Patent ID: 8144485
Filing Date: 2012-03-27
Classification: H02M

Abstract:
1. A direct current voltage conversion circuit comprising: a power supply; a first output; a second output; a transformer comprising a primary coil and a secondary coil; a first voltage-regulating circuit comprising: a second voltage-regulating circuit, wherein the power supply is configured to provide a second voltage to the second output via the transformer and the second voltage-regulating circuit in series, the second voltage-regulating circuit comprises a second diode, the primary coil of the transformer and the second diode is connected in series between the power supply and the second output; and a step-up DC-DC converter configured to receive a first feedback voltage from the first output and regulate a first voltage of the first output by turning on or turning off the transistor according to the first feedback voltage, and further configured to receive a second feedback voltage from the second output and regulate the second voltage of the second output according to the second feedback voltage.