Motor drive controller and method for operating the same

A method of operating a motor drive controller comprising:

• a difference control section, a driver output section, a drive current detection amplifier, and a load short-circuit detection circuit,
• wherein a motor and sensing resistor coupled in series can be coupled to an output terminal of the driver output section,
• wherein the difference control section generates a drive voltage command signal in response to a drive current command value and a drive current detection signal, and supplies the same to an input terminal of the driver output section,
• wherein the driver output section generates a drive output signal for driving the motor and sensing resistor coupled in series, in response to the drive voltage command signal generated from the difference control section,
• wherein the drive current detection amplifier generates the drive current detection signal fed back to the difference control section, in response to a drive current flowing through the sensing resistor,
• wherein an input terminal of the load short-circuit detection circuit is coupled to one of circuit nodes in a feedback loop including the difference control section, the driver output section, the motor and sensing resistor coupled in series, and the drive current detection amplifier, and
• wherein the load short-circuit detection circuit detects an abnormal oscillation waveform signal generated at the one of circuit nodes caused by a short-circuit state between both ends of the motor.