E-L6219R

步进电机驱动器 Stepper motor driver

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

**Key Features**

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Low output saturation voltage

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Internal pwm current control

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Internal thermal shutdown

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Able to drive both windings of bipolar stepper motor

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Wide voltage range 4.5V to 10V

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Output current up to 500mA each winding

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Built-in protection diodes

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Designed for unstabilized motor supply voltage

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HAlf-step, full-step and microstepp-ing mode