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.



Sobre Allegro

Allegro Microsystems, LLC es una empresa líder en el desarrollo, fabricación y comercialización de semiconductores de alto rendimiento. Las soluciones innovadoras de Allegro son útiles para aplicaciones de alto crecimiento dentro del mercado de la automoción, con enfoque adicional en la automatización de oficinas, industrial y soluciones de comunicaciones/consumo. Allegro tiene su sede en Worcester, Massachusetts (EE.UU.) con centros de diseño, aplicaciones y de soporte de ventas ubicados en todo el mundo. Más información sobre Allegro se puede encontrar en www.allegromicro.com

Allegro Microsystems Europa, con sede en Chertsey, Reino Unido, es la oficina operativa de ventas y comercialización europea, y opera una red de representantes y distribuidores en toda Europa. Allegro cuenta con centros técnicos y de marketing en Heidelberg y Hinterzarten en Alemania. Allegro también dispone de un centro de ingeniería de diseño en el centro de Edimburgo, en Escocia y un centro técnico y de marketing en Annecy en Francia.


Contactos de marketing:

Allegro MicroSystems Europe Ltd.
Tel: +33 (0) 4 50512359
Fax: +33 (0) 4 505 12083 

Email: allegroeurope@allegromicro.com
www.allegromicro.com

 

 

 

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