Patent ID: 8446099
Filing Date: 2013-05-21
Classification: H05B,Y02B

Abstract:
1. A lighting system, comprising: a plurality of light-emitting devices; an alternating current to direct current (AC-DC) converter configured to generate DC power from AC power provided by an AC power source, said AC-DC converter including an inductor, a capacitor and a plurality of switches configured to selectively couple and decouple said capacitor to and from said inductor in converting the AC power to DC power; and a divider configured to generate a plurality of DC power supplies from the DC power generated by said AC-DC converter, said plurality of DC power supplies configured to supply power to said plurality of light-emitting devices, wherein the inductor, capacitor, and switches of said AC-DC converter are configured as a buck converter during times when the AC input voltage applied to the AC-DC converter is greater than the DC output voltage Vdc produced by the AC-DC converter, and are configured as an inverting buck converter during times when the AC input voltage is less than −Vdc.