Patent ID: 6134125
Filing Date: 2000-10-17
Classification: H02M

Abstract:
An AC and DC input power supply comprising:an AC power supply circuit, and further comprisingan AC input for receiving a range of AC input voltages;a rectifier circuit connected to the AC input;an isolation output transformer having first and second primary winding terminals, and a low voltage winding section for connecting to a DC voltage input that is lower than the range of the DC bulk voltage that is rectified from the range of AC input voltage, wherein said rectifier circuit is connected to the first primary winding terminal of said isolation output transformer;a transistor connected to the second primary winding terminal of the isolation output transformer; anda DC power supply circuit, and further comprisingsaid DC input that is selectably connectable between the first primary winding terminal when the voltage input to the DC input connector is a nominal DC voltage that is within the range of the DC bulk voltage and the low voltage winding section when the voltage input to the DC input is lower than the range of the DC bulk voltage.