Diodes Incorporated has introduced the AL1678 family of LED Drivers, which are suitable for driving non-dimmable retrofit LED bulbs in general illumination applications that do not require high power factor (>0.7). Ensuring a low total circuit bill-of-material (BOM) cost while keeping performance high, these 500V buck-converter LED drivers support output powers up to 15W for wide-ranging LED lighting applications such as Class-A/B/P and GU10 lamps across all mains line voltages.
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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.
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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.
In 10k quantities, unit prices for the different wattage/LED current AL1678 parts are: 8W/120mA, AL1678-08BS7-13 $0.14 USD; 10W/180mA, AL1678-10BS7-13 $0.15 USD; and 15W/240mA, AL1678-20BS7-13 $0.17 USD. The LED drivers are supported by datasheets, applications and design notes, and evaluation boards with user guides.
source: http://www.powerpulse.net/story.php?storyID=32847
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