Description
The L6219R 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 L6219R 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 10V 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 500mA with peak start-up current up to 1A.
Wide range of current control from 500mA (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 ther mal protection circuitry disables the outputs if the chip temperature exceeds safe operating limits.

Features
■ ABLE TO DRIVE BOTH WINDINGS OF BIPOLAR STEPPER MOTOR
■ OUTPUT CURRENT UP TO 500mA EACH WINDING
■ WIDE VOLTAGE RANGE 4.5V TO 10V
■ 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