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L6219R

4

Application Informations (Note 1)

Some stepper motors are not designed for contin-uous operation at maximum current. As the circuit drives a

constant current through the motor, its temperature might increase exceedingly both at low and high speed op-

eration.Also, some stepper motors have such high core losses that they are not suited for switch mode current

regulation.

Unused inputs should be connected to proper voltage levels in order to get the highest noise immunity.

As the circuit operates with switch mode current regulation, interference generation problems might arise in

some applications. A good measure might then be to decouple the circuit with a 100nF capacitor, located near

the package between power line and ground.

The ground lead between Rs, and circuit GND should be kept as short as possible.

A typical Application Circuit is shown in Fig. 6.

Note that Ct must be NPO type or similar else.

Figure 6. Typical Application Circuit.