Application informations

L6219

12/16

3

Application informations

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 operation. 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 100 nF capacitor, located near the package between power line

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

similar else. To sense the winding current, paralleled metal film resistors are recommended

Figure 5.

Typical application circuit