| 摘要 |
A method for driving a switch in a power factor correction circuit comprises the step of generating a switch-on level of a drive signal of the switch for a switch-on duration dependent on a control signal, and the step of generating a switch-off level of the drive signal after the switch-on time has elapsed. The method further comprises the step of detecting a predetermined storage state of an inductive energy storage element after the switch-on duration has elapsed. In addition, the method comprises waiting until the end of a waiting duration, which is at least approximately proportional to the time duration between the beginning of the switch-on level and the detection of the predetermined storage state, before a renewed generation of a switch-on level, the waiting duration being dependent on the control signal. A drive circuit is also disclosed for providing a drive signal according to the method.
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