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The BLHV-1 is a step motor driver that can drive motors
rated from 1 to 7 amps/phase (unipolar rating). It can
handle 6-lead and 8-lead stepper motors. This driver
features a unipolar bilevel (or dual voltage) drive
technique with short and open circuit protection (with a
Fault LED and Fault Output). The basic function of a
motor driver is to provide the rated motor phase current
to the motor windings in the shortest possible time. The
bilevel driver uses a high voltage to get a rapid rate
of current rise in the motor windings in the least
amount of time. When reaching the preset trip current,
the driver turns off the high voltage and sustains the
current from the low voltage supply.
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