| CPC H02J 7/0031 (2013.01) [H02J 7/0068 (2013.01)] | 15 Claims |
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1. An automatic power-off circuit, coupled between a battery and a load, and configured to automatically disconnect a path between the battery and the load after the battery supplying power to the load for a specific time period, the automatic power-off circuit comprising:
a first switch, coupled to the battery and the load;
a reverse circuit, comprising an input end coupled to the battery, the switch, and a first capacitor, and an output end coupled to a timing circuit, and the first reverse circuit configured to provide a first signal reversed to a potential change based on the potential change of the first capacitor;
a logic circuit, comprising an input end coupled to the timing circuit, and an output end coupled to the first switch and the reverse circuit; and
a second switch, comprising a first end coupled to the input end of the reverse circuit, and a second end coupled to a second capacitor, and the second switch be turned on based on a trigger, and a potential of the second capacitor being changed based on the second switch turned-on;
wherein the timing circuit is configured to provide a second signal with a first potential to the logic circuit based on the first signal with the first potential, and the timing circuit adjusts the second signal with the second potential after the specific time period, and the logic circuit is configured to turn on the first switch based on the second signal with the first potential and turn off the first switch based on the second signal with the second potential.
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