Stepper-motor driver IC

June 14, 2012
The A4979 flexible microstepping motor driver with built-in translator is designed to operate bipolar stepper motors in full, half, quarter, and sixteenth-step modes, at up to 50 V and 1.5 A.

The A4979 flexible microstepping motor driver with built-in translator is designed to operate bipolar stepper motors in full, half, quarter, and sixteenth-step modes, at up to 50 V and 1.5 A. The unit is controlled by simple step and direction inputs, or through the SPI-compatible serial interface. Many features, as well as diagnostic feedback, are programmed through the serial port.

The current regulator can be programmed to operate in fixed off-time or fixed frequency PWM, with several decay modes to reduce audible motor noise and increase step accuracy. Phase-current tables are programmed via the serial interface to create unique microstep current profiles to improve motor performance.

Circuit protection includes cross-conduction when switching between high side and low-side drives. Outputs are protected from short circuits. Mixed decay, a key feature in the device, improves low load-current accuracy. Other protection measures include stall detection and hot and cold thermal warnings, overtemperature shutdown, and undervoltage lockout.

Allegro MicroSystems Inc.
115 Northeast Cutoff
Worcester, MA 01606
(508) 853-5000

Sponsored Recommendations

NEW Low Profile, Ultra Compact Power Supplies

March 13, 2024
Learn more HERE about Altech's Power supplies!

Altech's Liquid Tight Strain Relifs Catalog

March 13, 2024
With experienced Product Engineers and Customer Service personnel, Altech provides solutions to your most pressing application challenges. All with one thought in mind - to ensure...

Industrial Straight-Through Cable Gland

March 13, 2024
Learn more about Altech's cable glands and all they have to offer for your needs!

All-In-One DC-UPS Power Solutions

March 13, 2024
Introducing the All-In-One DC-UPS, a versatile solution combining multiple functionalities in a single device. Serving as a power supply, battery charger, battery care module,...

Voice your opinion!

To join the conversation, and become an exclusive member of Machine Design, create an account today!