Inductive load driving circuit

Abstract

An inductive load driving circuit, formed in an integrated circuit device, includes first, second, third, and fourth switching transistors, and a guardring. The first switching transistor is connected between a first power supply potential point and a first output terminal. The second switching transistor is connected between the first power supply potential point and a second output terminal. The third switching transistor is connected between the first output terminal and a second power supply potential point. The fourth switching transistor is connected between the second output terminal and the second power supply potential point. One of the third switching transistor and the fourth switching transistor is turned on or off depending on a power supply direction in which power is supplied to an inductive load connected between the first output terminal and the second output terminal. The first switching transistor or the second switching transistor is controllably turned on and off, to thereby supply an adjusted power in a forward direction or in an inverse direction to the inductive load. The guardring of an N-type semiconductor region is connected to the second power supply potential point.