BIPOLAR STEPPER MOTORS APPLICATIONS

Bipolar stepper motors can be driven with one

L6506 or L297, two full bridge BCD drivers and

very few external components. Together these

three chips form a complete microprocessor-to-

stepper motor interface is realized.

As shown in Fig. 18 and Fig. 19, the controller

connect directly to the two bridge BCD drivers.

External component are minimalized: an R.C. net-

work to set the chopper frequency, a resistive di-

vider (R1; R2) to establish the comparator refer-

ence voltage and a snubber network made by R

and C in series (See DC Motor Speed Control).

Figure 19: Two Phase Bipolar Stepper Motor Control Circuit with Chopper Current Control and Translator

Figure 18: Two Phase Bipolar Stepper Motor Control Circuit with Chopper Current Control

L6201

L6201PS

L6202

L6203

L6201

L6201PS

L6202

L6203

L6201

L6201PS

L6202

L6203

L6201

L6201PS

L6202

L6203

L6201 - L6202 - L6203

13/20