Drive circuit of three-phase DC motor and electronic device using thereof

A drive circuit, which is a drive circuit of a three-phase DC motor, each phase of the drive circuit comprising:

• a bridge circuit, including a high-side transistor connected between a power supply terminal and an output terminal and a low-side transistor connected between the output terminal and a ground terminal;
• a pre-driver, driving the high-side transistor and the low-side transistor;
• a first transistor, connected between the output terminal and the ground terminal in a manner to form a regenerative path parallel to the low-side transistor;
• and
• a regenerative control circuit, in a regenerative state in which a current sinks from the output terminal, controlling a voltage of a control terminal of the first transistor in a manner that an output voltage of the output terminal approaches a target voltage higher than a power supply voltage of the power supply terminal by a first voltage width.