| 摘要 |
A power supply device includes a battery, a charging part charging the battery, a power input to receive adapter power from an adapter supplied with external power or power output from a similarly configured power supply device, a power output part to output the adapter power, the power output of a similarly configured power supply device, or the battery power of the battery, and a controller to control the input power to apply power to the charging part and the power output part when the input power is supplied to the power input part, and to control the battery to apply power to the power output part when the input power is not supplied to the power input part. Thus, the power supply device is capable of applying power from an adapter to a portable electronic device while charging an internal battery with the adapter power. |
| 主权项 |
1. A system comprising:
a portable electronic device including:
a system unit,an internal power supply unit including a first rechargeable battery and supplying an operating power to the system unit, anda first power input part to receive electrical power from an external source; an AC adapter to convert AC power from an electrical outlet into an adapter power of a first voltage level, the AC adapter including an adapter connecting terminal through which the adapter power is supplied; and an external power supply device including a second rechargeable battery of a second voltage level which is lower than the first voltage level, connectable between the AC adapter and the portable electronic device, the external power supply device including:
a second power input part connectable to receive the adapter power from the AC adapter,a charging part to charge the second rechargeable battery using the adapter power from the AC adapter,a power output part,a controller to control an amount of the adapter power applied to the charging part and the power output part, when the second power input part is connected to receive the adapter power from the AC adapter, anda voltage regulator coupled between the controller and the power output part;wherein, when no power is received by the second power input part of the external power supply device, the voltage regulator of the external power supply device receives battery power supplied from the second rechargeable battery and increases the second voltage level of the received battery power, which is supplied to the power output part of the external power supply device, to the first voltage level of the adapter power, wherein the portable electronic device is connectable to receive power from either one of the AC adapter and the external power supply device. |
