Patent ID: 7710099

Claim:
A power control apparatus for automatically turning on or off a motherboard, comprising: a first connector for connecting to a power supply; a second connector for connecting to the motherboard; and a control circuit comprising: a timing chip, a power pin of the first connector connected to a voltage terminal and a reset terminal of the timing chip, and grounded via a first variable resistor, a second variable resistor and a first capacitor connected in series, a discharge terminal of the timing chip connected to a node between the first variable resistor and the second variable resistor, a trigger terminal and a threshold terminal both connected to a node between the second variable resistor and the first capacitor; a first switch element comprising a first terminal connected to a power pin of the first connector, a second terminal grounded, and a control terminal connected to an output terminal of the timing chip; and a second switch element comprising a first terminal connected to a power pin of the first connector, a second terminal connected to a power pin of the second connector corresponding to the first connector, a control terminal connected to the first terminal of the first switch element.