Patent ID: 6563721
Filing Date: 2003-05-13
Classification: H02M

Abstract:
A power supply for delivering a constant DC output from a wide range of AC input voltages, said power supply comprising:a transformer in combination with a switching power supply circuit, wherein said transformer includes a primary winding to which said wide range of AC input voltages is applied and a secondary winding for supplying said AC voltage range as an input voltage to said switching power supply; wherein said switching power supply circuit includes an input terminal for acceptance of said wide range of AC input voltages from said secondary winding, an output terminal from which a stable DC power supply output voltage is generated independent of said AC input voltage, an igniter circuit in electrical communication with a control circuit for delivering a minimum activation voltage to said control circuit for a predetermined temporal duration sufficient for activation of said control circuit after which said temporal duration said power supply output voltage supplies said control circuit with said stable DC voltage.