter, and wherein the balancing controller is further configured to: subtract a value of the inductor current of the one sub-circuit from a value of the inductor current of the remaining sub-circuit to obtain a difference value, integrate the difference value to obtain a duty-ratio difference value, multiply the duty ratio of the control signal output from the current controller by a value which is obtained by subtracting the duty-ratio difference value from ‘1’ in order to apply a multiplying result to the one sub-circuit as the first control signal output from the balancing controller, and multiply the duty ratio of the control signal output from the current controller by a value which is obtained by adding the duty-ratio difference value to ‘1’ in order to apply a multiplying result to the remaining sub-circuit as the second control signal output from the balancing controller.