IC Module SI-7300A SI-7300

Product Description

SI-7300A - Unipolar Driver ICs - Sanken electric

Application Note

n Determining the output

current IO (motor coil current)

The output current, lo is fixed by the following circuit elements:

RS : Current detection resistor

VCC2 : Supply voltage

RX : Variable current resistor

To operate a motor at maximum current level, set Rx =

infinity (open). Based on the specifications of SI-7300A, its

output current lo can be seen as:

lo (rms value): 535 to 625 mA

To compute lo when different values are used for Rs and

VCC2, use the approximation formula below. The maximum

ripple value IOH of the output current waveform can be

computed as follows:

.