■ PIN CONFIGURATIONS
Figure 2. Pin configurations
■ PIN DESCRIPTION
Motor output B, Motor current flows from MA to MB when Phase is high.
Clock oscillator. Timing pin connect a 56 kΩ resistor and a 820 pF in parallel
between T and Ground.
Motor supply voltage, 10 to 45 V. VMM pins should be wired together on
Ground and negative supply. Note these pins are used for heatsinking.
Make sure that all ground pins are soldered onto a suitable large copper
ground plane for efficient heat sinking.
Logic voltage supply normally +5 V.
Logic input, it controls, together with the I0 input, the current level in the
output stage. The controllable levels are fixed to 100, 60, 20, 0%.
Controls the direction of the motor current of MA and MB outputs. Motor
current flows from MA to MB when the phase input is high.
Logic input, it controls, together with the I1 input, the current level in the
output stage. The controlable levels are fixed to 100, 60, 20, 0%.
Comparator input. This input senses the instantaneous voltage across the
sensing resistor, filtered through a RC Network.
Reference voltage. Controls the threshold voltage of the comparator and
hence the output current. Input resistance: typically 6.8kΩ±20%.
Motor output A, Motor current flows from MA to MB when Phase is high.
Common emitter. Connect the sense resistor between this pin and ground.