Products, Materials & Tools | Jun 14, 2011

Micrel - High Current Density and High Accuracy Linear WLED Drivers

San Jose, Calif., June. 13, 2011 - Micrel Inc., (Nasdaq:MCRL), an industry leader in analog, high bandwidth communications and Ethernet IC solutions, today unveiled a pair of new linear WLED Drivers to further expand its lighting portfolio of products. The MIC4801/MIC4802 are single channel, constant-current sink LED drivers designed for architectural, landscape, and general LED lighting products. The MIC4801/MIC4802 are currently available in volume quantities with pricing starting at $0.58 and $0.62 respectively for 1Ku quantities. Samples can be ordered on line at:

"The MIC4801 /MIC4802 LED drivers are simple to use and do not require an inductor, eliminating noise, minimizing component count and simplifying numerous designs,"

noted Doyle Slack, senior marketing director for Analog.  "With its Ultra Fast PWM™ Control interface, both the MIC4801and the MIC4802 can achieve brightness control down to 1 percent duty cycle. "

The MIC4801 and the MIC4802 are high efficiency White LED (WLED) drivers designed to drive a single LED up to 600mA and 800mA respectively. The MIC4801 and the MIC4802 provide high efficiency as this architecture has no switching losses present in traditional charge pumps or inductive boost circuits. Both devices feature low dropout voltages which allow the LEDs to be driven directly from low voltage sources and thus eliminates switching noise/losses which accompany the use of boost circuitry.

The high accuracy (±1 percent typical) current regulated WLED ensures uniform display illumination under all conditions. The brightness is controlled through an Ultra Fast PWM™ Control interface operating down to less than 1 percent duty cycle. The MIC4801 and the MIC4802 are available in an 8-pin SOIC package and 8-Pin ePad SOIC package respectively with a junction temperature range of -40°C to +125°C. All supporting documentation, including the datasheets, can be found on Micrel's website at:

Note: Ultra Fast PWM is a trademark of Micrel, Inc


About Micrel

Micrel, Inc. is a leading global manufacturer of IC solutions for the worldwide analog, Ethernet and high bandwidth markets.  The Company's products include advanced mixed-signal, analog and power semiconductors; high performance communication, clock management, Ethernet switch and physical layer transceiver ICs.  Company customers include leading manufacturers of enterprise, consumer, industrial, mobile, telecommunications, automotive, and computer products.  Corporation headquarters and state-of-the-art wafer fabrication facilities are located in San Jose, CA, with regional sales and support offices and advanced technology design centers situated throughout the Americas, Europe and Asia.  In addition, the Company maintains an extensive network of distributors and reps worldwide.  Web:

For further information, contact Julieanne DiBene at: Micrel, Incorporated, 2180 Fortune Drive, San Jose, California 95131, 
(408) 944-0800; or visit the Micrel website at:


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