Allegro MicroSystems, Inc. Announces New Full-Bridge DMOS PWM Motor Driver ICs

With Internal Fixed Off-time PWM for Adjustable Current Limit

August 30, 2011

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Worcester, MA - Allegro MicroSystems, Inc. announces the release of two devices that complement the next generation family of fully-integrated single, full-bridge motor driver ICs. Allegro’s A4952 and A4953 are designed for use in brush DC motor drive applications and are rated for peak output currents to ±2 A, and operating voltages to 40 V. Input terminals are provided for use in controlling the speed and direction of a DC motor with externally applied PWM control signals. Both devices feature internal fixed off-time PWM where the maximum current can be adjusted by the user’s selection of an optional sense resistor and the voltage applied to a VREF pin.

Internal synchronous rectification control circuitry is provided to lower power dissipation during PWM operation. Internal circuit protection includes overcurrent protection (OCP), motor lead short to ground or supply, thermal shutdown with hysteresis, under voltage monitoring of VBB, and crossover current protection. The A4952 includes a FAULT pin and the ability to change the behavior of the OCP latch based on the logic level applied to the RTRY pin. These devices are primarily targeted at the office automation market; however, they are also suitable for commercial and industrial applications requiring a brush DC motor driver IC.

The A4952ELYTR-T is available in a 10-pin MSOP package and the A4953ELJTR-T is available in an 8-pin SOICN package. Both packages feature an exposed pad for enhanced thermal dissipation and are lead (PB) free with 100% matte tin plated lead frames.



Über Allegro MicroSystems

Allegro MicroSystems Inc. ist ein führendes Unternehmen bei der Entwicklung, Fertigung und Vermarktung von leistungsfähigen Power- und Halleffekt-Sensor-ICs. Die innovativen Lösungen von Allegro zielen auf die Wachstumsmärkte in den Bereichen Automobilelektronik, Kommunikation, Computer/Büroautomatisierung, Konsumer- und Industrieelektronik. Allegro hat seinen Firmensitz in Worcester, MA, USA mit Design- und Applikationszentren in Nord- und Südamerika, Asien und Europe. Weitere Informationen findet man unter: www.allegromicro.com.

Allegro MicroSystems Europe hat seinen Firmensitz in Chertsey, Großbritannien, und stellt die europäische Vertriebs- und Marketing-Niederlassung dar. Von hier aus wird ein Netzwerk von Repräsentanten und Distributoren in Europa geführt. Allegro unterhält außerdem Applikations- und Marketingzentren in Heidelberg, Deutschland sowie in Annecy, Frankreich. Hinzu kommt ein Entwicklungszentrum in Edinburgh, Schottland.


Pressekontakt

Allegro MicroSystems Germany GmbH
Tel: +49 (0) 6221 8723 5
Email: info.germany@allegromicro.com
www.allegromicro.com

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