Allegro MicroSystems, LLC Introduces New Family of Complete Microstepping Motor Driver ICs

Simple Step and Direction Interface Makes MicroStepping Easy and Accurate

February 2, 2016

A5976-7-9 Product Image

Worcester, MA – Allegro MicroSystems, LLC introduces a new family of complete microstepping motor driver ICs with built-in translators. Allegro’s A5976, A5977, and A5979 have been designed to operate bipolar stepper motors in full-, half-, quarter-, eight, (A5977) and sixteenth- (A5976/79) step modes. All have the output drive capability of 40 V and ±2.8 A and include a fixed off-time current regulator that has the ability to operate in slow-, fast-, or mixed-decay modes. This current-decay control scheme results in reduced audible motor noise, increased step accuracy, and reduced power dissipation. These devices are targeted at the office automation and industrial automation markets including textile and sewing machines, vending machines, printers, scanners, copiers, closed circuit TV camera positioning, ATM machines, 3D printing systems, and food industry applications.

The translator is the key to the easy implementation of these devices. Simply inputting one pulse on the STEP input drives the motor one step or microstep (two logic inputs determine if it is a full-, half-, quarter-, eighth- or sixteenth – step resolution). There are no phase sequence tables, high-frequency control lines, or complex interfaces to program. The interface is an ideal fit for applications where a complex microprocessor is unavailable or overburdened. Internal synchronous rectification control circuitry is provided to improve power dissipation during PWM operation. Internal circuit protection includes OCP (overcurrent protection) thermal shutdown with hysteresis, undervoltage lockout (UVLO), and crossover-current protection. An open-drain FAULT output is included in the A5976 for improved diagnostic reporting. Special power-up sequencing is not required.

All three devices are supplied in a thin (<1.2 mm) 28-pin TSSOP with an exposed thermal pad (suffix LP) for enhanced thermal dissipation. The package is lead (Pb) free (suffix -T), with 100% matte-tin leadframe plating. Operating ambient temperature range is -40°C to 105°C.



A propos d'Allegro

Allegro MicroSystems, LLC est leader dans le développement, la fabrication et le marketing de circuits intégrés de puissance ainsi que de capteurs magnétiques à effet Hall. Les solutions innovantes d'Allegro sont utilisées dans des applications à forte croissance dans les secteurs tels que l'automobile, la communication, l'ordinateur et la bureautique, les produits grand publique ainsi que dans l'industrie. Le siège social d'Allegro est à Worcester dans le Massachusetts (USA) avec des centres de design et d'application situés en Amérique du Nord et du Sud, en Asie et en Europe. De plus amples informations concernant Allegro peuvent être trouvées sur le site Allegro www.allegromicro.com.

Le siège européen d’Allegro MicroSystems Europe en charge des ventes et du marketing se situe à Chertsey en Grande Bretagne. Ce centre coordonne un réseau de représentants et de distributeurs à travers l’Europe. Allegro possède aussi des centres d’applications et marketing à Annecy en France ainsi qu’à Edimbourg en Ecosse.


Contacts Marketing:

Mary Regan
Allegro MicroSystems Europe Ltd.
Tel: 04 50 51 23 59
Email: allegroeurope@allegromicro.com
www.allegromicro.com

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