Patent attributes
A PWM motor drive circuit includes a drive IC member, a PWM converter circuit and a potential limiter. The drive IC member electrically connects with a motor coil and further includes a pin electrically connected with the PWM converter circuit. The potential limiter has a first terminal electrically connected with a point between the pin of the drive IC member and the PWM converter circuit, and a second terminal electrically connected with a power source to supply an initial voltage to the pin of the drive IC member via the potential limiter. When the motor starts, the potential limiter can adjust of the initial voltage supplying to the pin of the drive IC member so that the drive IC member cannot unexpectedly enter a stop or high-speed mode.
