Patent ID: 6724163
Filing Date: 2004-04-20
Classification: H02P

Abstract:
A single-chip integrated controller for controlling a DC motor having permanent magnet rotor driven by a pair of coils, the integrated controller comprising:a magnetic field sensing device that detects a relative position of the rotor magnet of the DC motor; a drive circuit, coupled to the sensing device, configured to control the voltage provided to the coils based on the output of the sensing device, said drive circuit having two output terminals for connecting to the coils and a ground terminal for connecting to ground; and a voltage regulator coupled to the sensing device and the drive circuit, for supplying a stabilized voltage to the sensing device; wherein the drive circuit controls the voltage at the output terminals so as to operate the coils in anti-phase and so as to rotate the rotor, and wherein the drive circuit operates to electrically couple and discouple in anti-phase each output terminal with the voltage regulator, wherein the drive circuit each output terminal with the voltage regulator when the voltage at the respective terminal is high, and such that the voltage regulator is able to supply a stabilized voltage to the sensing device and the drive circuit.