Electronic device, power supply device of electronic device, and power supply method
Various embodiments of the present disclosure relate to an electronic device including: a first battery for supplying power; an attachable/detachable power supply device including a second battery for supplying power and a DC power connector; and a processor connected to the first battery, and connected to the second battery and the DC power connector when connecting to the power supply device, wherein the power supply device includes at least two MOSFETs for connecting the second battery and an element, for detection of the power supply device, provided to the electronic device when connecting the power supply device. In addition, other examples, which can be identified through the specification, are possible.
1. A system including an electronic device and a power supply device, wherein the electronic device comprises:
a first battery;
a processor; and
a resistor,
wherein the power supply device comprises:
a second battery;
a connector exposed to outside when the power supply device is detached from the electronic device;
a DC power connector;
a first group of MOSFETs interposed between the connector and the second battery;
a second group of MOSFETs interposed between the connector and the DC power connector; and
a switch interposed between the connector and the DC power connector,
wherein when the power supply device is attached to the electronic device and the resistor is connected to the first group of MOSFETs, the first group of MOSFETs are switched to an ON state,
wherein when a DC power source is connected with the DC power connector, the processor is configured to transmit a control signal for turning on the switch such that the second group of MOSFETs are turned on in response to the turning on of the switch, and
wherein when the power supply device is detached to the electronic device, the first group of MOSFETs, the second group of MOSFETs, and the switch are turned off.
2. The system of claim 1 , wherein the power supply device is configured to supply power from the second battery to the electronic device through the first group of MOSFETs.
3. The system of claim 1 , wherein the processor is configured to determine that the DC power source is connected with the DC power connector when receiving a low signal as a third MOSFET is turned on.
4. The system of claim 1 , wherein the electronic device further comprises a power selection device configured to allow one of the first battery, the second battery, and the DC power connector to supply power to the electronic device, and
wherein the processor transmits a power selection signal to the power selection device such that the power selection device selectively opens or closes any one of a first path of transmitting power from the first battery and a second path of transmitting power from the second battery.
5. The system of claim 1 ,
wherein a DC power is supplied to the electronic device through the second group of MOSFETs when the switch is turned on.
6. The system of claim 4 , wherein the power selection device is configured to turn on/off at least one of a fourth MOSFET included in the first path and a fifth MOSFET included in the second path.
7. The system of claim 1 , wherein the processor is further configured to:
supply power to the electronic device firstly by the DC power, secondly by the second battery, and thirdly by the first battery.
8. The system of claim 1 , wherein the electronic device further comprises:
a charging circuit configured to charge the first battery and/or the second battery.