LED drivers support output powers of up to 15W

21st August 2015
Posted By : Siobhan O'Gorman
LED drivers support output powers of up to 15W

 

Suitable for driving non-dimmable retrofit LED bulbs in general illumination applications that do not require high power factor, the AL1678 family of LED drivers has been introduced by Diodes Incorporated.

Ensuring a low total circuit BOM cost while keeping performance high, these 500V buck-converter LED drivers support output powers of up to 15W for wide-ranging LED lighting applications such as Class-A/B/P and GU10 lamps across all mains line voltages.

The AL1678 family, offered in SO-7 packages, provides a variety of different current-rated 500V MOSFETs that allow designers to select the most appropriate driver to meet the needs of different bulb wattage and cost requirements.

With its improved driver topology, the AL1678 family provides significant circuit flexibility and delivers accurate constant current line and load regulation over the 85 to 277VAC universal input range. In addition, by operating in boundary-conduction mode, the drivers keep EMI low with high efficiency, greater than 90%, which aids with EMC compliance.

The AL1678 LED drivers’ total BOM lamp cost is low because it removes the need for an external high-voltage MOSFET and an auxiliary winding, while requiring only a single external inductor. Integrated protection features include under-voltage lockout, over-temperature protection, LED open- and short-circuit protection, as well as a thermal fold-back function to help improve the system reliability of retrofit LED lamps at high temperature. The AL1678’s SO-7 package also helps improve electrical isolation and offers improved moisture resistance.


You must be logged in to comment

Write a comment

No comments




Sign up to view our publications

Sign up

Sign up to view our downloads

Sign up

Developing secure and scalable IoT solutions
21st June 2018
United Kingdom Cocoon Networks, London
SENSOR+TEST 2018
26th June 2018
Germany Nürnberg Exhibition Centre
European Microwave Week 2018
23rd September 2018
Spain Ifema Feria De Madrid
Engineering Design Show 2018
17th October 2018
United Kingdom Ricoh Arena, Coventry
electronica 2018
13th November 2018
Germany Messe Munchen