BD63430EFV is a Unipolar Stepping Motor driver. Rated power supply voltage of the device is 50 V, and rated output current is 3 A. CLK-IN driving mode is adopted for input interface, and excitation mode is corresponding to FULL STEP mode, HALF STEP mode, QUARTER STEP mode, Eighth step mode and Sixteenth step mode via a built-in DAC. In addition, the power supply may be driven by one single system, which simplifies the design. There are built in protection circuits in this IC. It is possible to output an abnormal detection signal that notifies each protection circuit operation, which contributes to set high reliability.