Semiconductor integrated circuit, semiconductor integrated circuit device, and motor-drive control system

A motor-drive control system comprising:

• a motor including an exciting coil that generates magnetic field by excitation current;
• and
• a semiconductor integrated circuit device that controls the excitation current, wherein
• the semiconductor integrated circuit device includes:
• a first switching element whose main current path is connected to a first output end and a power end therebetween, the first output end supplying excitation current to a first exciting coil of the motor;
• a second switching element whose main current path is connected to the first output end and a grounding end therebetween;
• a third switching element whose main current path is connected to a second output end and the power end therebetween, the second output end supplying excitation current to the first exciting coil;
• a fourth switching element whose main current path is connected to the second output end and the grounding end therebetween;
• a first mode set circuit that sets a drive mode of the first to fourth switching elements;
• and
• a first control circuit that generates, in accordance with the drive mode, drive signals for controlling turning ON/OFF of the first to fourth switching elements, and supplies the generated drive signals to the first to fourth switching elements, wherein
• the drive mode includes:
• a first discharge mode that turns ON the first switching element and the third switching element;
• and
• a second discharge mode that turns ON the second switching element and the fourth switching element.

A semiconductor integrated circuit device comprising:

• a first semiconductor chip arranged on a first principal surface of a die pad, the first semiconductor chip including:
• a first switching element whose main current path is connected to a first output end and a first power end therebetween, the first output end supplying excitation current to a first exciting coil of a motor;
• a second switching element whose main current path is connected to the first output end and a first grounding end therebetween;
• a third switching element whose main current path is connected to a second output end and the first power end therebetween, the second output end supplying excitation current to the first exciting coil;
• a fourth switching element whose main current path is connected to the second output end and the first grounding end therebetween;
• a first mode set circuit that sets a drive mode of the first to fourth switching elements;
• a first control circuit that generates, in accordance with the drive mode set by the first mode set circuit, drive signals for controlling turning ON/OFF of the first to fourth switching elements, and supplies the generated drive signals to the first to fourth switching elements;
• a first control signal end to which a control signal to be supplied to the first control circuit is applied;
• a first synchronous signal end to which a synchronous signal to be supplied to the first control circuit is applied;
• a first control signal pad to which the control signal to be supplied to the first control circuit is supplied from an outside;
• a first synchronous signal pad to which the synchronous signal to be supplied to the first control circuit is supplied from an outside;
• and
• a first function change circuit that changes a connection relation between the first control signal end and the first control signal pad, or a connection relation between the first control signal end and the first synchronous signal pad, and a connection relation between the first synchronous signal end and the first synchronous signal pad, or a connection relation between the first synchronous signal end and the first control signal pad;
• and
• a second semiconductor chip arranged on a second principal surface opposite to the first principal surface of the die pad, the second semiconductor chip including:
• a fifth switching element whose main current path is connected to a third output end and a second power end therebetween, the third output end supplying excitation current to the first exciting coil;
• a sixth switching element whose main current path is connected to the third output end and a second grounding end therebetween;
• a seventh switching element whose main current path is connected to a fourth output end and the second power end therebetween, the fourth output end supplying excitation current to the first exciting coil;
• an eighth switching element whose main current path is connected to the fourth output end and the second grounding end therebetween;
• a second mode set circuit that sets a drive mode of the fifth to eighth switching elements;
• a second control circuit that generates, in accordance with the drive mode set by the second mode set circuit, drive signals for controlling turning ON/OFF of the fifth to eighth switching elements, and supplies the generated drive signals to the fifth to eighth switching elements;
• a second control signal end to which the control signal to be supplied to the second control circuit is applied;
• a second synchronous signal end to which the synchronous signal to be supplied to the second control circuit is applied;
• a second control signal pad to which the control signal to be supplied to the second control circuit is supplied from an outside;
• a second synchronous signal pad to which the synchronous signal to be supplied to the second control circuit is supplied from an outside;
• and
• a second function change circuit that changes a connection relation between the second control signal end and the second control signal pad, or a connection relation between the second control signal end and the second synchronous signal pad, and a connection relation between the second synchronous signal end and the second synchronous signal pad, or a connection relation between the second synchronous signal end and the second control signal pad.