| 摘要 |
A load drive device is provided for outputting a control signal to a driving transistor and for driving a load by switching, the driving transistor and the load being connected in series between a direct current power source and ground. The load drive device includes a reverse connection protection unit which is provided in a line leading from a negative side of the direct current power source, and which blocks a current flowing therethrough when the direct current power source is connected in reverse. A failure detection is performed by a failure detection process by monitoring a change of a current flowing via the reverse connection protection unit during the driving transistor is in a conduction state.
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