Abstract: A power supply device includes a first voltage conversion unit and a second voltage conversion unit. The first voltage conversion unit performs a step-down operation according to a first voltage to output a first output voltage via a first connection interface. The second voltage conversion unit includes a first rectifying circuit and a power delivery circuit. The first rectifying circuit performs a first rectifying operation based on load information of a load and the first voltage to generate a second voltage. The power delivery circuit determines, according to the load information and the second voltage, whether to output the second voltage as a second output voltage to the load via a second connection interface. The first connection interface is different from the second connection interface, and the second output voltage is higher than or equal to the first output voltage.

Abstract: A power supply device includes a first voltage conversion unit and a second voltage conversion unit. The first voltage conversion unit performs a step-down operation according to a first voltage to output a first output voltage via a first connection interface. The second voltage conversion unit includes a first rectifying circuit and a power delivery circuit. The first rectifying circuit performs a first rectifying operation based on load information of a load and the first voltage to generate a second voltage. The power delivery circuit determines, according to the load information and the second voltage, whether to output the second voltage as a second output voltage to the load via a second connection interface. The first connection interface is different from the second connection interface, and the second output voltage is higher than or equal to the first output voltage.

Abstract: A power convertor includes a transformer, a filtering unit, an isolating unit, a starting unit, a rectifier, an accelerating capacitor, a controlling module and an auxiliary capacitor. The filtering unit is electrically connected to the transformer and the isolating unit. The accelerating capacitor is electrically connected to the rectifier and the isolating unit. The starting unit is electrically connected to the rectifier, the isolating unit, the accelerating capacitor, the controlling module and the auxiliary capacitor. The power convertor is shut down when the controlling module enters a latch mode. The isolating unit is configured to prevent an electric power stored in the filtering unit from entering the starting unit when the controlling module leaves the latch mode. The accelerating capacitor obtains a voltage level and rapidly charges to the auxiliary capacitor to make the power convertor restart when the controlling module leaves the latch mode and resets.