Patent ID: 7023186

Claim:
A power converter having first and second input terminals where an input voltage is provided and two output terminals where the output DC voltage is provided comprising: a two stage boost circuit comprising: a first stage circuit comprising a first switch alternately switched on and off as a function of a first control signal for controlling current through a first winding of a magnetically coupled inductor said first winding having one end connected to the first input terminal, a first diode, and a first capacitor, the first switch coupled between the junction of the other end of the first winding and the first diode and the second input terminal, and a second stage circuit comprising a second winding of said magnetically coupled inductor connected to the other end of said first winding and connected in series with a second diode between said first winding and the first output terminal, and a second capacitor connected across said output terminals; and a second boost converter coupled between said first capacitor and said second capacitor comprising a second switch, an inductor, and a third diode; said second switch is connected between the junction of said inductor and third diode and the second input terminal and is alternately switched on and off as a function of a second control signal.