Abstract: The present application provides a control circuit of a switching power supply, the control circuit comprising: a central control circuit which has a first control port, a second control port, and a third control port; and a current selection circuit which is disposed between the third control port and a ground and has two or more selection terminals, a connection state between the selection terminals being switched between different connection states to adjust the output current value of the switching power supply, wherein the different connection states include disconnection, shorting, and connection with a resistor having a predetermined resistance value. According to the present application, the output current value of the switching power supply is adjusted by switching the connection state between the selection terminals between the states of disconnection, shorting, and connection with a resistor having a predetermined resistance value.

Abstract: An embodiment of the present application provides a voltage conversion device configured to convert an inputted alternating voltage into a direct voltage or current, the voltage conversion device including at least a first voltage connector and a second voltage connector, where the alternating voltage is fed to the voltage conversion device via either the first voltage connector or the second voltage connector, the voltage conversion device further including: an electromagnetic filter unit; a conversion unit; a determination unit configured to determine which one of the first voltage connector and the second voltage connector is used to feed the alternating voltage into the voltage conversion device; a control unit controlling the conversion unit based on a determination result of the determination unit such that the direct voltage or current outputted by the conversion unit corresponds to the determination result, wherein the determination unit is electrically connected the first voltage connector and the se

Abstract: An embodiment of the present application provides a voltage conversion device configured to convert an inputted alternating voltage into a direct voltage or current, the voltage conversion device including at least a first voltage connector and a second voltage connector, where the alternating voltage is fed to the voltage conversion device via either the first voltage connector or the second voltage connector, the voltage conversion device further including: an electromagnetic filter unit; a conversion unit; a determination unit configured to determine which one of the first voltage connector and the second voltage connector is used to feed the alternating voltage into the voltage conversion device; a control unit controlling the conversion unit based on a determination result of the determination unit such that the direct voltage or current outputted by the conversion unit corresponds to the determination result, wherein the determination unit is electrically connected the first voltage connector and the se

Abstract: The present application provides a control circuit of a switching power supply, the control circuit comprising: a central control circuit which has a first control port, a second control port, and a third control port; and a current selection circuit which is disposed between the third control port and a ground and has two or more selection terminals, a connection state between the selection terminals being switched between different connection states to adjust the output current value of the switching power supply, wherein the different connection states include disconnection, shorting, and connection with a resistor having a predetermined resistance value. According to the present application, the output current value of the switching power supply is adjusted by switching the connection state between the selection terminals between the states of disconnection, shorting, and connection with a resistor having a predetermined resistance value.