Patent ID: 7301317

Claim:
A PWM down-converter for a current sharing system, comprising: a first PWM converter, comprising: a first PWM switching circuit receiving a first rail voltage and having a first phase node and a first regulation feedback input; a first inductor coupled between said first phase node and a shared output; a first RC filter coupled between said first phase node and said shared output and having a first intermediate node; and a first feedback circuit coupled between said first intermediate node and said first regulation feedback input; and a second PWM converter, comprising: a second PWM switching circuit receiving a second rail voltage and having a second phase node and a second regulation feedback input, wherein said first rail voltage and said second rail voltage have different voltage levels; a second inductor coupled between said second phase node and said shared output; a second RC filter coupled between said second phase node and said shared output and having a second intermediate node; and a second feedback circuit coupled between said second intermediate node and said second regulation feedback input; and wherein said first RC filter and said first feedback circuit are configured to program a predetermined first percentage of full power distribution to said shared output, and wherein said second RC filter and said second feedback circuit are configured to program a predetermined second percentage of full power distribution to said shared output.