| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a load drive device capable of suppressing generation of the ripple of a current in a more flexible manner, when a plurality of inductive loads are actuated under PWM control. <P>SOLUTION: A motor controlling unit 1 includes a synchronous signal input terminal IN to which the synchronous signal is input from outside, and a synchronous signal output terminal OUT from which the synchronous signal is output to outside. When a PWM signal is output to an FET 3, the control logic 5 outputs the synchronous signal from the output terminal OUT to prevent the switching period (turn-on, turn-off period) of the PWM signal in the motor controlling unit 1 from overlapping the switching period of the PWM signal in another motor controlling unit 1, when no synchronous signal is input through the input terminal IN. Further, the PWM signal is generated to be output to the FET 3 in the control logic 5 on the basis of the synchronous signal, when it is input from outside through the input terminal IN. <P>COPYRIGHT: (C)2010,JPO&INPIT |
