| 摘要 |
<P>PROBLEM TO BE SOLVED: To realize a load drive circuit with a bidirectional current detection function having a bidirectional current changeover switch. <P>SOLUTION: The load drive circuit with the bidirectional current detection function comprises: the bidirectional current changeover switch 1 where a first forward current flows in a direction from first wiring 5 toward second wiring 6 and a first reverse current flows in a direction from the second wiring 6 toward the first wiring 5; a forward current detection switch 2 into which a second forward current correlated with the first forward current flowing to the bidirectional current changeover switch 1 flows, a reverse current detection switch 3 into which a second reverse current correlated with the first reverse current flowing to the bidirectional current changeover switch 1 flows; a forward current detection circuit 10 connected with the forward current detection switch 2 for detecting the second forward current which has flowed out from the forward current detection switch 2; a reverse current detection circuit 11 connected with the reverse current detection switch 3 for detecting the second reverse current which has flowed out from the reverse current detection switch 3; and a switch control circuit 4. <P>COPYRIGHT: (C)2012,JPO&INPIT |
