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ESD protection devices keep HBLEDs lit up

Posted: 03 Sep 2009 ?? ?Print Version ?Bookmark and Share

Keywords:ESD protection? HBLED? lighting application?

CM1771 ESD protection

California Micro Devices debuts a new solution for ESD protection and thermal management for high power, high brightness LED (HBLED) lighting applications.

The latest product in the LuxGuard family of turnkey solutions, the CM1771 is claimed to be the first such device to feature a 100V breakdown voltage. This level of ESD protection is needed by a growing segment of high power HBLED applications that feature high output power, high efficacy levels reaching over 120 lumens/W, and those using multiple HBLEDs driven in a serial arrangement.

Delivering ESD protection at high operating voltages poses the new challenge of dissipating a higher level of power during an ESD strike, and also in maintaining acceptably low dynamic clamp voltages. A silicon-based, side mount protection solution with a back-to-back electrical configuration, the LuxGuard CM1771 provides robust, symmetrical ESD protection and features a very small, cost effective die that can easily be integrated into a broad range of HBLED lamp modules.

Growing market
The market for high power, HBLEDs has expanded beyond traditional market segments such as status and alphanumeric displays into a wider range of lighting applications including display backlighting, automotive, signs, and residential and commercial lighting. Market research firm iSuppli forecasts that the market for HBLEDs will increase from $1.5 billion in 2009 to $3.8 billion in 2012, a CAGR of 47 percent. Many of these segments, such as display backlighting and residential and commercial lighting, are taking advantage of designs featuring multiple, high power HBLEDs designed in a serial configuration, often with as many as thirty to forty HBLEDs per string to increase the brightness level. Existing side mount ESD protection solutions for HBLED offer breakdown voltages of less than 50V, making them incapable of providing a single-chip solution for these higher power and multiple HBLED applications.

The CM1771 offers back-to-back zener diode configuration for bi-directional ESD protection. It also safely dissipates ESD strikes of at least 6kV, human body model. Top pad composition is gold and it comes in a flip chip package.

Samples will be available starting October 2009 with mass production scheduled for Q1 10. Samples are priced at $0.05 per unit with a minimum purchase of one wafer.

For application notes on ESD protection click here.

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