To provide an actuator driving device that highly accurately detects the voltage across actuator while detecting disconnection of the actuator.
A switching element 5 is connected with a motor 11 and a connection point thereof is connected with a reference power supply 14 via resistors 7, 8, respectively. Potential between the resistors 7, 8 is inputted to a CPU 2 as a first voltage monitor value. A switching element 6 is connected with the motor 11 and a connection point thereof is connected with the reference power supply 14 via resistors 9, 10, respectively. Potential between the resistors 9, 10 is inputted to the CPU 2 as a second voltage monitor value. The CPU 2 can highly accurately detect the voltage across motor 11 while detecting whether or not a disconnection failure occurs in any one of regions A-C on the basis of the first/second voltage monitor values V1, V2 showing the voltage across motor 11 even when the motor 11 is operated.
WATANABE YOSHIHIRO
Takahiro Miura
Fumihiro Mizuno