DESCRIPTION

The L6219 is a bipolar monolithic integrated circuits intended to control and drive both winding of a bipolar stepper motor or bidirectionally control two DC motors.

The L6219 with a few external components form a complete control and drive circuit for LS-TTL or microprocessor controlled stepper motor system.

The power stage is a dual full bridge capable of sustaining 46V and including four diodes for current recirculation.

A cross conduction protection is provided to avoid simultaneous cross conduction during switching current direction.

An internal pulse-width-modulation (PWM) controls the output current to 750mA with peak start up current up to 1A.

Wide range of current control from 750mA (each bridge) is permitted by means of two logic inputs and an external voltage reference. A phase input to each bridge determines the load current direction.

A thermal protection circuitry disables the outputs if the chip temperature exceeds safe operating limits.

■ ABLE TO DRIVE BOTH WINDINGS OF BIPOLAR STEPPER MOTOR

■ OUTPUT CURRENT UP TO 750mA EACH WINDING

■ WIDE VOLTAGE RANGE 10V TO 46V

■ HALF-STEP, FULL-STEP AND MICROSTEPPING MODE

■ BUILT-IN PROTECTION DIODES

■ INTERNAL PWM CURRENT CONTROL

■ LOW OUTPUT SATURATION VOLTAGE

■ DESIGNED FOR UNSTABILIZED MOTOR SUPPLY VOLTAGE

■ INTERNAL THERMAL SHUTDOWN