| 摘要 |
A coil load drive circuit drives an end of a coil load through an output terminal at the midpoint between a power supply side drive transistor and a ground side drive transistor provided in series between a power supply voltage and a ground potential, and turns off any of the drive transistors when an overcurrent flows therethrough. The coil load drive circuit includes an overcurrent detection transistor receiving a control voltage of the power supply side drive transistor or a control voltage of the ground side drive transistor, a constant current source supplying a constant current to the overcurrent detection transistor to generate a reference voltage, and an overcurrent detection comparator comparing a voltage of the output terminal with the reference voltage to detect an overcurrent.
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