Patent ID: 6300736
Filing Date: 2001-10-09
Classification: H02P

Abstract:
A single-chip integrated controller for controlling a DC motor having a permanent magnet rotor driven by a pair of coils, the integrated controller comprising:a magnetic sensing device that detects a relative position of the rotor magnet of the DC motor;first and second power transistors for driving the motor coils, wherein an output terminal of each power transistor is coupled to one of the motor coils;a control circuit, coupled to the magnetic sensing device, that controls the power transistors to switch on and off based on the output of the magnetic sensing device;a voltage regulator for supplying a stabilized voltage to the magnetic sensing device and the control circuit; anda switching circuit coupling the control circuit to the power transistors and coupling the voltage regulator to the output terminals;wherein the control circuit controls the switching circuit to switch each power transistor on and off so as to rotate the rotor, and wherein the control circuit controls the switching circuit to connect and disconnect a voltage at each output terminal with the voltage regulator such that the voltage regulator supplies a stabilized voltage to the magnetic sensing device and the control circuit.