| 摘要 |
<p>The present invention relates to a circuit for driving a power switch, a power supply apparatus, and a method for driving a power switch. According to an embodiment of the present invention, provided is a circuit for driving a power switch, which includes: a variable oscillator whose frequency varies according to a change in a primary side input voltage to output a reference signal for duty control; and a duty control unit which receives a feedback signal fed back from a secondary side output signal and the reference signal for duty control from the variable oscillator and outputs a duty control signal for driving the power switch. Further, a power supply apparatus and a method for driving the power switch are provided. According to embodiments of present invention, it is possible to improve a switching loss by changing a frequency of the reference signal for duty control of the power switch according to the input voltage.</p> |
