| 摘要 |
When a switch ( 20 ) that is in series with the inductive load ( 10 ) is turned on, the rise behavior of the current (I) is first of all detected until a nominal value (Iref) is reached, and a pulse duty factor (Te/Ta) of a pulse width modulator device ( 30 ) is determined from said rise behavior. Immediately after the nominal value (Iref) of the current (I) has been reached, the switch ( 20 ) is driven in a conventional manner by the pulse width modulator device ( 30 ), using the pulse duty factor (Te/Ta) that has been determined, in order to finely adjust the pulse duty factor (Te/Ta). The invention largely avoids overshoots during control and the adjustment time is thus considerably shorter than in conventional drive circuits.
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