Multi-input power system configured to receive at least two input power sources

A multi-input power system, configured to receive at least two input power sources, wherein each input power source is an AC power source, the multi-input power system comprising:

• at least two filter-rectification circuits configured to correspondingly receive the at least two input power sources, and convert the at least two input power sources into at least two rectified voltages;
• at least two boost power factor correction circuits configured to correspondingly receive the at least two rectified voltages, and perform a power factor correction to the rectified voltages to provide a conversion voltage, wherein each boost power factor correction circuit comprises:
• an inductor comprising a first terminal and a second terminal;
• a switch comprising a first power terminal, a second power terminal, and a control terminal;
• a diode comprising an anode and a cathode;
• a voltage-dividing circuit configured to receive the conversion voltage outputted from the boost power factor correction circuit, and divide the conversion voltage to acquire a divided voltage;
• a resistance adjustment circuit connected to the voltage-dividing circuit;
• and
• a controller configured to receive the divided voltage, and control a turned-on time and/or a turned-off time of the switch according to the divided voltage so as to control the conversion voltage, wherein the first terminal of the inductor is connected to the filter-rectification circuit, and the second terminal of the inductor is connected to the first power terminal of the switch and the anode of the diode;
• the cathode of the diode is connected to the DC-to-DC conversion circuit;
• the second power terminal of the switch is grounded;
• a DC-to-DC conversion circuit connected to the at least two boost power factor correction circuits, and the DC-to-DC conversion circuit configured to convert the conversion voltage into an output voltage;
• and
• a control circuit configured to receive at least two power information corresponding to the at least two input power sources, and determine at least two power supply status of the at least two input power sources according to the at least two power information to generate at least two control signals,
• wherein the at least two control signals are configured to correspondingly control the at least two boost power factor correction circuits to control the magnitude of the conversion voltage.