diagram ingram

This motor stepper driver electronic project is designed using the PBL3717 motor driver manufactured by ST Microelectronics . The PBL3717A motor stepper driveris a monolithic IC which controls and drives one phase of a bipolar stepper motor with chopper control of the phase current. Current levels may be selected in three steps by means of two logic inputs which select one of three current comparators.

PBL3717A Motor Stepper Driver Circuit Diagram


When both of these inputs are high the device is disabled. A separate logic input controls the direction of current flow. A monostable, programmed by an external RC network, sets the current decay time. The output current for this project is up to 1A from 10 up to 46 volt motor supply . The logic inputs I0 and I1 set at three different levels the amplitude of the current flowing in the motor winding .

A high level on the "PHASE" logic input sets the direction of that current from output A to output B and a low level from output B to output A. It is recommended that unused inputs are tied to pin 6 (Vss) or pin 4 (GND) as appropriate to avoid noise problem. The current levels can be varied continuously by changing the reference voltage on pin 11.  In this bipolar stepper motor driver project , the Vss is the logic power and must be around 5 volt and VS is the motor power and must be between 10 and 46 volts .