Allegro MicroSystems, LLC Adds A New Motor Driver IC To Their Step And Direction Portfolio

October 8, 2013

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Worcester, MA – Allegro MicroSystems, LLC introduces a new, flexible microstepping motor driver with a built in translator for easy operation. Allegro’s A4992 is a single chip solution designed to operate bipolar stepper motors in full, half, quarter and eighth step modes, at up to 28 V (up to 50 V supply operation). At power-on, the A4992 is configured to drive most small stepper motors with simple step and direction inputs. The A4992 includes stall detect features and advanced diagnostics that can be configured through the serial interface. This new device is targeted at the automotive and industrial markets with end applications to include automotive adaptive headlamp systems, idle bypass valve positioning, HVAC vent position systems, EGR valves and satellite, solar panel and CCTV positioning systems.

The current regulator operates with fixed frequency PWM and uses adaptive mixed current decay to reduce audible motor noise and increase step accuracy. The current in each phase of the motor is controlled through a DMOS full-bridge using synchronous rectification to improve power dissipation. Internal circuits and timers prevent cross conduction and shoot through when switching between high-side and low-side drives.

The outputs are protected from short circuits and features for low load current and stalled rotor detection are included. Chip level protection includes hot thermal warning, over temperature shutdown, overvoltage and under voltage lockout. An optional serial interface mode, using the STEP, DIR and MS inputs, can be used to configure several motor control parameters and diagnostics.

The A4992KLPTR-T is supplied in a 20-pin TSSOP power package with an exposed thermal pad (package type LP). This package is lead (Pb) free with 100% matte-tin lead frame plating.



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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