| 摘要 |
A power control circuit includes an electronic switch ( 20 ) interposed between a power unit ( 10 ) and an electronic device ( 30 ), a driving circuit ( 40 ) and a mechanical switch ( 50 ). The driving circuit receives a power-on signal from the mechanical switch, and signals the electronic switch to turn on and supply power to the electronic device in accordance with the power-on signal. The electronic device controls the driving circuit to maintain the electronic switch to be on and continue the power supply to the electronic device. The electronic device further receives a power-off signal from the mechanical switch, and signals the driving circuit to turn off the electronic switch and discontinues the power supply to the electronic device.
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