Motor driver having automatic release protection mechanism and motor driving method thereof

A motor driver having an automatic release protection mechanism, comprising:

• an output stage circuit, including a plurality of circuit switches, each of the plurality of circuit switches comprising:
• a high-side switch, wherein a first terminal of the high-side switch is coupled to an input voltage;
• and
• a low-side switch, wherein a first terminal of the low-side switch is connected to a second terminal of the high-side switch, a second terminal of the low-side switch is grounded, and a node between the second terminal of the low-side switch and the first terminal of the high-side switch is connected to one terminal of a motor;
• a motor driving circuit, connected to control terminals of the high-side switches and control terminals of the low-side switches, and configured to perform a protection process in which at least one of the low-side switches in the plurality of circuit switches is turned off;
• and
• a rotational speed detector circuit, connected to the motor driving circuit, and configured to detect a rotational speed of the motor at a plurality of detection time points as a plurality of detected rotational speeds;
• wherein the motor driving circuit is configured to control or modulate an ending time point and a time duration of the protection process based on the plurality of detected rotational speeds.