Allegro MicroSystems, Inc. Introduces New Single Stage Off-Line LED Driver IC Series

Power Factor Corrected LED Driver ICs for Isolated LED Driver Designs

April 5, 2012

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Worcester, MA – Allegro MicroSystems, Inc. introduces the LC5540LD/LF single stage power factor corrected off-line LED driver IC series which is manufactured and developed by Sanken Electric Co., Ltd. in Japan. The robust functions within these single stage converters have been developed to simplify system designs. This new series is targeted at the consumer and industrial markets targeting indoor and outdoor LED lighting and off-line LED lighting applications.

The LC5540LD/LF series are quasi-resonant topology switching power supply ICs, designed for input capacitorless applications making it possible for systems to comply with the harmonics standard (IEC61000-3-2 class C). These devices incorporate separate controller and power MOSFET chips. The controller adapts the average current control method for realizing high power factors, and the quasi-resonant topology contributes to the high efficiency and low EMI noise. The rich set of protection features helps to realize low component counts and high performance-to-cost power supply.

These devices are intended for isolated designs. The incorporated MOSFET has a VDSS(min) rating from 650 V (LC5545LD, LC5546LD, LC5546LF, and LC5547LF,) to 800 V (LC5548LD and LC5549LF). The RDS(on)(max) is 1.1 Ω (LC5547LF), 1.9 Ω (LC5546LD and LC5546LF,) and 3.95 Ω (LC5545LD). These devices are capable of a maximum output power of 20 to 80 W on a 230 VAC supply to 16 W (LC5546LD) to 55 W (LC5547LF) on a universal supply based on the thermal rating. Note that the maximum output power can be up to 120% to 140% of this value. However, it may be limited in applications with low output voltage or short duty cycle.

This series is available in the DIP8 and TO220 packages that have been designed to protect the IC and overall system from excessive heat. Similar competitive designs on the market cannot easily detect the power MOSFET rising temperatures.



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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