Start-up circuit and power device using the same

A power device, comprising:

• a power generating unit configured to generate a predetermined voltage under the control of an integrated circuit (IC) controller;
• a start-up circuit configured to supply the predetermined voltage to the IC controller;
• and
• a feedback unit configured to supply a voltage generated by the power generating unit to the start-up circuit, to correct the predetermined voltage to enable the power generating unit to stably generate a voltage,
• wherein the start-up circuit includes:
• a bias unit configured to allow a first current to flow from a first power source through the bias unit to a second power source, according to the predetermined voltage;
• a first start unit configured to drive a second current to apply the predetermined voltage to the bias unit, and configured to stop driving the second current when a voltage received from the second power source reaches a first voltage;
• and
• a second start unit configured to drive a third current to apply the predetermined voltage to the bias unit, and configured to stop driving the third current upon receiving a stop signal,
• wherein the first start unit comprises:
• a second resistor, and a second transistor,
• wherein one end of the second resistor is connected to a gate electrode of a first transistor, and
• wherein a first electrode of the second transistor is connected to the other end of the second resistor, a second electrode of the second transistor is connected to a ground, and a gate electrode of the second transistor is connected to the second power source.