Power supply device and control method thereof

Abstract

A control method for a power supply device includes: outputting a first signal to a first number of first switches via a controller to disconnect the first switches; determining, according to power parameters, the power supply sequence of a second number of second input terminals via the controller; outputting a second signal to a priority switch via the controller, wherein the priority switch is coupled to a priority input terminal in the power supply sequence of the second input terminals to turn on the priority switch so that the priority input terminal supplies power to the output terminal; and outputting the first signal to the remaining switches in the second switches via the controller to disconnect the remaining switches.

Claims

1. A control method for a power supply device, wherein the power supply device includes a controller, a plurality of input terminals, at least one output terminal, and a plurality of switches, wherein the switches are coupled between the controller, the input terminals, and the at least one output terminal, wherein the control method includes: The controller outputs a plurality of first signals to a first number of a plurality of first switches to disconnect the first switches, wherein the voltage of the first number of a plurality of first input terminals coupled to the first switches is less than a specific value; the controller determines a power supply sequence of a second number of a plurality of second input terminals based on a plurality of power supply parameters, wherein the voltage of the second input terminals is greater than or equal to the specific value, wherein the second input terminals are coupled to the second number of a plurality of second switches; the controller outputs a second signal to a priority switch, wherein the priority switch is coupled to a priority input terminal corresponding to the power supply sequence among the second input terminals to turn on the priority switch, thereby enabling the priority input terminal to supply power to at least one output terminal; and the controller outputs the first signals to at least one other switch among the second switches to disconnect the at least one other switch.

2. The control method as described in claim 1, further comprising: The controller detects whether the voltages at the input terminals are greater than or equal to a specific value.

3. The control method as described in claim 1, further comprising: A battery management circuit detects a state of charge of a battery and outputs a charge signal to the controller based on the state of charge. And the controller determines a charge result based on the charge signal.

4. The control method as described in claim 3, further comprising: When the charge result is that the state of charge is greater than or equal to a certain proportion, the controller outputs the second signal to a third switch to turn on the third switch, wherein the third switch is coupled between the controller, the battery, and the at least one output terminal; in response to the third switch being turned on, the battery supplies power to the at least one output terminal; and the controller outputs the first signals to the switches to turn off the switches.

5. The control method as described in claim 4, further comprising: When the state of charge is less than the specified ratio, the controller outputs the first signal to the third switch to disconnect the third switch.

6. The control method as described in claim 1, further comprising: A step-down voltage is generated by stepping down the voltage of the priority input terminal through a step-down circuit coupled between the switches and the controller. And the step-down voltage is provided to the controller through the step-down circuit to start the controller.

7. The control method as described in claim 1, further comprising: A boost voltage is generated by boosting the voltage of the priority input terminal through a boost circuit coupled between the switches and the at least one output terminal; And the boost voltage is provided to the output terminal through the boost circuit.

8. A power supply device, comprising: Multiple input terminals; At least one output terminal; A plurality of switches are coupled between the input terminals and the at least one output terminal; The controller, coupled to the input terminals, is configured to: detect whether a plurality of voltages at the input terminals are greater than or equal to a specific value; output a plurality of first signals to a first number of a plurality of first switches among the switches to disconnect the first switches, wherein the first number of the plurality of first input terminals are coupled to the first switches and the voltages at the first input terminals are less than the specific value; determine a power supply sequence for a second number of a plurality of second input terminals among the input terminals based on a plurality of power supply parameters, wherein the voltages at the second input terminals are greater than or equal to the specific value, wherein the second input terminals are coupled to the second number of the plurality of second switches among the switches; output a second signal to a priority switch, wherein the priority switch is coupled to a priority input terminal among the second input terminals corresponding to the power supply sequence to turn on the priority switch, thereby enabling the priority input terminal to supply power to at least one output terminal; and output the first signals to at least one other switch among the second switches to disconnect the at least one other switch.

9. The power supply device as claimed in claim 8, wherein the power parameters include one of power factor, start-up time, and hold-up time.

10. The power supply device as described in claim 8, further comprising: A battery management circuit, coupled to the input terminals, the controller, and a battery, is used to: detect a state of charge of the battery and output a charge signal to the controller based on the state of charge, so that the controller determines a charge result based on the charge signal; wherein, when the charge result is that the state of charge is greater than or equal to a certain proportion, the battery supplies power to at least one output terminal.

Images