| 摘要 |
A power saving device includes a first switch coupled between an input node and an output node, wherein the input node is coupled to a power source and the output node is coupled to an electronic device, a detection unit detecting the magnitude of a current, a charge unit coupled to the output node, wherein the charge unit correspondingly generates a detection signal in response to magnitude of the current, a battery pack coupled to the charge unit, a second switch disposed between the output node and the battery pack and a controller. When magnitude of the current in response to the detection signal is lower than a threshold current and battery capacity of the battery back is higher than a predetermined capacity, the controller outputs a set of control signals to turn off the first switch and turn on the second switch. |
| 主权项 |
1. A power saving device, comprising:
a first switch, coupled between an input node and an output node, wherein the input node is coupled to a power source and the output node is coupled to an electronic device; a detection unit, detecting the magnitude of a current which is supplied from the power source and flows between the input node and the output node; a charge unit, coupled to the output node, wherein the charge unit correspondingly generates a detection signal according to magnitude of the current detected by the detection unit; a battery pack, coupled to a charge output terminal of the charge unit; a second switch, disposed between the output node and the battery pack; and a controller, coupled to the charge unit and the battery pack for receiving the detection signal and detecting battery capacity of the battery pack respectively; when magnitude of the current in response to the detection signal is lower than a threshold current and battery capacity of the battery pack is higher than a predetermined capacity, the controller outputs a set of control signals to respectively turn off the first switch and turn on the second switch. |
