| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a load drive system for protecting against reverse connection of a direct current power source and easily detecting a load current. <P>SOLUTION: An FET 22 is inserted in a power source line of negative side. The FET 22 is switched on when a motor 9 is driven and including a current detection terminal 22a which divides the current while the FET 22 is in the ON state. A control protection unit 24 switches off the FET 22 when the control protection unit 24 detects that the battery 1 is connected in reverse. While the FET 10 is in the ON state, the control protection unit 24 performs a failure detection process by monitoring the change of the current flowing through the current detection terminal 22a. <P>COPYRIGHT: (C)2009,JPO&INPIT |
