Allegro MicroSystems, Inc. Announces New 3.0 A Buck LED Driver

Designed to Drive High Power LEDs

September 18, 2012

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Worcester, MA – Allegro MicroSystems, Inc. announces the release of a new switching buck regulator LED driver that provides constant-current output to drive high-power LEDs. With a wide input supply voltage from 6 to 48 V, Allegro’s A6211 device integrates a high-side N-channel MOSFET switch for DC-to-DC stepdown (buck) conversion. A true average current is output using a cycle-by-cycle, controlled on-time method. This new device has significant fault protection advantages including design techniques to address pin-pin shorts, pin-ground shorts and open and shorted external components. It was designed for the consumer, industrial, and architectural lighting markets in addition to light bars for scanners and multifunction printers.

The LED current is user-configurable by an external current sense resistor, allowing the output voltage to be set to optimize constant-current supply for a wide variety of LED array configurations, This includes multiple LEDs in series, in a single string or parallel strings, while ensuring optimal system efficiency. LED dimming is accomplished by a direct logic input pulse width modulation (PWM) signal at the enable pin. The enable pin is also designed to accommodate connection to the Vin supply to allow simple on/off operation without a separate enable signal.

The A6211GLJTR-T is provided in a compact 8-pin narrow SOIC package (suffix LJ) with exposed pad for enhanced thermal dissipation. It is lead (Pb) free, with 100% matte tin leadframe 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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