AN1794

EVAL6207N board configuration

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9.1

Vref offset adjustment (R18)

Using a voltmeter monitor the voltage at the VrefA or VrefB test point on the EVAL6207N

board with respect to GND (CN1) when calibrating the offset.

9.2

Current scaling

When potentiometers R20 and R26 are set full clockwise, a 100% current setting on the

practiSPIN software screen corresponds to a Vref of approximately 0.88 Vdc or a peak

motor current of about 2.64 A.

The peak current can be set to a lower value by adjusting R15 and R18. The reference

voltage inputs can be monitored at the VrefA or VrefB test point.