| 摘要 |
For the purpose of power factor correction, an inductor (7) is supplied with an input voltage (Vin), a controllable switch element (13) coupled with the inductor (7) being opened or closed to optionally charge or discharge the inductor (7). The switch element (13) is controlled depending on the detection of a zero crossing of the current through the inductor (7). If no such zero crossing is detected, the switch element (13) is controlled to carry out a charge or discharge process at least after expiry of a restart interval (Trestart), the restart interval being variable and being adapted to the respective internal mode of the power factor correction circuit (2). |
