Patent ID: 7999524
Filing Date: 2011-08-16
Classification: H02M,Y02B

Abstract:
1. A method of phase management to reduce switching losses in a power converter, the power converter including a first power factor correction (PFC) pre-regulator and at least one additional interleaved PFC pre-regulator and a step down converter that is electrically coupled to the first PFC pre-regulator and to each of the at least one interleaved PFC pre-regulator, the method comprising: measuring an average input power at the step down converter including measuring an average current through a current sense device to generate an average current signal; comparing the average current signal to a reference; generating an output based on the comparison; disabling each of the at least one additional interleaved PFC pre-regulator when output power generated by the step down converter is less than a first pre-designated rated power level as determined when the output is less than a first predetermined level; and enabling each of said at least one additional interleaved PFC pre-regulator when output power generated by said step down converter is greater than a second pre-designated rated power level as determined when the output exceeds a second predetermined level.