Allegro MicroSystems, LLC Introduces Industry’s First Automotive Integrated Buck LED Driver to Include Internally Generated PWM Dimming Capability

Removes Need for Local Microcontroller or 555 for Dimming Control

January 19, 2016

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Worcester, MA – Allegro MicroSystems, LLC announces two new single-IC switching regulators that provide constant-current output to drive high-power LEDs. Allegro’s A6214 and A6216 devices integrate a high-side N-channel DMOS switch for DC-to-DC step-down (buck) conversion. A true average current is output using a cycle-by-cycle, controlled on-time method. Combined with automotive-grade quality and feature-rich functionality, a host of safety and robust protection features makes the A6214 and A6216 devices ideal for automotive lighting applications where high quality and reliability are highly desired and essential.

Internal 5 V, 10 mA LDO provides added flexibility and cost savings for driving external loads if required by the system. User-selectable output current provides system design and application flexibility, PWM as well as analog dimming capability provides precise LED current control, and automatic output voltage adjustment based on the number of LEDs in a single string ensures optimal system efficiency. LED dimming is accomplished by a direct logic input pulse-width-modulation (PWM) signal at the enable pin. Alternatively, an analog dimming input can be used to calibrate the LED current or implement thermal foldback in conjunction with an external NTC thermistor. (The A6216 has the added capability to generate its own PWM dimming frequency and duty cycle in stand-alone mode that provides LED light dimming control without the need of a microcontroller or 555 timer.)

Allegro’s A6214 is provided in a compact 10-pin narrow SOIC package (suffix LK). The A6216 is available in a 16-pin TSSOP package (suffix LP), both with exposed pad for enhanced thermal dissipation. Both are 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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