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DESCRIPTION

The TEF3718 and TEF3718S are bipolar monolithic integrated circuits intended to control and drive the current in one widing of a bipolar stepper motor. The circuits consists of an LS-TLL - compatible logic input, a current sensor, a monostable and an output stage with built-in protection diodes. Two TEF3718 or TEF3718S and a few external components form a complete control and drive unit for LS-TTL or microprocessor controlled stepper motor systems.

■ HALF AND FULL-STEP MODES

■ BIPOLAR DRIVE OF STEPPER MOTOR FOR MAXIMUM MOTOR PERFORMANCE

■ BUILT-IN PROTECTION DIODES

■ WIDE RANGE OF CURRENT CONTROL : 5 TO 1500 mA

■ WIDE VOLTAGE RANGE : 10 TO 50 V

■ DESIGNED FOR UNSTABILIZED MOTOR SUPPLY VOLTAGE

■ CURRENT LEVELS CAN BE SELECTED IN STEPS OR VARIED CONTINUOUSLY

■ THERMAL OVERLOAD PROTECTION

■ ALARM OUTPUT (TEF3718SP) OR PREALARM OUTPUT (TEF3718SSP)