Patent ID: 7808219
Filing Date: 2010-10-05
Classification: H02M

Abstract:
1. An AC/DC power converter coupled to an AC voltage source having a ground terminal and a power terminal, the AC/DC power converter comprising: a first stage comprising a capacitor divider, the capacitor divider further comprised of a plurality of capacitors directly connected in series between the AC voltage source ground terminal and the AC voltage source power terminal, a selected capacitor from the plurality of capacitors with a capacitor power terminal and a capacitor ground terminal, wherein the capacitor terminals provide a voltage across the selected capacitor; a rectifier receiving the voltage across the capacitor power terminal and the capacitor ground terminal and providing an unregulated DC voltage across a rectifier output terminal and a rectifier ground terminal; and a second stage comprising a switch mode power converter having an output power terminal and an output ground terminal, the second stage receiving the unregulated DC voltage from the rectifier and providing a regulated DC voltage across the output power terminal and the output ground terminal wherein the AC voltage source provides an input voltage in a range of from about 90 V to about 180 V rms and an input frequency in a range of from about 360 Hz to about 800 Hz.