Patent ID: 7675277
Filing Date: 2010-03-09
Classification: H02M

Abstract:
1. A multiphase DC chopper, comprising: an input capacitor providing an input voltage; an output capacitor outputting an output voltage converted from the input voltage; a plurality N of DC choppers connected in parallel between said input capacitor and said output capacitor, with an nth one of said DC choppers, with nε[2, . . . , N], having an output outputting a nth charge current for charging said output capacitor; and a regulation device regulating a phase difference signal of two charge currents sequentially charging said output capacitor to a value of wherein said nth DC chopper has a peak current detection device providing a peak current detection signal if the nth charge current of said nth DC chopper is greater than a required current value signal predetermined for said nth DC chopper; and wherein said regulation device includes at least a first RS flip-flop having an output and at least for said nth DC chopper provides at said output an nth phase difference signal derived from a phase difference between a nth peak current detection signal and an (n+1)th peak current detection signal or from an nth ring-back detection signal and an (n+1)th ring-back detection signal or from an nth control signal and an (n+1)th control signal.