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)