Patent ID: 9729046
Date: 2017-08-08
CPC Classifications: H02M

Claim:
1. A power supply apparatus comprising: an input terminal at which an input voltage is received; an output terminal at which an output voltage is outputted; a first switch coupled between said input and output terminals, and operable between an ON state and an OFF state based on a first control signal, wherein when said first switch operates in the ON state, the input voltage is outputted through said first switch to serve as the output voltage; a converting module coupled between said input and output terminals, and selectively converting the input voltage into the output voltage based on a second control signal; and a control module coupled to said input and output terminals, said first switch and said converting module, and generating the first and second control signals based at least on the input and output voltages; said power supply apparatus being operable in at least a first mode, where the first control signal is such that said first switch operates in the ON state, and where the second control signal is such that said converting module does not perform the conversion, and a second mode, where the first control signal is such that said first switch operates in the OFF state, and where the second control signal is generated based on the output voltage in such a way that said converting module performs the conversion and that the output voltage is stabilized at a predetermined target voltage value; when said power supply apparatus operates in the second mode and a first condition associated with the input voltage is met, said control module generating the first control signal in such a way that said first switch operates in the OFF state, and generating the second control signal in such a way that said converting module performs the conversion and that the output voltage gradually changes toward the input voltage.