Patent ID: 7061212
Filing Date: 2006-06-13
Classification: H02M,Y02B

Abstract:
1. A power converter having an input and an output, comprising in combination: a first boost converter having an input for receiving an input voltage, an output, a first switch, and a bulk capacitor, said first boost converter for providing a boosted bulk voltage across said bulk capacitor; a second boost converter having an input coupled to the output of said first boost converter and having an output, a second switch, and a second capacitor connected across said output of said second boost converter, said second boost converter for providing a boosted voltage across said second capacitor when the voltage across said bulk capacitor is below a predetermined voltage level so as to cause the voltage on said output of said second boost converter to be regulated at said predetermined voltage level; and a first diode connected so as to bypass said second boost converter when said second boost converter is not operating so as to couple the voltage generated by said first boost converter to said output of said power converter.