Patent ID: 8014182

Claim:
A power supply device of controlling feedback synchronization, and the power supply device being connected to an electric power source for obtaining an input power, and including a first converter and a second converter for modulating the input power, and a boost timing being started for boosting the obtained input power to produce and transmit a first output power and a second output power to a first output terminal and a second output terminal respectively, after the first converter and the second converter are turned on, and the power supply device further comprising: a feedback synchronization unit, electrically coupled to the first and second converters, and coupled to the first output terminal and the second output terminal for obtaining a first feedback signal and a second feedback signal respectively, and producing and transmitting a synchronous feedback signal to the second converter according to a voltage difference of the first feedback signal and the second feedback signal, such that a voltage level for driving the second converter to modulate the second output power in a boost period is synchronous with the first output power.