Current controller and operating unit

PURPOSE:To provide an inexpensive, downsized load current controller in which number of components is reduced regardless of the type of motor load. CONSTITUTION:The current controller comprises a current control operating section 101, a PWM generating circuit 102, a dead time generating circuit 103, an overcurrent protective circuit 105, a current detecting circuit 106, and an encoder processing circuit 107, all of which are placed on one semiconductor substrate. Since the current controller can be employed in various types of motor load, mass productivity is enhanced and cost reduction is realized.