Patent ID: 8624640
Filing Date: 2014-01-07
Classification: H03K

Abstract:
1. An inductive load driving device comprising: a first switching element coupled between an output terminal of a power circuit and one end of an inductive load; a second switching element coupled between another end of the inductive load and a ground terminal; a counter current regeneration circuit configured to supply to the output terminal of the power circuit, a counter current output from the another end of the inductive load when the first and second switching elements are in off-state; and a circuit element protection circuit configured to electrically couple the output terminal of the power circuit to a control terminal of the second switching element and turn on the second switching element when a value of the output voltage of the power circuit becomes equal to or more than a threshold value; wherein the circuit element protection circuit comprises: a determination circuit configured to determine whether or not the value of the output voltage of the power circuit becomes equal to or more than the threshold value by comparing a value of a divided voltage of the output voltage of the power circuit and a value of a divided voltage of a reference voltage; and a conduction circuit configured to electrically couple the output terminal of the power circuit to the control terminal of the second switching element when the determination circuit determines that the value of the output voltage of the power circuit becomes equal to or more than the threshold value.