An inductive load drive device

摘要

An inductive load drive device is disclosed comprising: a monitor circuit that inputs the drive-side terminal voltage of an inductive load (ZL) and, when a drive current of the inductive load (ZL) is cut off or rapidly decreased, outputs an operation confirmation signal by detecting a surge current generated by self-induction of the inductive load (ZL), wherein the monitor circuit outputs a confirmation signal that detects a surge produced when a large current flowing in the load due to high voltage applied in an initial period of drive of the load (ZL) is rapidly decreased, wherein in order to prevent confusion of the surge with a surge produced when the load drive is terminated, the operating confirmation signal is masked by using a control signal indicative of the termination of drive of the inductive load.