Date: 05/11/2009
NXP announces new innovations in LED drivers
NXP Semiconductor has announced the three major developments in its portfolio of mains connected LED driver solutions such as the SSL2101 LED driver IC is capable of matching LED lifetimes in an accelerated lifetime test, the SSL2102 integrated dimmable mains LED driver IC for SSL retrofit lamps and modules, and the launch of its online design tool for SSL applications, which makes it easy to test the behavior of LED lighting applications based on four NXP products.
"LED lighting has the potential to be ten times more efficient than incandescents, with manufacturers reporting lifetime figures exceeding 50,000 hours. The reliability of the electronic components - particularly the LED driver - is critical to the overall reliability of most LED systems," said Jacques le Berre, director of marketing and business development for lighting solutions, NXP Semiconductors. "Through our ongoing lifetime test, which has now surpassed 7,000 hours, we've set a new benchmark and proven that NXP's mains LED controller and driver ICs are up to the challenge of supporting extreme long-life lamps. Further, the addition of the SSL2102 and the launch of our new online design tool are making it even easier for innovative lighting companies to accelerate product development and speed the adoption of LEDs in the general lighting market."
NXP Semiconductor tested a random lot of SSL2101 IC drivers from standard production in high-stress conditions, all of which remain fully functional after running for over 7,000 hours with an IC junction temperature of 150°C. Multiple tests and set-ups were used to detect all possible failure modes in several use cases like continuous-on, on/off switching cycle and various combinations. The extrapolated lifetime of the SSL2101 in real lighting applications, based on a lifetime acceleration model, is estimated as follows,
Over 60,000 hours lifetime at 105°C
Over 35,000 hours lifetime at 115°C
Over 20,000 hours at 125°C
Over 7,000 hours at 150°C
The SSL2102 is suitable for high-efficiency and high-power factor SSL applications, including SSL retrofit lamps from 8W to 15W, LED modules such as LED spots and down-lights from 15W and 25W, and LED strings for retail display up to a maximum of 25W.
The key features of the SSL2102 include,
Natural dimming via a built-in logarithmic curve
Support for the majority of available dimmers (e.g. TRIAC, transistor)
Limited external components required due to high integration level
Switched SMPS controller with buck and flyback configurations
Thermally enhanced SO20 wide body package
Valley switching detection for optimized efficiency
Built-in demagnetization detection
Built-in Over Temperature Protection (OTP)
Supports start-up from rectified mains voltage
A fully integrated LED driver that includes both the controller and the switches, the SSL2102 offers the same functions as the SSL2101 but with high power, enabling design engineers to use one design on several different end products for a wide range of power ratings.
NXP's new online design tool to evaluate and test the behavior of LED lighting applications including the new SSL2102 and SSL2101 for dimmable applications, and the SSL1522 and SSL1523 for non-dimmable applications.
The tool enables engineers to quickly select the IC they need and test designs for LED drivers from 2W up to 25W. Two different application types can be created are isolated (flyback) and non-isolated (buck) converters. The tool generates schematic, component and transformer parameters, calculates the design's efficiency, and presents an overview of efficiency losses. The suggested applications include SSL retro-fit lamps, LED modules and power supplies, LED strings, LED ballasts, contour lighting, channel letter lighting, and other LED lighting applications.
Availability:
NXP SSL2102: Now
For more details visit www.nxp.com
Editorial Product Rating: Average