| 摘要 |
PROBLEM TO BE SOLVED: To provide a power supply device switchable for a plurality of apparatuses and capable of controlling an output voltage value and available output current capacity (MAX value), and an AC adapter, electronic apparatus, and power supply system that mount the power supply device.SOLUTION: A power supply device 4 comprises: a DC/DC converter 13 disposed between input and output; a primary side controller 30 for controlling input current of the DC/DC converter; a signal conversion circuit 25 that is connected to a plurality of control inputs and switches control input signals of the plurality of control inputs; and a secondary side controller 16 that is connected to the signal conversion circuit, receives a control input signal switched by the signal conversion circuit, and feeds back the signal to the primary side controller. The primary side controller, on the basis of the control input signal fed back from the secondary side controller, makes an output voltage value and available output current capacity (MAX value) of the DC/DC converter be variable. |
