Patent ID: 7339361
Filing Date: 2008-03-04
Classification: H02M

Abstract:
1. A multi-phase DC-DC converter comprising: a plurality of power channels, which are operative to deliver a DC output voltage to an output node adapted to be coupled to a load, a respective ith power channel including an output voltage switching stage coupled between said output node and an input voltage terminal, to which a DC input voltage is applied, and being controllably switched by a respective ith switching waveform applied thereto, so as to deliver a respective ith DC voltage waveform to said output node; a primary output current sensing circuit having a plurality of first inputs, coupled to monitor primary sensed currents associated with voltages produced by output voltage switching stages of said plurality of power channels, and a plurality of first outputs, respectively coupled to inputs of a controller, said controller being operative to individually control parameters of respective switching waveforms that are used to controllably switch output voltage switching stages of said plurality of power channels; and a secondary output current sensing circuit, having a plurality of second inputs coupled to monitor secondary sensed currents associated with said primary sensed currents and derived in accordance with voltages applied by said output voltage switching stages to said output node, and a plurality of second outputs coupled to said inputs of said controller; and wherein said controller is operative to control parameters of said respective ith switching waveform in accordance with a primary sensed current of said ith power channel and secondary sensed currents of each of one or more others of said plurality of power channels.