NOVELTY - An automatic charging and power management device comprises a charging control unit (10) having a power input terminal (11), a power output terminal (12), and a charging operation actuation terminal (13); and power switching control unit(s) (20) comprising power input terminal(s) (21), a charging control terminal (22), a charging voltage terminal (23), a system actuation switch (24), a system actuation terminal (25), a power type terminal (26), and power output terminal(s) (27).    USE - Automatic charging and power management device for use in portable direct current power supply and battery charging device. Uses include but are not limited to portable disk drives, mobile phones, notebook computers, and personal data assistants.    ADVANTAGE - Automatic charging and power management device detects type of input power source and status of system power supply.    DETAILED DESCRIPTION - An automatic charging and power management device comprises a charging control unit (10) having a power input terminal (11), a power output terminal (12), and a charging operation actuation terminal (13); and power switching control unit(s) (20) comprising power input terminal(s) (21), a charging control terminal (22), a charging voltage terminal (23), a system actuation switch (24), a system actuation terminal (25), a power type terminal (26), and power output terminal(s) (27). The power input terminal is connectable to an input power source. The power output terminal is connectable to a rechargeable battery to perform charging operation to the rechargeable battery. The power input terminal is connectable to the input power source. The charging control terminal is connectable to the charging operation actuation terminal of the charging control unit to control actuation of charging operation of the charging control unit. The charging voltage terminal is connectable to the rechargeable battery that is connected to the charging control unit to receive a status of the rechargeable battery. The system actuation switch is triggerable to generate a system actuation signal to the system actuation terminal. The power type terminal is connectable to the input power source to generate an identification signal in accordance with type of the input power source. The power output terminal supplies an output power from the power switching control unit. The charging control unit is switched between a charging function for charging the rechargeable battery and a power supplying condition for supplying power for power output at the power output terminal on the basis of status of the power input terminal, the system actuation terminal, the power type terminal, and the charging voltage terminal.    DESCRIPTION OF DRAWING(S) - The drawing shows a system block diagram of an automatic charging and power management device.    Charging control unit (10)    Power input terminal (11)    Power output terminal (12)    Charging operation actuation terminal (13)    Power switching control unit (20)    Power input terminal (21)    Charging control terminal (22)    Charging voltage terminal (23)    System actuation switch (24)    System actuation terminal (25)    Power type terminal (26)    Power output terminal (27)