Dual input ac and dc power supply having a programmable dc output utilizing a secondary buck converter

A with double input (12 and 14) is double/alternating current power transformer (10), which is suitable for receiving the alternating and direct current input, and providing DC voltage capable of to output (16) and DC output (18). The pair of the input/alternating current power transformer (10) comprises a power transformer circuit (20); the circuit with a alternating current converter (22) and a DC to DC a boost converter (24) and feedback circuit (26) and filtering circuit (25) and a direct-current power to the DC voltage drop converter (28). The power transformer (10) is solved beneficially with the following fact and multiple management system questions: A from the AC or a DC power supply of the mobile application power supply, lower end are key are different interface device. Moreover, the power transformer (10) advantageously further comprises a dual output voltage column (16 and 18), containing relative to supply power to the power demand of different mobile device with single converter.