Stepper motor drivers

7 September 2016 Analogue, Mixed Signal, LSI

Texas Instruments recently enhanced its high-performance stepper motor driver family with three new devices for 24 V stepper motors. Two devices offer the company’s patented AutoTune technology to eliminate stepper motor tuning, and to integrate current sensing to support differentiated 3D printers, robotics, factory automation equipment, currency counting machines and more.

AutoTune technology on the DRV8880 and DRV8881 devices eliminates the time consuming, iterative process of manual tuning, saving significant design time. This on-chip intelligence dynamically monitors the motor’s performance under varied conditions over its lifetime and adjusts decay settings appropriately. This functionality makes it possible to develop motors that run quietly and efficiently despite changes in motor properties, supply voltage, load and torque.

For motor systems that do not require the stability and longevity benefits of AutoTune technology, designers can take advantage of the DRV8884 and DRV8885 bipolar stepper motor drivers with integrated current sensing. TI incorporates a unique technology that eliminates two external sense resistors to accurately regulate the current to the motor, saving up to 20% board space and simplifying routing.

Designers can speed evaluation and design with the new stepper-motor drivers using the DRV8880EVM, DRV8881EEVM (for phase/enable interface), DRV8881PEVM (for PWM interface) and DRV8885EVM evaluation modules (EVMs).

For more information contact Erich Nast, Avnet South Africa, +27 (0)11 319 8600, [email protected], www.avnet.co.za

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